Static And Dynamic Mechanical Properties And Strain Rate Sensitivity Of Thermoplastic Based Polymers And Composites Using Split Hopkinson Pressure Bar Apparatus

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dc.contributor.authorOmar, Mohd Firdaus
dc.date.accessioned2019-01-09T03:42:00Z
dc.date.available2019-01-09T03:42:00Z
dc.date.issued2013-04
dc.description.abstractIn this study, an experimental technique, based on the compression Split Hopkinson Pressure Bar (SHPB), was introduced to perform dynamic compression testing whereas a conventional universal testing machine was used to perform static compression testing. These two techniques were used to experimentally investigate the interactive effect of strain rates towards the compressive properties of various thermoplastic-based materials. All of the thermoplastic-based materials used in this study were fabricated using a hot press process. The SHPB results were initially verified and calibrated. The results indicated that all tested thermoplastic specimens (i.e. PP, PE, and PC) showed a great dependency on the strain rate applied; where the yield stress, compression modulus, and compressive strength, were all proportionally increased as the strain rate was increased. Interestingly, both Eyring and basic power law equations were almost agreed with the experimental results over a wide range of strain rates investigated. The effect of molecular structure, on the static and dynamic mechanical properties of thermoplastic polymer, was also determined using polyethylene specimens with different molecular structures (i.e. LDPE, LLDPE, and HDPE). The results indicated that the molecular structure of polyethylene did affect its mechanical properties in terms of yield behaviour, stiffness, strength, rate sensitivity, activation volume, and absorbed energy. For thermoplastic based reinforced composites, two types of particulate fillers were added into the polypropylene matrix namely zinc oxide and mica.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/7510
dc.language.isoenen_US
dc.publisherUniversiti Sains Malaysiaen_US
dc.subjectThermoplastic Based Polymers And Compositesen_US
dc.subjectSplit Hopkinson Pressure Bar Apparatusen_US
dc.titleStatic And Dynamic Mechanical Properties And Strain Rate Sensitivity Of Thermoplastic Based Polymers And Composites Using Split Hopkinson Pressure Bar Apparatusen_US
dc.typeThesisen_US
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