应变率效应对短纤维增强热塑性树脂PPS力学性能的影响

STRAIN RATE EFFECT ON THE MECHANICAL PROPERTIES OF SHORT FIBRE REINFORCED THERMOPLASTIC PPS

本文通过大量的实验，研究了应变率效应对短纤维增强热塑性树脂ＰＰＳ（聚苯硫醚）力学性能的影响，应变率变化范围从１０－４／ｓ～１０２／ｓ。并对断口形貌及破坏形式进行了观察。研究结果表明：应变率较高时对材料的强度和模量有明显影响，而且应变率不同断口形貌也存在一定的差别。断口形貌呈脆性破坏。

The compression and tension mechanical behaviors of short fibre reinforced composite material PPS(Polyphenylene sulfide) over a wide range of strain rates covering six orders of magnitude are described. The fracture appearance and the cross section of tested specimens were observed. The results show that the strength and Youngs modulus of the short fiber reinforced thermoplastic PPS increase with increasing strain rates and reveal that the fracture of short fibre reinforced PPS exhibits brittle behavior. The results indicate that the strain rate effect is remarkable.