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Strain Rate Dependent Behaviour of Self-Reinforced Polypropylene Composites and their Hybrids

机译：自增强聚丙烯复合材料及其杂种的应变率依赖性行为

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Strain rate is one of the external parameters to affect the behaviour and response of polymer composites due to their viscoelastic properties. Therefore, understanding the strain rate effect on the materials’ properties is crucial. The current work demonstrates the strain-rate sensitivity of self-reinforced polypropylene composites (SRPP) and their interply hybrids with glass fibre in bending loading. Hybridisation of SRPP with the glass reinforcement changes the strain-rate dependence behaviour. It was concluded that increasing strain-rate resulted in increasing both the strength and the modulus of the structures but the modulus dependence on strain-rate was less pronounced. For self-reinforced hybrid composites, a yield point was observed in the stress-strain flexural curve where the low strain failure glass laminate fails. The failure strain of GRPP, as well as maximum flexural strength, showed an increase by increasing the strain-rate.
机译：应变速率是影响聚合物复合材料由于其粘弹性的性质的行为和响应之一。因此，理解对材料的菌株效应是至关重要的。目前的工作证明了自增强聚丙烯复合材料（SRPP）的应变速率敏感性及其在弯曲负载中具有玻璃纤维的络合杂交体。具有玻璃增强件的SRPP的杂交改变了应变率依赖性行为。得出结论：增加应变率导致结构的强度和模量增加，但模量依赖于应变率不太明显。对于自增强的混合复合材料，在低应变失效玻璃层压材料的应力 - 应变弯曲曲线中观察到屈服点。通过增加应变速率，GRPP的失效应变以及最大弯曲强度表现出增加。

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