碳纤维增强环氧树脂基复合材料圆管轴向压溃分层失效仿真

doi:10.3901/JME.2020.12.107

机械工程学报 ›› 2020, Vol. 56 ›› Issue (12): 107-115.doi: 10.3901/JME.2020.12.107

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碳纤维增强环氧树脂基复合材料圆管轴向压溃分层失效仿真

庄蔚敏, 刘洋, 刘西洋

吉林大学汽车仿真与控制国家重点实验室长春 130022

收稿日期:2019-11-05 修回日期:2020-03-05 出版日期:2020-06-20 发布日期:2020-07-14
通讯作者: 刘洋(通信作者),男,1994年出生,博士研究生。主要研究方向为车身结构轻量化设计。E-mail:l_yang18@mails.jlu.edu.cn
作者简介:庄蔚敏,女,1970年出生,博士,教授,博士研究生导师。主要研究方向为车身结构轻量化设计。E-mail:zhuangwm@jlu.edu.cn
基金资助:
国家重点研发计划（2016YF B0101601）、国家自然科学基金（51775227、51375201）和吉林省省校共建计划专项（SXGJSF2017-2-1-5）资助项目。

Simulation on Delamination Failure of Carbon Fiber Reinforced Epoxy Resin Composite Circular Tube under Axial Crushing

ZHUANG Weimin, LIU Yang, LIU Xiyang

State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022

Received:2019-11-05 Revised:2020-03-05 Online:2020-06-20 Published:2020-07-14

摘要/Abstract

摘要： 为了模拟单向碳纤维增强复合材料圆管的压溃失效形式及吸能特性，对圆管进行轴向压溃试验，获得圆管的压溃失效形式及压溃载荷-位移曲线。采用单层壳单元模型进行压溃仿真，确定MAT54材料模型中非试验可测量参数。建立多层壳单元模型，基于Tiebreak接触模拟分层失效，研究网格划分尺寸及壳单元层数对压溃失效形式的影响，通过与试验结果对比验证所建立模型的准确性。研究表明参数YCFAC和SOFT影响压溃载荷-位移曲线的峰值载荷和平均压溃载荷。网格尺寸和壳单元层数影响圆管的失效形式，网格尺寸越小，分层失效和基体开裂现象越明显。随着壳单元层数增加，初始峰值载荷呈递减趋势，所需计算时间呈指数型增长趋势。综合考虑计算成本和预测准确性，采用4层壳单元模型能够准确预测碳纤维圆管的轴向压溃性能和分层失效。

关键词: 碳纤维增强复合材料, 压溃仿真, 吸能特性, 分层失效

Abstract: In order to simulate the compression failure modes and energy absorption characteristics of unidirectional carbon fiber reinforced composite circular tube, the axial crushing tests are carried out to obtain the compression failure modes and the load-displacement curves. The crushing simulation of single shell layer model is carried out to determine the non-experimental measurable parameters in MAT54 material model. A multilayer shell layers models are established to simulate the delamination failure based on tiebreak contact. The effects of mesh size and shell layers on the compression failure mode are studied. The accuracy of the model is verified by comparing with the experimental results. The results show that the parameters YCFAC and SOFT affect the peak load and average crushing load of the load-displacement curve. The mesh size and the number of shell layers influence the failure modes of circular tubes. The smaller the mesh size, the more obvious the delamination failure and matrix cracking are. The initial peak load decreases with the increase of shell layers, and the calculation time increases exponentially. Considering the simulation cost and prediction accuracy, the four-layer shell model can accurately predict the axial crushing performance and delamination failure of carbon fiber composites circular tube.

Key words: carbon fiber reinforced composite, crushing simulation, energy absorption characteristics, delamination failure

中图分类号:

TB332

庄蔚敏, 刘洋, 刘西洋. 碳纤维增强环氧树脂基复合材料圆管轴向压溃分层失效仿真[J]. 机械工程学报, 2020, 56(12): 107-115.

ZHUANG Weimin, LIU Yang, LIU Xiyang. Simulation on Delamination Failure of Carbon Fiber Reinforced Epoxy Resin Composite Circular Tube under Axial Crushing[J]. Journal of Mechanical Engineering, 2020, 56(12): 107-115.

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碳纤维增强环氧树脂基复合材料圆管轴向压溃分层失效仿真

Simulation on Delamination Failure of Carbon Fiber Reinforced Epoxy Resin Composite Circular Tube under Axial Crushing

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