(1. 哈爾濱工業(yè)大學(xué) 現(xiàn)代焊接生產(chǎn)技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室, 哈爾濱 150001;
2. 信息產(chǎn)業(yè)部電子五所, 廣州 510610;
3. 中國(guó)科學(xué)院 上海冶金研究所, 上海 200050)
摘 要: 采用有限元數(shù)值模擬方法研究了冷卻過(guò)程在Al-Al2O3異種材料結(jié)構(gòu)件釬縫處導(dǎo)致的剪切應(yīng)力分布。計(jì)算結(jié)果表明:最大剪切應(yīng)力位于釬縫圓角處和靠近釬縫圓角的Al2O3陶瓷/Cu鍍層金屬界面處,同時(shí)中間層合金的熱膨脹系數(shù)與Al的熱膨脹系數(shù)相匹配時(shí),可以最大限度減小剪切應(yīng)力。
關(guān)鍵字: 有限元; 數(shù)值模擬; AlAl2O3釬焊; 剪切應(yīng)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


