Publication: Numerical aided program for obtaining optimum combination of fibres, matrix and fiber volume fraction for aircraft applications
Loading...
Date
2009-04-01
Authors
Daungkil, Imee Lister
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Lamina or unidirectional composites properties can be determined experimentally from simple coupon tests. However due to substantial diversity of fiber and matrix properties, it is impractical to do testing for all available composite materials as testing is time consuming and costly since they are the functions of several design variables; the individual constituents of the composite material, fiber volume fraction, packing geometry, processing, etc.
Another approach is to develop an analytical mathematical modeling to predict unidirectional composites properties by using properties of the constituent materials through the procedures of micromechanical and macromechanics which can provide useful approximate values when test data are unavailable. By using such approach, the design variables can be manipulated to achieve required optimum mechanical properties unidirectional continuous fiber composites.
The purpose of this present study was to determine how both design variables fiber volume fraction and fiber orientation variations can produce optimum stiffness and strength properties by using analytical approach with the aid of numerical aided program.
A simplified graphical user interface, (GUI) based on the Matlab program has been developed to assist in performing comparisons between analytical results .The results were validated using experimental data from the literature. It was found that the analytical model agreed well with those of the experiment results. Different fiber orientation and fiber volume fraction were investigated in which the elastic constants and strength for unidirectional lamina and off-axis lamina were obtained.