搅拌摩擦焊接全过程热力耦合有限元模型

材料工程, 2014, (12): 11-17. doi: 10.11868/j.issn.1001-4381.2014.12.002

搅拌摩擦焊接全过程热力耦合有限元模型

崔俊华 ^1, , 柯黎明 ^2, , 刘文龙 ^3, , 郭正华 ^4, , 赵刚要 ^5, , 方平 ^6,

1.西北工业大学材料学院摩擦焊接陕西省重点实验室,西安710072;南昌航空大学轻合金加工科学与技术国防重点学科实验室,南昌330063

2.西北工业大学材料学院摩擦焊接陕西省重点实验室,西安710072;南昌航空大学轻合金加工科学与技术国防重点学科实验室,南昌330063

3.南昌航空大学轻合金加工科学与技术国防重点学科实验室,南昌,330063

4.南昌航空大学轻合金加工科学与技术国防重点学科实验室,南昌,330063

5.南昌航空大学轻合金加工科学与技术国防重点学科实验室,南昌,330063

6.南昌航空大学轻合金加工科学与技术国防重点学科实验室,南昌,330063

基金项目: 国家自然科学基金资助项目(51265043) 轻合金加工科学与技术国防重点学科实验室开放基金资助项目(gf200901003,gf201001005) 航空科学基金资助项目(2010ZE56018)

关键词：搅拌摩擦焊接 , 全过程 , 有限元模型 , 温度场 , 塑性变形场

Thermo-mechanical Coupled Finite Element Model for Whole Process of Friction Stir Welding

Keywords： friction stir welding , whole process , finite element model , temperature field , plastic deformation field

利用ALE网格自适应技术及相应边界条件处理,建立搅拌摩擦焊接全过程(下压阶段和稳定焊接阶段)热力耦合有限元模型.采用6061铝合金焊件验证模型.结果表明:整个焊接过程温度场最高温度在463℃左右,低于材料熔点;稳定焊接6s后,焊件后方横截面上等效塑性应变区近似呈“V”形分布,前进边侧变形程度较返回边侧剧烈,变形范围更大.

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