复合材料开孔层压板压缩长期强度预测

康军; 关志东; 黎增山; 李星

doi:10.13700/j.bh.1001-5965.2013.0681

复合材料开孔层压板压缩长期强度预测

doi: 10.13700/j.bh.1001-5965.2013.0681

北京航空航天大学航空科学与工程学院, 北京 100191

基金项目: 国家973计划资助项目(2010CB631103)

详细信息

作者简介:
康军(1986-),男,四川内江人,博士生,kangjun@ase.buaa.edu.cn.

中图分类号: V257;TB33
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- 被引次数: 0
出版历程
- 收稿日期: 2013-11-26
- 网络出版日期: 2014-11-20

Long-term open-hole compression strength prediction of composite laminates

School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 加速试验方法(ATM,Accelerated Testing Methodology)基于复合材料基体的黏弹性特性,根据时间-温度叠加原理,用较高温度下的短期强度预测较低温度下的长期强度.对应变不变量失效理论(SIFT,Strain Invariant Failure Theory)进行改进,采用微观的最大应变准则判断纤维的拉伸和压缩失效.通过基体动态力学分析(DMA,Dynamic Mechanical Analysis)试验得到基体的储能模量控制曲线和时间-温度平移因子.通过不同温度下单向板拉伸、压缩试验得到破坏应变,根据时间-温度叠加原理采用基体的时间温度平移因子,构建SIFT临界值的控制曲线.采用应变不变量失效理论和加速试验方法(SIFT/ATM)结合渐进损伤分析,对准各向同性开孔板压缩长期强度进行了预测,并对破坏过程进行了模拟,分析了纤维和基体的失效过程.计算与试验结果吻合较好,证明了该方法的适用性.
- 复合材料 /
- 应变不变量 /
- 加速试验方法 /
- 时间-温度叠加原理 /
- 长期强度
Abstract: Accelerated testing methodology (ATM) predicts long-term strength in low temperature with short-term in high temperature, which is based on the viscoelasticity of matrix and the time-temperature superposition principle (TTSP). The strain invariant failure theory (SIFT) was modified by using micro maximum strain criteria to judge fiber tensile and compressive failure. Master curve of storage modulus of epoxy resin and the time-temperature shift factors were tested from dynamic mechanical analysis(DMA). Master curves of SIFT critical parameters were constructed by tension and compression test for unidirectional carbon fiber reinforced plastics (CFRP) under various temperatures with the time-temperature shift factors of matrix resin. Long-term compression strength of open-hole composite laminates was predicted based on SIFT/ATM combined method. The damage process of fiber and matrix was simulated by progressive damage analysis as well. Good agreement between numerical results and experiments was observed, which demonstrates the applicability of this method.
- composite material /
- strain invariant failure theory /
- accelerated testing methodology /
- time-temperature superposition principle /
- long-term strength

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参考文献(15)

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