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Spot weld arrangement effects on the fatigue behavior of multi-spot welded joints

Spot weld arrangement effects on the fatigue behavior of multi-spot welded joints In the present study, the effects of spot weld arrangements in multi-spot welded joints on the fatigue behavior of the joints are studied. Three different four-spot welded joints are considered: one-row four-spot parallel to the loading direction, one-row four-spot perpendicular to the loading direction and two-row four-spot weld specimens. The experimental fatigue test results reveal that the differences between the fatigue lives of three spot welded types in the low cycle regime are more considerable than those in the high cycle regime. However, all kinds of spot weld specimens have similar fatigue strength when approaching a million cycles. A non-linear finite element analysis is performed to obtain the relative stress gradients, effective distances and notch strength reduction factors based on the volumetric approach. The work here shows that the volumetric approach does a very good job in predicting the fatigue life of the multi-spot welded joints. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Mechanical Science and Technology Springer Journals

Spot weld arrangement effects on the fatigue behavior of multi-spot welded joints

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References (17)

Publisher
Springer Journals
Copyright
Copyright © 2011 by The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg
Subject
Engineering; Mechanical Engineering; Vibration, Dynamical Systems, Control; Industrial and Production Engineering
ISSN
1738-494X
eISSN
1976-3824
DOI
10.1007/s12206-011-0112-x
Publisher site
See Article on Publisher Site

Abstract

In the present study, the effects of spot weld arrangements in multi-spot welded joints on the fatigue behavior of the joints are studied. Three different four-spot welded joints are considered: one-row four-spot parallel to the loading direction, one-row four-spot perpendicular to the loading direction and two-row four-spot weld specimens. The experimental fatigue test results reveal that the differences between the fatigue lives of three spot welded types in the low cycle regime are more considerable than those in the high cycle regime. However, all kinds of spot weld specimens have similar fatigue strength when approaching a million cycles. A non-linear finite element analysis is performed to obtain the relative stress gradients, effective distances and notch strength reduction factors based on the volumetric approach. The work here shows that the volumetric approach does a very good job in predicting the fatigue life of the multi-spot welded joints.

Journal

Journal of Mechanical Science and Technology – Springer Journals

Published: Mar 1, 2011

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