Ultrasonic time-of-flight diffraction (TOFD) technique is a new successful one for detecting and sizing the discontinuities inweldedjoints.
超声衍射时差(tofd)法是焊缝超声检测和缺陷定量很有发展前景的新技术。
2
The J integral values in the vicinity of the crack tip inweldedjoints were numerically analyzed by using the plane stress elastic-plastic finite element method.
采用平面应力弹塑性有限元法研究了含有多部损伤的焊接接头裂纹尖端J积分的变化规律。
3
Harden tendency of steel, content and distribution of hydrogen inweldedjoints, restraint stress resistance of joints are three factors that leads to the cold cracks of the welded joints.