预制孔形状对摩擦叠焊单元成形影响的数值分析  

Numerical Analysis on Impact of Prefabricated Hole Shape to FHPP

作　　者：李冠群[1,2] 高辉[2] 周灿丰[2] 曹军[3] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124 [2]北京石油化工学院能源工程先进连接技术北京市工程研究中心,北京102600 [3]海洋石油工程股份有限公司,天津300451

出　　处：《热加工工艺》2014年第21期149-151,共3页Hot Working Technology

基　　金：国家高技术研究发展计划(863计划)资助项目(2011AA090302);国家自然科学基金资助项目(51109005);北京市自然科学基金资助项目(3122016);北京市教育委员会科技计划资助项目(KM201310017007)

摘　　要：对两种预制孔形状的摩擦叠焊单元成形过程进行数值仿真分析,得到完整的包含大变形塑性变形的焊接过程结果。分析得到,由于圆锥形预制孔在焊接过程中接触面压力均匀,而圆柱形预制孔在塑性材料与侧壁接触面上没有压力,所以圆锥形预制孔得到的温度场与应力场较圆柱形预制孔分布均匀,从而影响焊接接头的结合强度。通过拉伸试验与仿真结果进行对比,结果吻合。For two kinds of prefabricated hole shape,the numerical simulation analysis of FHPP was processed. The complete welding process results consists of the large plastic deformation were gotten. The conical prefabricated hole can get uniform contact pressure in the contact surface through the process of welding, and the cylindrical prefabricated hole has no pressure between the surface of the shaping material and the hole wall, so comparing with the cylindrical prefabricated hole, the conical prefabricated hole will get more uniform distribution of temperature field and stress field. The result will affect the bonding strength of the weld which will be validated through tensile test.

关 键 词：预制孔形状 摩擦叠焊单元成形 数值分析 

分 类 号：TG453.9[金属学及工艺—焊接] TG404