摘要
针对功率模块引线键合部位在温度循环作用下的疲劳失效问题,对功率模块在温度循环作用下的疲劳寿命进行了研究,利用温度循环试验箱对3种不同封装材料的功率模块进行了温度循环实验。通过数值模拟,结合子模型技术,确定了引线键合的危险部位;并根据Coffin-Manson疲劳寿命预测理论,对上述引线键合界面进行了寿命预测。同时,基于内聚力模型和损伤演化理论提出了一套寿命预测方法,利用ABAQUS软件的用户自定义程序接口UEL,编制了相应的程序,对键合界面的疲劳寿命进行了预测。研究结果表明:两种寿命预测方法均具有一定的适应性,利用循环内聚力模型模拟能够得到与实验更吻合的结果,并且能再现键合界面的失效过程。
Aiming at the fatigue failure problem of the wire bonding parts of power module under thermal cycling,the fatigue life of power module under thermal cycling loading was studied,thermal cycling tests were carried out by using the power modules with three different packaging materials with the help of thermal cycling test chamber.Combining with the sub-model technique,the finite element simulation was conducted to determine the dangerous locations in the wire bonding parts and their life predictions was performed by using the CoffinManson fatigue life prediction theory.At the same time,based on the cohesive zone model and damage evolution theory,using of ABAQUS user-defined program interface UEL,a life prediction method was developed and the fatigue lives of the bonding interface were further predicted by using our own program.The results indicate that these two types of life prediction methods are both suitable for life prediction of wire bonding.The method of cyclic cohesive zone model can yield more matched results in comparison with the experiments and can reproduce the failure progress of wire bonding interfaces.
出处
《机电工程》
CAS
北大核心
2018年第1期73-78,共6页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金资助项目(51375448
51375447)
关键词
温度循环
引线键合
寿命预测
循环内聚力模型
thermal cycling
wire bonding
life prediction
cyclic cohesive zone mode
