(1. 哈尔滨工业大学 现代焊接生产技术国家重点实验室, 哈尔滨 150001;
2. 信息产业部电子五所, 广州 510610;
3. 中国科学院 上海冶金研究所, 上海 200050)
摘 要: 采用有限元数值模拟方法研究了冷却过程在Al-Al2O3异种材料结构件钎缝处导致的剪切应力分布。计算结果表明:最大剪切应力位于钎缝圆角处和靠近钎缝圆角的Al2O3陶瓷/Cu镀层金属界面处,同时中间层合金的热膨胀系数与Al的热膨胀系数相匹配时,可以最大限度减小剪切应力。
关键字: 有限元; 数值模拟; AlAl2O3钎焊; 剪切应力
soldering assembly and thermal expansion matching
(1. State Key Laboratory of Welding, Harbin Institute of Technology,
Harbin 150001, P.R.China;
2. Electronics 5th Research Institute of Ministry of Information,
Guangzhou510610, P.R.China;
3. Shanghai Institute of Metallurgy, Chinese Academy of
Sciences, Shanghai 200050, P.R.China)
Abstract:By means of finite element numerical simulation,the shear stress distribution in the fillet of AlAl2O3 soldering assembly was analyzed. The calculating results show that the maximum level of shear stress occurrs at thesoldering fillet and the interface near the soldering fillet between Al2O3ceramics and coated Cu. Meanwhile, in order to limit the shear stress as small as possible, the thermal expansion coefficient of interlayer alloy should match with the Al base metal.
Key words: finite element; numerical simulation; Al-Al2O3 soldering; shear stress