Stress concentration zones caused by welding cracks are the most dangerous weak-links in service processes of welding works,so an effective safety evaluation of the links is of great importance.

• 焊接裂纹产生的应力集中区是焊接构件在服役过程中最为危险的一个薄弱环节,对这个环节进行有效的安全评估,具有重要意义。