复合材料挖补修理固化过程残余应力的三维数值模拟

玻璃钢/复合材料 ›› 2016, Vol. 0 ›› Issue (8): 22-26.

复合材料挖补修理固化过程残余应力的三维数值模拟

庞杰, 刘国春

中国民用航空飞行学院航空工程学院,广汉618307

收稿日期:2016-04-22 出版日期:2016-08-28 发布日期:2016-08-28
作者简介:庞杰(1984-),男,硕士,讲师,主要从事复合材料成型工艺、飞机结构优化设计等方面的研究,nuaa_pj@163.com。
基金资助:
学院面上项目(XM1307);民航局科技创新引导资金项目(14015J0260149)

THREE-DIMENSIONAL NUMERICAL SIMULATION OF RESIDUAL STRESS FOR SCARF REPAIRED COMPOSITES DURING CURING PROCESS

PANG Jie, LIU Guo-chun

Aviation Engineering Institute, Civil Aviation Flight University, Guanghan 618307, China

Received:2016-04-22 Online:2016-08-28 Published:2016-08-28

摘要/Abstract

摘要： 基于热化学和残余应力理论,采用顺序热-力耦合方法建立了复合材料固化过程的三维有限元模型,通过与文献中C形构件计算结果的对比,验证了该仿真模型具有较高的精度。采用该模型计算了AS4/3501复合材料层合板挖补修理固化过程中模量和残余应力的变化历程。结果表明,凝胶点之前,树脂模量和复合材料横向模量很小,而平行于纤维方向存在残余压应力;凝胶点之后,模量均随时间快速增大到一定值,残余应力先逐渐增大到一定值,再随降温过程快速增大。

关键词: 复合材料, 挖补修理, 残余应力, 数值模拟

Abstract: Based on the thermochemical and residual stress theory, a three-dimensional finite element model of composite was developed during the curing process by coupled thermos-mechanical method. The accuracy of the simulation model is verified by comparing with the literature results of C-shape part. Based on the model, modulus and residual stress variation of the scarf repaired AS4/3501 composite laminate were calculated during the curing process. The results indicate that the modulus of resin and composite perpendicular to the fiber is very small before gelation point, residual stress existes in the direction of fiber. After gelation point, modulus increases to constant valve with the curing time quickly, and residual stress develops gradually, then increases quickly during the cooldown phase.

Key words: composite, scarf repair, residual stress, numerical simulation

中图分类号:

TB332

庞杰, 刘国春. 复合材料挖补修理固化过程残余应力的三维数值模拟[J]. 玻璃钢/复合材料, 2016, 0(8): 22-26.

PANG Jie, LIU Guo-chun. THREE-DIMENSIONAL NUMERICAL SIMULATION OF RESIDUAL STRESS FOR SCARF REPAIRED COMPOSITES DURING CURING PROCESS[J]. Fiber Reinforced Plastics/Composites, 2016, 0(8): 22-26.

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