【作者】 黄文； 刘延雄； 夏源明；

【Author】 Huang Wen Liu Yanxiong and Xia Yuamning (Dept. of Modern Mechanics , USTC , Hefei Anhui, 230027 )

【机构】 中国科学技术大学近代力学系；

【摘要】 本文利用自行研制的旋转盘式冲击拉伸试验装置及其附属低温箱对单向玻璃纤维增强树脂基复合材料在温度范围为-120—20℃,应变率范围为300 l/s到1650l/s的冲击拉伸力学性能进行了试验研究,获得了材料在不同加载条件下的完整应力应变曲线。结果表明,GFRP是温度敏感材料,随着环境温度的降低,材料的弹性模量、拉伸强度相应提高,而失稳应变相应降低;GFRP同时也是应变率敏感材料,随着应变率的提高,材料的弹性模量、拉伸强度也相应提高,而失稳应变则随着应变率的提高呈阶段性变化,当应变率小于1100 l/s时,失稳应变随应变率的增加而增大,当应变率大于1300 l/s时,失稳应变随应变率的增加而减少,1100 l/s至1300 l/s是GFRP韧脆韧的转变区。更多还原

【Abstract】 Tensile impact test of GFRP have been performed in the strain raterange from -120-20℃, and in the strainraterange from3001/s-1650 1/s. Results show that the modulus and tensile strength of GFRP both decreased with temperature, while failure strain increased with temperature. Results also show that, GFRP is a rate sensitivity material. The modulus and strength increased with strain rate. And failure strain increased with strain rate in the strain rate range from 300 1/s-1300 1/s, while decreased as strain rate reaches 1300 1/s. It indicates that GFRP exhibits a transition from brittle to ductile, then to brittle.更多还原