第 卷第 期
吉 林 大 学 学 报 工 学 版
VolNo
年 月
Journal of Jilin University Engineering and Technology Edition
July
收稿日期
基金项目欧盟第七研发框架项目CPFP MS国家自然科学基金项目
作者简介庄蔚敏 女教授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
Emailzhuangwmjlueducn
基 于 连 续 损 伤 力 学 的 表 面 涂 层 损 伤 模 拟
庄蔚敏陈延红
吉林大学 汽车仿真与控制国家重点实验室长春
摘 要针对传统宏观力学研究涂层问题的局限性开展了基于损伤力学的表面涂层有限元模
拟方法研究 首先建立损伤力学材料模型然后通过有限元软件 ABAQUS 提供的子程序VU
MAT接口将该材料模型嵌入到 ABAQUS 求解器最后对涂层进行数值模拟以分析涂层的力
学性能 用该材料模型分析不仅可以得到涂层的应力分布而且可以得到涂层在载荷作用下
的损伤过程 通过研究反力与涂层厚度的关系提出用裂纹穿透涂层时的反力来衡量涂层的
承载能力 此外还可以根据在一定载荷作用下涂层厚度与裂纹深度的关系得到涂层的临界
厚度进而为涂层厚度设计提供参考
关键词 固体力学机械工程表面涂层损伤力学损伤预测用户材料子程序
中图分类号O文献标志码A文章编号
Simulation of surface coating failur e based on continuum damage mechanic s
ZHUANG WeiminCHEN Yanhong
State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China
Abstra ctIn view of the limitations of traditional macromechanics in the surface coating study the continuum
damage mechanicsCDM was introduced into the finite element analysis of the surface coatingA material
model was built based on CDM and it was embedded in the solver of the software ABAQUS through the user
defined subroutine VUMAT of ABAQUS as the interfaceA series of numerical simulations were carried out to
analyze the mechanical behavior of the coatingBy means of the proposed model not only the stress distribution
in the coating could be obtained but also the damage evolution of the coating under loading could be
predictedBy studying the relationship between the reaction force and the coating thickness a concept of a
special reaction force corresponding to the crack penetrating the coating thickness was proposed to evaluate the
load carrying capacity of the coatingBesidesa critical thickness derived from the relationship between the
coating thickness and the crack depth as a reference for coating thickness design
Key wordssolid state mechanics mechanical engineering surface coating continuum damage mechanics
failure prediction userdefined material subroutine