Using micro-mechanical modelling to predict short-fibre composite properties in computer-aided design of sporting equipment |
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Authors: | Paul Ewart Johan Verbeek |
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Institution: | (1) School of Engineering, University of Waikato, Hamilton, New Zealand; |
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Abstract: | Computer-aided design (CAD) of sporting equipment requires knowledge of the mechanical properties of proposed materials. The
mechanical properties of composite materials are often not as simple to obtain as those of conventional materials, in which
case micro-mechanical modelling could be used in conjunction with CAD software. A micro-mechanical model was used to predict
the flexural modulus of composite materials, based on the assumption of partial interfacial adhesion between composite components.
It was found that the partial adhesion model was both practical and consistently accurate. The partial adhesion model accounted
for adhesion between components by considering an ‘effective shear value’ at the interface. The model was compared to experimental
data for glass, wood and carbon-fibre reinforced polyethylene. It was shown that the adhesion coefficient ranged between 0.1
for carbon fibre, 0.5 for glass fibre and 0.8 for the wood fibre composites. It was shown that using micro-mechanical modelling
to predict composite mechanical properties, as opposed to simulating the comprehensive composites structure, computer processing
time and file size can be reduced with little compromise in simulation accuracy. |
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