Pusat Pengajian Kejuruteraan Mekanikal - Monograf

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20 kwe biomass downdraft gasifier system
(2005-03-01)
Ishak, Mohd Asrul
A small scale downdraft gasifier that has producing 20kW biomass generator had been set to provide electrical power for the rural areas have been developed. The downdraft gasifier is erected in the laboratory at the School of Mechanical Engineering, Universiti Sains Malaysia (USM). In this research, gasification system in used is gasifier in lower flow with a wood as a biomass sources. Many modification were made during installation and this experimented to make it suit with surrounding condition and to improve the performance of the system. Experiments have been performed of gasification of furniture wood as raw material. The system performance of the gasifier had been determined by finding the efficiency of the system, moisture content and diesel displacement. The system of the downdraft gasifier also involved the development of power absorbing system using 24 kW electrical loading as heating element has been successfully done. The overall efficiency of the system at full speed is 3.64% to 15.75% and minimum speed is 4.16% to 21.5% depending on the electrical load used to absorb the power from the generator. Air flow rate of the producer gas also increase with the speed of generator. The moisture content of the wet wood is quite small but still in the range.
A classification model on types of cycling based on cycling behavior
(2023-07-14)
Chieng, Hui Zhi
Cycling has gained popularity as a form of exercise, and individuals use various cycling techniques and habits depending on their interests. On the basis of cycling behavior, there has been little study on classification models for different types of cycling. Therefore, the goal of this project is to create a supervised learning approach to categorize different cycling kinds using data on cycling performance behavior. In order to categorize different types of cycling based on cycling behavior, this study compares the performance of several classification algorithms at 10-fold cross validation mode, including BayesNet, SMO, IBk, KStar, RandomizableFilteredClassifier, and RandomTree, on two case studies taken from publicly available data. For CS1 and CS2, respectively, the baseline classifier, ZeroR, is 51.52% and 38.64%. CS1 was typically accurately identified using a variety of methods, including BayesNet, SMO, IBk, and RandomTree. IBk and KStar, with a maximum accuracy of 71.59%, are the algorithms that demonstrate the highest accuracy for CS2. The results help us understand cycling activities better, making it easier for cyclists to develop individualized training plans and make decisions in a variety of settings
A comparative study on the impact of robot-assisted lower limb rehabilitation on work-related musculoskeletal disorders among physiotherapists.
(2024-07-10)
This study investigates how robot-assisted lower limb rehabilitation affects WMSDs among physiotherapists. The study aimed to evaluate WMSDs risks associated with conventional rehabilitation tasks through ergonomic and biomechanical analysis and to assess the effectiveness of collaborative robots in mitigating these risks. Physiotherapists are susceptible to WMSDs because of the physical demands of manual rehabilitation exercises, particularly for stroke patients. By conducting a lab test and utilizing the AMS for musculoskeletal modelling and simulation, we analysed the lumbar loads and postures of simulated physiotherapists during passive ROM exercises. Six individuals were recruited to perform a series of four passive ROM exercises, i.e., dorsiflexion and plantar flexion, hip abduction and adduction, hip flexion, as well as knee flexion and extension, in both baseline and intervention studies with the UR16e Robot. The subjects are required to wear the Xsens MoCap system, and the entire experiment is carried out on the Bertec Force Plates. Then, the kinematic data and force data were input into AMS software, and a dynamic biomechanical model was constructed to quantify the shear force (AP, ML) and compression force (PD) acting on all lumbar disc levels (L1-L2 to L5-S1). The findings revealed significant lumbar loads and high-risk postures exceeding recommended limits, indicating an elevated risk of lower back injuries. REBA scores also depicted the medium to high risk associated with passive ROM activities due to repetitively awkward posture. However, the introduction of a UR16e Robot notably reduced lumbar loads and improved postural ergonomics in most ROM activities, demonstrating the potential of robot-assisted rehabilitation to mitigate WMSDs risks. Hip abduction and adduction, hip flexion, and knee flexion and extension are statistically significant at the 90% confidence level after the interventions (p < 0.10). The study underscores the importance of integrating assistive robots in rehabilitation to enhance the safety and well-being of physiotherapists, promoting a sustainable and injury-free work environment. Further investigation with a randomized clinical trial is suggested for a better evaluation of WMSDs risk factors and prevalence among physiotherapists.
A comparative tensile analysis of 3D printing with simulation for aerospace-grade material and parametric study on 3D printing variables that impact time and material consumption
(2023-07-25)
Chee, Hon Kit
The study utilized additive manufacturing (AM) through layer-by-layer fabrication, which transforms digital designs into physical objects. The utilization of 3D printing technology greatly enhances the capabilities for fabricating lightweight components, intricate and advanced geometries, as well as cost effective components which might be feasible to adopt within the aerospace industry. The Taguchi analysis with an L16b orthogonal array was employed to analyze the effects of various parameters including infill density, infill structure, print speed, layer height, and bed temperature. The investigation revealed that print speed exerted the most substantial influence on printing time. This underscored the importance of optimizing print speed to ensure efficient and time-effective 3D printing. In terms of material usage and tensile strength, infill density emerged as the most influential factor. Moreover, higher infill densities were found to enhance the tensile strength of the 3D printed specimens while infill density parameter is crucial for striking a balance between material usage and achieving desirable mechanical properties in the printed components. A comparison was made between 3D printed PLA carbon fiber composite specimens and simulations using Epoxy Carbon UD Prepreg and Epoxy Carbon UD Wet materials. The results demonstrated that conventional fiber materials used in aerospace applications exhibited significantly higher tensile strength (64.456 GPa) compared to the 3D printed PLA carbon fiber composite (31.751 MPa). The difference in tensile strength can be attributed to variations in material properties and composition, with the conventional fiber materials being specifically engineered and optimized for aerospace applications. 3D printing technology has shown remarkable potential in various aspects of aerospace applications, its adoption as a replacement for conventional manufacturing methods is still a considerable distance away. The results of this study demonstrate that although 3D printing offers advantages such as customization, reduced tooling costs, and the ability to fabricate complex geometries, there are limitations to its mechanical performance compared to conventional fiber materials specifically engineered for aerospace applications.
A computational fluid dynamics (cfd) macro modeling and simulation of single chamber solid oxide fuel cell (sc-sofc)
(2008-04-01)
Koay, Hai Siu
Single Chamber Solid Oxide Fuel Cell (SC- SOFC) has been gaining popularity lately due to its simplified structure, absence of gas seal and reduced cell manufacturing cost. It has also been shown to produce higher power density ~700 mW/em' and makes it useful in many applications. The characteristic and performance of a SC- SOFC system has been greatly dependant on the gas flow condition inside the gas channel, the chemical reaction inside the porous electrode and the heat generation and transfer inside the gas channel. In this research, three submodels of SC- SOFC operating inside a gas channel were simulated and analyzed using FLUENT. Gas Flow and Porous Media Transport/ Reaction submodels were simulated at a minimum and maximum SC- SOFC temperature setting to analyze the effect of different operating temperature on the characteristic of the models. The Heat Generation and Transfer submodel were analyzed considering the effect of simulation with radiation and without radiation. The advantages of using CFD to simulate the various models are SOFC design model can be further improved before the actual prototype is made and tested, costs incurred by CFD are much lower if compared to conventional experimental procedures and the time needed to bring a design to market is very much reduced. Simulation and analysis of this research were compared to literatures available to obtain validated experimental efforts to verify the simulation results.
A computational fluid dynamics (cfd) macro moeling and simulation of single chamber solid oxide fuel cell (sc-sofc)
(2008-04-01)
Koay, Hai Siu
Single Chamber Solid Oxide Fuel Cell (SC- SOFC) has been gaining popularity lately due to its simplified structure, absence of gas seal and reduced cell manufacturing cost. It has also been shown to produce higher power density ~700 mW/cm* and makes it useful in many applications. The characteristic and performance of a SC- SOFC system has been greatly dependant on the gas flow condition inside the gas channel, the chemical reaction inside the porous electrode and the heat generation and transfer inside the gas channel. In this research, three submodels of SC- SOFC operating inside a gas channel were simulated and analyzed using FLUENT. Gas Flow and Porous Media Transport/ Reaction submodels were simulated at a minimum and maximum SC- SOFC temperature setting to analyze the effect of different operating temperature on the characteristic of the models. The Heat Generation and Transfer submodel were analyzed considering the effect of simulation with radiation and without radiation. The advantages of using CFD to simulate the various models are SOFC design model can be further improved before the actual prototype is made and tested, costs incurred by CFD are much lower if compared to conventional experimental procedures and the time needed to bring a design to market is very much reduced. Simulation and analysis of this research were compared to literatures available to obtain validated experimental efforts to verify the simulation.
A design and analysis of mems relay for electronic packaging application
(2006-03-01)
Mohd Kamal, Abu Hanifah
There are many researches and developments (R&D) about Micro-Electro-Mechanical System (MEMS) have been done and this field is developing. By seeing this, we also have done research about MEMS and our research is about ‘A design and analysis of MEMS relay for electronic packaging.’ The objective is to improve the performance of relay in operation. The research is more about modification of relay which is GRF172 in dimension and material property and application of thermal stress to the relays. The modification relay will be compared to origin relay to see which relay has the best performance in electronic packaging. The relay which has been modified both in dimension and material property has the best performance.
A new design of filtering system by using 3d scanner app
(2023-07-01)
Nur Faqiha Binti Ahmad Latif
This dissertation introduces a novel approach to designing a filtering system by harnessing the capabilities of a 3D scanner app. The algae filtering system commonly used in photobioreactor. Photobioreactors are widely utilized for cultivating microorganisms, particularly algae, for various applications such as biofuel production and wastewater treatment. Various types of photobioreactors, such as open pond systems, tubular photobioreactors, and flat panel photobioreactors, are examined for their advantages, limitations, and operational considerations. The review examines the types of algae harvesting technologies employed in water treatment and biomass production. Mechanical methods like centrifugation and filtration, as well as physical and chemical methods like flocculation and flotation, are reviewed for their efficiency in algae separation and concentration. Moreover, the review addresses the role of 3D scanner apps in optimizing algae filtering system design. Different types of 3D scanner apps, including handheld, desktop, mobile, and cloud-based variants, are discussed for their features and capabilities in fabricating and optimizing algae filtering systems. the potential benefits of the proposed algae filtering system, including improved water quality, reduced maintenance requirements, and increased operational efficiency. By leveraging 3D scanning technology, the system design can be customized to meet specific client requirements and site conditions, resulting in a tailored solution for effective algae removal. The study aims to address the limitations of existing algae filtering systems by incorporating innovative design techniques and utilizing the capabilities of 3D scanner apps. The results of this research are expected to contribute to the advancement of algae removal technologies, providing valuable insights for the design and implementation of efficient and sustainable filtering systems.
A numerical study on the flexure behaviours of aluminium 5052-h32 alloy subjected to different rates strain
(2023-07-14)
Mohd Azmirulnizam bin Azmin
This thesis focuses on conducting a numerical study to examine the flexure behaviours of Aluminium 5052-H32 alloy subjected to different strain rates. Aluminium alloys are widely used in structural applications due to their favourable combination of strength, lightweight properties, and excellent formability. Understanding the response of these alloys to different loading conditions, particularly strain rates, is crucial for ensuring their optimal performance and structural integrity.The objective of this research is to investigate and analyse the flexural characteristics of Aluminium 5052-H32 alloy under varying strain rates. Flexural behaviours refers to the response of a material when subjected to bending loads, which is of great importance in structural applications. By subjecting the alloy to different strain rates, ranging from quasi-static to high strain rates, the thesis aims to explore the influence of strain rate on the flexural properties, including stiffness, strength, and failure behaviours. To achieve the research goals, a numerical approach will be employed using finite element analysis (FEA). FEA allows for the simulation of complex loading conditions and provides valuable insights into the material's behaviours. The thesis will involve creating a finite element model of the Aluminium 5052-H32 alloy and subjecting it to various bending scenarios at different strain rates. The simulations will consider the material's anisotropic behaviours, incorporating its inherent microstructural features and mechanical properties. Furthermore, the thesis will examine the microstructural changes and deformation mechanisms that occur within the aluminium 5052-H32 alloy under different strain rates. This will involve analysing the distribution of stresses, strains, and deformation patterns within the material. The results will be compared and evaluated to identify any strain rate dependent trends or anomalies in the flexural behaviours of the alloy.
A single unit concept and design of a high maneuverability mobile robot
(2023-07)
Mathi Vathanii a/p Ravichandran
The aim of his project is to develop a single unit concept and design of a high maneuverability mobile robot to assists human beings in hazardous tasks. Robots that can climb walls can complete work in unsafe places where people might find them risky or inaccessible. They are able to work in challenging environments like high altitudes, cramped quarters, or places where chemicals, radiation, or extremely hot or cold circumstances could pose a risk. The risk to human workers is greatly decreased by utilising a wall-climbing robot. The robot's ability to maneuver through a dangerous environment and carry out activities without putting people in danger reduces the likelihood of mishaps, injuries, or exposure to poisonous materials. This magnet embedded wall-climbing robot is able climb vertical surfaces like metal buildings, ceilings, or walls. This makes it possible for it to reach places that are difficult or hazardous for humans to access, such as heights. It offers human employees who would normally need to use ladders, scaffolding, or harnesses a safer alternative. Furthermore, the robot can firmly cling to surfaces thanks to the high magnetic force, which also ensures its attachment even in risky or unstable conditions. This stability reduces the possibility of the robot falling or slipping, which is essential when working in high or risky places. This design is able to solve the existing limitations of wall-climbing robot. A solid model drawing has been created using SolidWorks software and control system were done by using Arduino IDE software and Blynk app. Then, the prototype was fabricated using 3D printing and also cutting process. The hardware that have been used to connect the robot are NODEMCU ESP32 board, L298N motor driver and DC motors. After building the prototype the experimental studies and testing on the prototype were carried out. The final phase of the project was the application of the prototype on the real surface of the environment which is metal or iron board which acts as the wall. The robot was activated with the Wi-Fi. The prototype of the wall climbing robot was able to move in vertical direction of the wall with the magnetic adhesion from Neodymium magnet that has been attached with passive attachment.
A study falling particles in various types of fluids with different viscosity
(2001-02-01)
Musa, Shah Mudzaffar
In many kind of process, especially technical separation, there is always been a motion of particles in certain medium. The transferable of particles from one place to another make it easier for some system or process to meet its target. The medium can be anything that is like liquid or gaseous, weather it is in stationary or in motion. For example, the disposable ashes form gas medium, transformation of solid from wasted air, and also the recycle process to gain back the acidic fluid form chemical plantation. Overall, there are many literatures that have been published for public knowledge, and there a lot of knowledge that can be gained from these journals about motion of fluid with a stationary immersed particle in it. All of the parameters and variables that related to this thesis are considerably useful to generate new ideas and new models of equations. The purpose of it is to get the variations of velocity and acceleration relatively with time and distance deviation. In this thesis, a mathematical model was develop for a spherical particle falling in various type of liquid with different value of viscosity i.e. viscosity of acid acetic, 1 u 0.001095 Ns m2, alcohol, ethyl, propyl. =u 0.00164 Ns m-2, kerosene, u 2 =u 0.00192 Ns m-2, alcohol u 0.00153 Ns m-2, mercury,=u 0.001375 Ns m-2, and turpentine, =u 0 . 001155 Ns m-2. The mathematical model was solved using the boundary conditions, the sum of all forces that acted on the spherical particle and some assumption has been made to solve the equations model. An expression was obtained, from which the velocity versus time was deducted for transient and steady state conditions. This result is a simulation of a fall particle in a heated fluid, but in order to get the mathematical solutions, the simulations was change to a falling particle in various type of fluid with different value of viscosity. The results that were obtained here maybe not as same as the experimental value if it was conducted, but think of how powerful a mathematical model is when it is applied to gain the result of an experiment that hasn’t been done yet.
A study of crack behavior in a qfp electronic package under the combination of thermal and pressure loading
(2002-03-01)
Awang, Azizo
Crack is one of the primary problems faced in packaging. This phenomenon happened because of some factors such as thermal and pressure loading and unsuitable material is used. It caused losses suffer by the manufacturer and consumer alike. This is because the presence of crack in electronic package will cause package to fail during operation. Thus, many researches have been done about crack in electronic package. For this project, the study is to determine crack behavior in a QFP electronic package under the combination of thermal and pressure loading. The value of G (strain energy release rate) and K (stress intensity factor) are primary measurement to explain crack behavior. To get this value, Modified Crack Closure Integral (MCCI) method is used. Beside that, the understanding of linear elastic fracture mechanics (LEFM) concept is important because it was related with the parameters G and K. IDEAS Master Series 8A (Open GL) will be used as a main software to solve the model to get the primary data. There are three stages on using IDEAS which are modeling, analyzing and post processing. In this analysis, IDEAS will use finite element analysis (FEA) method to solve the model. The main objective of this study is to determine package behavior under the combination of thermal and pressure loading. For that, two analyzed cases are used. Firstly, thermal and pressure loading with variable distance of pressure at crack and secondly is thermal and pressure loading with variable values of pressure.
A study of manufacturing process and structural integrity of corroded sac305 lead free solder
(2023-07-01)
Muhammad Afif Aiman Bin Muhd Taufiq
The growing demand for lead-free solder alloys in the electronics industry has necessitated a comprehensive understanding of their manufacturing process and the structural integrity of solder joints under corrosive conditions. This study aims to investigate the manufacturing process and evaluate the structural integrity of corroded SAC305 lead-free solder. The research methodology involves a combination of experimental analysis and characterization techniques. The manufacturing process of SAC305 solder will be examined, focusing on parameters such as reflow profile and different heating techniques. Various characterization techniques, including scanning electron microscopy (SEM), and Vickers Hardness Test, will be employed to assess the microstructure and the hardness of the solder joints. The results from the wetting angle and spreading ratio for medium operating power such as M120s has a wetting angle and spreading ratio of 15.18° and 93.48° respectively, showed that it has higher wettability compared to high operating power such as H60s has a wetting angle and spreading ratio of 16.76° and 93.03°. To investigate the effects of corrosion on the structural integrity of SAC305 solder, accelerated corrosion tests will be conducted using appropriate corrosive environments. The solder joints will be subjected to controlled exposure to corrosive solution, such as 3.5%wt NaCl solution which simulating real-world operating conditions. The structural integrity of the corroded solder joints will be evaluated through characterization techniques such as scanning electron microscopy (SEM). The comparison between the corroded SAC305 and non-corroded SAC05 was investigated based on the results of the analysis. The findings of this study will contribute to enhancing the understanding of the manufacturing process of SAC305 solder and the effects of corrosion on its structural integrity. The results will assist in developing guidelines for optimized manufacturing practices and design considerations to mitigate corrosion-induced failures in lead-free solder joint
A study of thermal cooling solution for storage device
(2023-07-01)
Ahmad Syauqi bin Osman
A storage device is used in a computer or laptop to store the memory or to be the core of the computer. Over time, the storage device or frequently known as a chip can overheat thereby harming the entire components. To cool down the temperature, a cooling system needs to be used to ensure that the heat can be dispersed uniformly into the surroundings. A heat sink is used in this study as the thermal cooling solution that can dissipate heat from the chip hence cooling down the temperature of the chip. In this study, a Finite Volume Method (FVM) simulation from ANSYS Fluent will be utilized for the simulation of junction temperature reduction of the chip and the heat dispersion to the surroundings. Several parameters were used to improve heat dissipation in this simulation for example, the base area of the heat sink, the thickness of the base area, the number of fins, the height of the fins and the shape design of the heat sink. A temperature of 51.35ᵒC was recorded for the largest area of 50x50mm² while for the thickness of the base of 15mm, the resulting value would be 58.85ᵒC. For different variation of fins, 6 fins configuration for the heat exchanges recorded to have a temperature drop of 75.85ᵒC while for the height of fins of 50mm shows a drop in temperature by up to 49.46ᵒC. For the different shapes of the heat sink design, parallel and pin fin shapes recorded almost similar temperatures of 55.56ᵒC and 55.59ᵒC respectively. The lowest possible temperature will reach is up to 48.72ᵒC. This can accomplish the 50ᵒC handling chip comfortably requirement by combining the base thickness of 5mm, the heat sink's area of 30x30mm², the fin's height of 8mm with the thickness of 1mm for each fin, and the presence of 7 total fins.
A studying of piercing holes in sheet metal
(2002-03)
Akasyah bin Mohd Kathri
Piercing is ordinarily the Fastest method of making holes in steel sheet or strip and is generally the most economical method for medium-to-high production Pierced holes can be almost any size and shape. However, in very small holes such as 1/16 inch making, the conventional machining is not considerable. In this thesis, we will discuss about the technique of making holes using nontraditional machining such as electrical discharge machining, laser beam machining, electrostream drilling, and electrochemical jet machining. Nontraditional process drills small diameter holes and complex shape holes with higher production rate and economy, higher accuracy and dimensional. This thesis presents a mathematical model for determine the relationship between the machining rate and working condition of the method. This model describes a distribution electric field, current condition, machining rate, temperature rise (cause by heating) on the process performance, process capability and theoretical results is also presented.
A survey on the application of rp in malaysia industries
(2002-03-01)
Mahyuddin, Mohd Sukeri
I am doing final year project in title ‘A SURVEY ON THE APPLICATION OF RP IN MALAYSIA INDUSTRIES’. This survey is to learn and understanding, also to know briefly about the application technology RP in Malaysia industries like in manufacturing industries. Although rapid prototyping is still new in the world and Malaysia but it technology can increase capacity of production to the factory with the faster that other technology. This is a project planning for a method to make the project go better and successful, so the first thing is make a questionnaire to collect more data and information to the industries whom are application technology RP direct or indirect. So, after that I can make a decision based on the data. Finally, from the data also we will focus to one industries to sure that this technology is suitable or relevant to the industries when the factory apply the technology in their factory. After that, we can go through a detail research which on focus industry to know that technology relevant for their factory, this will focus in all the aspect like a type of rapid prototyping normally using, also in application rapid prototyping in the industry, then the benefits and the troubleshooting and last the future rapid prototyping in Malaysia industries.
Acoustic boosted green hydrogen production through water electrolysis
(2023-07-14)
Mohamad Saiyidullah bin Abu Bakar
In this thesis, the main objective was to improve the effectiveness to enhance production of hydrogen. To achieve this, various modifications were made, including adjusting the molar concentrations of NaOH and H2SO4, as well as changing the frequency, power, and temperature of the ultrasonic bath. While previous research has mainly focused on examining the effects of pH and temperature on electrolysis, this study aims to expand understanding by exploring the potential impact of additional factors. for the production of hydrogen gas by electrolysis. By looking at a broader range of variables, a more comprehensive analysis was conducted to identify any previously overlooked factors that could contribute to increased hydrogen production. The investigation yielded promising results, indicating that these additional factors do indeed play an important role in improving electrolysis. By meticulously monitoring the power consumption during electrolysis using the Arduino Mega, accurate data on the energy consumption associated with the process has been obtained. This information serves as a valuable metric for evaluating the effectiveness of the electrolysis setup. In addition, the amount of hydrogen gas produced is accurately recorded after each electrolysis session. This involves collecting various data points such as voltage, current, water temperature, salinity, and pH. To ensure data accuracy and reliability, specific Arduino coding has been implemented for each sensor, allowing accurate measurement and recording of relevant parameters. To facilitate data analysis, Coolterm software was used to seamlessly transfer recorded data from Arduino to Excel. This allows for a comprehensive analysis of the collected data, allowing in-depth exploration of the relationship between various factors and the resulting hydrogen gas production. Overall, this study has broadened our understanding of the factors that influence the electrolysis of hydrogen gas production. By looking at more variables and using meticulous data collection methods, we've gained valuable insights that ultimately lead to improvements in factor efficiency and effectiveness. cure in the destruction of hydrogen gas.
Action load on the rectangular tube foam , using finite element analysis method
(2002-03-01)
Jamal, Shahriman
This project is focused on the analyse the deformable behaviour of hollow tube when subjected to impractive loading. The value of impacted objected is depending on the impacted force that accord on the hollow tube. Quasi – static is produced when the impacted loading is accord on it. The tube is the hollow tube. It is made from mild steel. The model of the hollow tube is structured and drawn according to the dimension that had been given. The shape of the dimension is rectangle size, that is 101.6mm(0.1016m) long and 50.8mm(0.0508m)width. The thick of the hollow tube is 0.85mm(0.00085m) and the height of the hollow 305mm(0.305m). The model consists of 1578 nodes and 772 elements. Then, a different hollow tube is filled with one of the polymer, that is polyurethane. This kind of polymer can be frozen when it is pured into the hollow tube. Polyurethane is divided into difference of density. Although it has a difference of density but the element size is the same, that is 305mm (0.0305m). the model containing 53kg/m3 have 860 node and 421 element. The model of 80kg/m3 have 852 node and 415 element. The model 131kg/m3 having 850 node dan 414 element. Lastly, the model 182kg/m3 have 852 node dan 415 element. The process of modeling, meshing task and simulation process are done in the IDEAS. The structural performance is evaluated in the animation plotted. Graph load versus compression is plotted and the total of energy absorbed, also the average of load is can be known from the wide of the graph. Difference is studied between the result from the experiment and the result from Finite Element Analysis Method (FEAM). At the end of this report, several suggestion are stated for further investigation.
Adaptive finite element analysis of heat conduction in a heart pipe with wick structures_
(2008-04-01)
Teoh, Say Lai
Self-adaptive mesh and order approximation function in the finite element analysis tool helps to automatically refine, coarsen, or relocate a mesh and adjust the basis to acquire a solution having a specified accuracy in an optimal way. With proper utilization of this tool, it will improve the way of solving engincering problems by obtaining the desired solution with minimal effort. Simulation tasks on the steady state heat conduction model of modulated wick structure heat pipe is carried out to determine the performance of PolyDE, a stand-alone finite element analysis programme with self. adaptive mesh and element approximation orders developed at the Institute for Micro System Technology at Hamburg University of Technology. The performance of the different adaptive methods include p-sdapt. h-adapt and bp-adapt are tested. An optimal solution is achieved by h-adapt and hp-adapt method. The performance comparison with commercial package ANSYS& 9.0 was also been carried out to show the ability of the PolyDE programme to achieve an optimal solution which compatible with current commercialize developed finite clement analysis package. The simulation on both PolyDE and ANSYS& is cared out using h-adapt method. The starting condition of both simulations is adjusted to a merely similar condition which has a similar number of degrees of freedom and elements. The performance of PolyDE is found to be on par with the ANSYS# programme. The PolyDE programme shows an advantage on achieving a result with lower relative erfor compare to ANSYS? but record a longer computational timic.
Adaptive finite element analysis of heat conduction in a heat pipe with wick structures
(2008-04-01)
Teoh, Say Lai
Self-adaptive mesh and order approximation function in the finite element analysis tool helps to automatically refine, coarsen, or relocate a mesh and adjust the basis to acquire a solution having a specified accuracy in an optimal way. With proper utilization of this tool, it will improve the way of solving engineering problems by obtaining the desired solution with minimal effort. Simulation tasks on the steady state heat conduction model of modulated wick structure heat pipe is carried out to determine the performance of PolyDE, a stand-alone finite element analysis programme with self-adaptive mesh and element approximation orders developed at the Institute for Micro System Technology at Hamburg University of Technology. The performance of the different adaptive methods include p-adapt, h-adapt and hp-adapt are tested. An optimal solution is achieved by h-adapt and hp-adapt method. The performance comparison with commercial package ANSYS® 9.0 was also been carried out to show the ability of the PolyDE programme to achieve an optimal solution which compatible with current commercialize developed finite element analysis package. The simulation on both PolyDE and ANSYS® is carried out using h-adapt method. The starting condition of both simulations is adjusted to a merely similar condition which has a similar number of degrees of freedom and elements. The performance of PolyDE is found to be on par with the ANSY® programme. The PolyDE programme shows an advantage on achieving a result with lower relative error compare to ANSYS® but record a longer computational time.

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