7075铝合金搅拌摩擦焊接头温度场及残余应力场的有限元模拟
发布时间：2018-09-03 20:19
【摘要】：根据搅拌摩擦焊特点及库伦摩擦做功理论,以厚度为6 mm的7075-T7351铝合金板材为研究对象,基于ANSYS有限元软件,建立了搅拌摩擦焊双热源三维有限元模型,研究不同转速、焊接速度对温度场及残余应力场的影响规律.结果表明,焊接过程峰值温度在500℃左右,接头最高温度出现在搅拌头后部大约5 mm处;接头残余应力以纵向残余应力为主,在垂直焊缝方向上呈M形分布,最大值约为150 MPa;当搅拌头转速一定时,随着焊接速度的增大,峰值温度减小,峰值纵向残余应力增大;当焊接速度一定时,温度随着转速的增大而增大,且转速越大,纵向残余应力分布越均匀.
[Abstract]:According to the characteristics of friction stir welding and Coulomb's theory of friction work, taking 7075-T7351 aluminum alloy sheet with thickness of 6 mm as the research object, based on ANSYS finite element software, a three-dimensional finite element model of double heat source for friction stir welding is established, and different rotational speeds are studied. The influence of welding speed on temperature field and residual stress field. The results show that the peak temperature of welding process is about 500 鈩，
本文编号：2221061
[Abstract]:According to the characteristics of friction stir welding and Coulomb's theory of friction work, taking 7075-T7351 aluminum alloy sheet with thickness of 6 mm as the research object, based on ANSYS finite element software, a three-dimensional finite element model of double heat source for friction stir welding is established, and different rotational speeds are studied. The influence of welding speed on temperature field and residual stress field. The results show that the peak temperature of welding process is about 500 鈩，
本文编号：2221061
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