基于连续损伤力学的铝车身涂层抗划伤能力

doi:10.13229/j.cnki.jdxbgxb20180419

吉林大学学报(工学版) ›› 2019, Vol. 49 ›› Issue (3): 829-835.doi: 10.13229/j.cnki.jdxbgxb20180419

基于连续损伤力学的铝车身涂层抗划伤能力

庄蔚敏¹(),王鹏跃¹,解东旋²,陈延红³

1. 吉林大学汽车仿真与控制国家重点实验室，长春 130022
2. 一汽?大众汽车有限公司，长春 130011
3. 帝国理工学院航空系，伦敦 SW7 2AZ 1

收稿日期:2018-05-02 出版日期:2019-05-01 发布日期:2019-07-12
作者简介:庄蔚敏(1970?)，女，教授，博士生导师.研究方向：车身结构设计与优化，有限元分析和金属成型技术.E?mail:zhuangwm@jlu.edu.cn
基金资助:
国家自然科学基金项目(51775227,51375201);吉林省省校共建计划专项项目(SXGJSF2017?2?1?5);吉林省科技发展计划项目(20170101130JC)

Scratch resistance of aluminum automotive coatings based on continuum damage mechanics

Wei⁃min ZHUANG¹(),Peng⁃yue WANG¹,Dong⁃xuan XIE²,Yan⁃hong CHEN³

1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China
2. FAW?Volkswagen Automotive Co. , Ltd. , Changchun 130011, China
3. Department of Aeronautics，Imperial College，London SW7 2AZ 1, England

Received:2018-05-02 Online:2019-05-01 Published:2019-07-12

摘要/Abstract

摘要：

开展了基于连续损伤力学(CDM)的涂层抗划伤能力仿真研究，建立了损伤力学材料模型。通过有限元软件ABAQUS提供的子程序(VUMAT)接口，将该材料模型嵌入到ABAQUS求解器。以裂纹横穿涂层的压头反力来衡量涂层的抗划伤能力，预测涂层抗划伤能力。研究发现：用所建立的自定义材料模型对涂层划伤进行分析，不仅可以得到涂层的应力分布，而且可以预测涂层在载荷作用下裂纹的产生和扩展趋势；涂层对划伤速度高的载荷具有更高的抵抗划伤能力，涂层厚度对涂层抗划伤能力也有一定影响；而基体材料性能和基体厚度对涂层抗划伤能力的影响很小，研究结论可以为涂层材料的优化设计提供理论支持。

关键词: 涂层材料, 连续损伤力学, 用户材料子程序, 抗划伤能力

Abstract:

Continuum Damage Mechanics (CDM) was introduced into the finite element analysis of scratch resistance of coatings. Firstly, a damage mechanics based on the material model was created. Secondly, this material model was implemented into ABAQUS solver through user defined subroutine VUMAT. Finally, a series of analyses were carried out to analyze the mechanical behavior of coatings. The material model could be used not only to capture the stress distribution of coatings, but also to predict the damage evolution of coatings under scratch loading. In addition, it is found that the loading speed and coating thickness have certain effects on scratch resistance, but the properties and thickness of substrate have little effect on it. The theoretical support was provided for the optimal design of the coating material.

Key words: surface coating material, continuum damage mechanics(CDM), user?defined material subroutine, scratch resistance of coating

中图分类号:

TQ630.7

庄蔚敏,王鹏跃,解东旋,陈延红. 基于连续损伤力学的铝车身涂层抗划伤能力[J]. 吉林大学学报(工学版), 2019, 49(3): 829-835.

Wei⁃min ZHUANG,Peng⁃yue WANG,Dong⁃xuan XIE,Yan⁃hong CHEN. Scratch resistance of aluminum automotive coatings based on continuum damage mechanics[J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(3): 829-835.

图/表 13

表1

拟合材料参数"

材料参数	AA5052	AA6061?T6	UL800实色漆涂层
密度/(g·cm^－1)	2.7	2.7	1.5
E/MPa	85710	70160	1821
$υ$	0.28	0.28	0.32
n₁	3.42	8	2.2
K/MPa	33.37	30	16.5
k/MPa	85.44	265	10
A₁	8.31	6	8
B/MPa	169.45	150.30	55
C	0.27	0.7	2.8
m	1.56	1	1.2
n₂	13.0	7.5	9

表1

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基于连续损伤力学的铝车身涂层抗划伤能力

Scratch resistance of aluminum automotive coatings based on continuum damage mechanics

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