| 摘要: |
| 以统一型粘塑性Anand本构方程为基础,采用非线性有限元方法研究了热循环试验过程中高低温端点温度、温度升降速率、高低温保持时间对Sn63Pb37焊点应力分布和塑性应变的影响,并结合基于塑性应变的疲劳寿命预测Coffin-Masson公式,分析了热循环试验效率与这些参数之间的关系,为建立优化的HALT(Highly accelerated life test)和其它可靠性热循环试验温度剖面图提供有价值的参考。 |
| 关键词: 热循环 粘塑性 焊点可靠性 热疲劳寿命 非线性有限元分析 |
| DOI： |
| 分类号: |
| 基金项目:国家预研基金资助项目 |
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| Analysis of sress-strain in soldered joints and optimization of temperature profile of HALT thermal cycling test |
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CHU Wei-Hua, CHEN Xun, TAO Jun-Yong, WANG Kao
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Research Institute of Mechatronics Engineering, College of Mechatronic Engineering and Automation, National University of Defense Technology, Changsha 410073
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| Abstract: |
| Based on the unified visco plastic An and constitutive equation,the nonlinear finite element method is applied to study the influence of the temperature range,the ramp and the length of a well time and holding time on stress distribution and plastic strain in Sn63Pb37 soldered joint.Also the plastic-strain-based Coffiin-Masson equation is used to analyze the thermal cycling test efficiency and relation of these parameters.The results provide valuable guidance to determine the most efficient temperature profile of the thermal cycling. |
| Key words: thermal cycling viscoplaticity soldered joint reliability thermal fatigue life nonlinear finite element analysis |
