本论文针对铝合金车体部件(端底架)进行静强度试验及疲劳试验的研究,试验数据表明在所试验的工况下,端底架搅拌摩擦焊焊缝各测试点的应力均未超过所用材料的屈服极限,卸除载荷后也没有发生永久变形,并经探伤焊缝表面及内部均无明显缺陷,从而证明搅拌摩擦焊技术可适用于车体关键部件的焊接。 In this paper, the static strength test and fatigue test of aluminum alloy body parts (end chassis) are studied. The experimental data show that under the tested conditions, the stress of each test point of friction stir weld of end chassis is not over The yield limit of the materials used, permanent deformation did not occur after the load was removed, and no obvious defects were found on the surface and inside of the weld by the test, which proves that the friction stir welding technology can be applied to the welding of the key components of the vehicle body.