摘要
选择两种铺设方式（[（45／-45）t]s和[（0／45／90／-45）z]s）的T300／Epoxy（炭纤维／环氧树脂）层合板，利用MTS试验机以及Hopkinson拉伸杆分别对其进行了准静态拉伸试验（应变率为10^-5～10^-4s^-1）、中应变率拉伸试验（应变率为10°～10^3s^-1）和高速冲击拉伸试验（应变率为10^2～10^4s^-1）。静态、动态实验的试件形状及尺寸均相同。获得了不同应变率加载条件下T300／Epoxy的应力-应变曲线。基于所获得的应力-应变曲线，讨论了应变率对炭纤维增强复合材料力学性能的影响。研究结果表明：复合材料T300／Epoxy是应变率相关的材料；层合板的铺设方向对其应变率效应有着显著的影响；随着应变率的增加，材料的强度及弹性模量有较大程度的提高，但破坏应变有所降低。通过对试验结果的数据拟合，提出了材料应变率相关的动态本构模型。
The strain rate dependent behavior of T300 carbon/epoxy matrix composite in tension was studied by testing two kinds of laminates E（45/-45）43s and E（0/45/90/-45）2]s at different rates. The tensile test was carried out on an MTS machine at the quasi-static strain rates of approximately 10^-5 -10^-4 s^-1 and the intermediate strain rates of about 10°-10^1s^-1. The tensile high strain rate test was conducted with the tensile split Hopkinson bar technique at strain rates of approximately 10^2 -10^4 s^-1. The specimens with identical geometry were used in all the tests. The dynamic stress-strain plot was obtained and compared with the quasi-static tensile test result. The results of the study indicate that Carbon/Epoxy composites are strain rate dependent materials. The stacking sequence has a significant effect on the material response. The tensile strength of the composites increases with increasing the strain rate, and the failure strain decreases when the strain rate increases. A constitutive model for characterizing the strain rate dependent behavior of T300/Epoxy composites was derived by simulating the experimental data.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2007年第2期113-119,共7页
Acta Materiae Compositae Sinica
基金
国家自然科学基金航空联合资助项目(10377010)
作者简介
通讯作者：赵桂平，教授，主要从事复合材料动态性能方面的研究；会员登记号：E63090016HY E-mail：zhaogp@mail．xjtu．edu．cn
