Skip to main content

A parametric study on fatigue strength of spot-weld joints

Buy Article:

$43.00 plus tax (Refund Policy)

ABSTRACT

Fastening elements usually lead to high stress concentrations; fatigue failure thus becomes the most critical failure mode for a fastening element itself or the region around it under fluctuating stresses. A designer should seek the ways of increasing fatigue strength of a joint to ensure the safety of the whole structure.

Resistance spot welding is the most preferred method to join metal sheets. The design variables for spot-weld joints affecting their strengths are basically sheet thickness, spot-weld nugget diameter, number of spot welds and the joint type as exemplified in tensile shear (TS), modified tensile shear (MTS), coach peel (CP) and modified coach peel (MCP) specimens.

In this study, the effects of these parameters on the fatigue life of spot-weld joints have been investigated. For this purpose, one of the most reliable fatigue assessment models, Coffin–Manson approach, was used. In order to accurately determine the stress and strain states, a nonlinear finite element analysis was carried out taking into account plastic deformations, residual stresses developed after unloading and contacting surfaces. The results provide designers with some guidelines to foresee the impact of design changes on fatigue strength of spot-weld joints.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Keywords: fatigue life prediction; finite element analysis; plastic deformation; spot weld

Document Type: Research Article

Affiliations: Department of Mechanical Engineering, Bogazici University, Istanbul, Bebek, 34342, Turkiye

Publication date: 2008-09-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more