There is a lot of burr at the hole of self-piercing riveting joint,so it is easy to enlarge the crack growth at this hole.

• 自冲铆接疲劳裂纹的扩展是决定整个疲劳寿命的重要组成部分,特别是对于自冲铆接这样有冲孔缺陷的连接结构来说,裂纹扩展寿命更为重要。