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Title of Journal: Exp Mech

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Abbravation: Experimental Mechanics

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Springer US

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DOI

10.1002/mc.2940120101

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1741-2765

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Dynamic Separation of Resistance Spot Welded Joint

Authors: K Wang Y J Chao X Zhu K W Miller
Publish Date: 2009/08/25
Volume: 50, Issue: 7, Pages: 901-913
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Abstract

The ultimate strength of resistance spot welded joints fabricated from a wide range of steel grades weld button size and sheet thickness are reported for lapshear and crosstension specimens subjected to quasistatic and impact loading conditions Test data are analyzed with respect to energy impact speed and loading rate Loading rate is identified as a critical test system independent parameter to reflect the strain rate sensitivity of the steels An equation is fitted to the ultimate strength test data as a function of loading rate which is proposed to predict the separation of spot welded joint under dynamic loading The model is validated by test data from open literature generated from other type of specimens and/or dynamic test conditionsThe authors wish to thank former students from this group Dr Shu Liu Dr Yil Kim and Mr Rishi Gaddam who provided much needed help in preparing the test samples welding and maintaining the drop weight apparatus including the high speed data acquisition system Valuable technical discussions with Drs PCWang and YihCharng Deng of General Motor Corporation are also acknowledged

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