摘要
建立基于固体力学的搅拌摩擦焊接三维欧拉模型,并与文献的试验结果和ALE模型计算结果进行对比,验证了模型的正确性。基于此模型,进一步研究搅拌头轴肩及搅拌针等部位对总扭矩的贡献,结果表明,搅拌头轴肩对总扭矩贡献最大,搅拌头针部底面对总扭矩贡献最小,且总扭矩随搅拌头转速的增加而减小。搅拌头针部与轴肩的热输入比在不同搅拌头转速下维持在0.42附近,保证了无轴肩搅拌摩擦焊接过程的顺利进行。
The 3D Eulerian model is established based on solid mechanics. The availability of the model is verified by comparing the computed results of ALE model with the results published in literatures. Based on this model, the contributions of the pin and the shoulder to the total torque are further studied. It is found that the contribution to the total torque from the shoulder is the largest and from the pin tip surface is the smallest. The total torque can be decreased with the increasing of the rotating speed. The ratio of the heat inputs from the pin and the shoulder keeps constant to be 0.42 in different rotating speeds. This can be the reason for the success of the no sho,lder friction stir welding_
出处
《塑性工程学报》
CAS
CSCD
北大核心
2014年第1期127-130,共4页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(11172057)
国家重点基础研究发展(973)计划资助项目(2011CB013401)
国家高技术研究发展(863)计划资助项目(2012AA050901)
中央高校基本科研业务费专项基金资助
教育部新世纪优秀人才支持计划资助
关键词
搅拌摩擦焊接
欧拉模型
扭矩
机械功率
friction stir welding
eulerian model
torque
mechanical power
