ULTRASONIC EVALUATION OF SPOT WELD QUALITY.

被引：0
|
作者：
Rokhlin, S.I. [1 ]
Adler, L. [1 ]
机构：
[1] Ben Gurion Univ of the Negev,, Materials Engineering Dep,, Beersheva, Isr, Ben Gurion Univ of the Negev, Materials Engineering Dep, Beersheva, Isr
来源：
Welding Journal (Miami, Fla) | 1985年 / 64卷 / 07期
关键词：
FRACTURE MECHANICS - Applications - ULTRASONIC APPLICATIONS;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A novel ultrasonic method for evaluation of shear strength of a spot weld is based on an analytical expression which relates the transmission coefficient of Lamb waves passing through a spot weld nugget to the nugget diameter. The use of an ultrasonic spectroscopic method for determining nugget size is also discussed. A fracture mechanics model is introduced to correlate fracture load to the nugget dimension. This model predicts that failure load is proportional to the squared nugget diameter. While the model is valid only when the weld fails through the nugget, the proportionality of the failure load to the square of the diameter holds also when failure occurs in the base metal.
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