含分层损伤的复合材料层压板后屈曲及低周疲劳分层扩展有限元模拟研究

玻璃钢/复合材料 ›› 2018, Vol. 0 ›› Issue (6): 39-43.

含分层损伤的复合材料层压板后屈曲及低周疲劳分层扩展有限元模拟研究

杜洪雨, 奚晓波, 孟力华, 董晓莉

中航沈飞民用飞机有限责任公司工程研发中心,沈阳110013

收稿日期:2017-12-01 出版日期:2018-06-28 发布日期:2018-06-28
作者简介:杜洪雨(1982-),男,工程师,硕士,主要从事飞机结构设计及复合材料结构方面的研究,du.hongyu@sacc.com.cn。

FINITE ELEMENT ANALYSIS OF POST-BUCKLED DELAMINATION OF COMPOSITE LAMINATEWITH PRELIMINARY DEBOND SUBJECTED TO STATIC AND FATIGUE LOADS

DU Hong-yu, XI Xiao-bo, MENG Li-hua, DONG Xiao-li

AVIC SAC Commercial Aircraft Co., LTD., Shenyang 110013, China

Received:2017-12-01 Online:2018-06-28 Published:2018-06-28

摘要/Abstract

摘要： 基于Abaqus软件建立3D层压板有限元模型,采用虚拟裂纹扩展技术(Virtual Crack Closure Technology,简称“VCCT”)模拟分层界面。为接近真实物理模型,引入几何扰动。以含圆形分层区的层压板为研究对象,进行非线性后屈曲分层模拟。根据后屈曲分层扩展分析结果,以Paris模拟疲劳分层的萌生及扩展,研究复合材料低周疲劳特性。

关键词: 复合材料层压板, 虚拟裂纹闭合技术(VCCT), 后屈曲, 分层扩展, 低周疲劳

Abstract: A three-dimensional (3D) model of composite laminate was developed, and Virtual Crack Closure Technology (VCCT) was employed to simulate the interaction of laminate debond interface. In order to approach the realistic situation, the initial geometrical imperfection was introduced before analysis. A laminate, embedded with a circle preliminary delamination, was selected as a researh object to predict the post-buckled delimination growth along predefined debond interface. Based on the simulation result from non-lineary postbuckling analysis, low-cycle fatigue simulations were then performed with Paris law as criteria, and the prediction of fatigue delamination onset and propagation was accomplished. According to the FE analysis results, it was deduced that the onset and growth of fatigue delamination were affected by the out-of-plane displacement of thicker component for preliminary debond laminate. Furthermore, compared with axis displacement applied for crack propagation, it was also shown that the axial displacement for the fatigue analysis was much bigger.

Key words: composite laminate, VCCT (Virtual Crack Closure Technology), postbuckling, delamination, low-cycle fatigue

中图分类号:

TB332

杜洪雨, 奚晓波, 孟力华, 董晓莉. 含分层损伤的复合材料层压板后屈曲及低周疲劳分层扩展有限元模拟研究[J]. 玻璃钢/复合材料, 2018, 0(6): 39-43.

DU Hong-yu, XI Xiao-bo, MENG Li-hua, DONG Xiao-li. FINITE ELEMENT ANALYSIS OF POST-BUCKLED DELAMINATION OF COMPOSITE LAMINATEWITH PRELIMINARY DEBOND SUBJECTED TO STATIC AND FATIGUE LOADS[J]. Fiber Reinforced Plastics/Composites, 2018, 0(6): 39-43.

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