北京航空航天大学学报 ›› 2014, Vol. 40 ›› Issue (11): 1555-1562.doi: 10.13700/j.bh.1001-5965.2013.0681

• 论文 • 上一篇    下一篇

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   

  1. 北京航空航天大学 航空科学与工程学院, 北京 100191
  • 收稿日期:2013-11-26 出版日期:2014-11-20 发布日期:2014-12-02
  • 作者简介:康军(1986-),男,四川内江人,博士生,kangjun@ase.buaa.edu.cn.
  • 基金资助:

    国家973计划资助项目(2010CB631103)

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

Kang Jun, Guan Zhidong, Li Zengshan, Li Xing   

  1. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2013-11-26 Online:2014-11-20 Published:2014-12-02

关键词: 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.

Key words: composite material, strain invariant failure theory, accelerated testing methodology, time-temperature superposition principle, long-term strength

中图分类号: 


版权所有 © 《北京航空航天大学学报》编辑部
通讯地址:北京市海淀区学院路37号 北京航空航天大学学报编辑部 邮编:100191 E-mail:jbuaa@buaa.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发