基于MSC.Marc的摩擦叠焊面接触问题数值模拟  

Numerical Simulation on the Surface-Contact Problem of Friction-Stitch-Welding Based on MSC.Marc

作　　者：陈家庆[1] 焦向东[1] 邱宗义[1] 张宝生[1] 陈忠海[1] 

机构地区：[1]北京石油化工学院海洋工程连接技术研究中心,北京102617

出　　处：《石油化工高等学校学报》2008年第4期68-72,77,共6页Journal of Petrochemical Universities

基　　金：国家自然科学基金项目(50675022);国家863计划海洋技术领域2006年度专题课题(2006AA09Z329);2007年度北京市自然科学基金项目(3073017)

摘　　要：选用刚性平冲头与弹性半空间的经典面接触模型为研究对象,通过解析解与MSC.Marc有限元数值模拟结果的比较,确定了偏斜网格以及3级有限元计算对已知接触区域面接触问题的可靠性。对于摩擦叠焊单元成形过程所涉及的基本弹性静力学面接触问题而言,接触面上的法向应力分布从中心向边缘以二次曲线的形式逐渐增大;金属棒直径、轴向外载荷对接触面上法向应力的分布情况影响较大,而径向间隙、不同材料组合对其的影响相对较小。Taking the surface--contact model between rigid flat punch and elastic half--space as the research subject, and through comparing the results of analytical solution and numerical simulation by the finite element method （FEM） software MSC. Marc, it is determined that the non--uniform meshing method and the third grade FEM calculation are reliable as to the surface--contact problem with definite contact area. For the most fundamental surface--contact problem involved with friction hydro pillar processing in friction stitch welding, the normal stress on the contact surface increases quadratically from center to the marginal side. The diameter of the metal stud and the applied external load has more influence to the distribution of normal stress on the contact surface, while the influence of radial clearance, the material combination between the metal stud and the predrilled hole are relatively small.

关 键 词：面接触 有限元 摩擦液柱成形 弹性静力学 

分 类 号：TG404[金属学及工艺—焊接] TB115[理学—数学]