A fatigue design parameter for spot welds

The development of fatigue cracks in galvanized low carbon and high-strength-low-alloy tensile-shear-spot weldments was investigated using the AT & T Microhmeter. The boundaries between the three stages of the fatigue life were determined based on the resistivity measurements of the Microhmeter. Subsequently, the effects of sheet thickness, specimen width, and nugget diameter on the total fatigue life as well as its stages were studied. Sheet thickness was found to have the largest effect on fatigue life while the nugget diameter had the least. The galvanized low carbon tensile-shear specimens outperformed the corresponding high-strength-low-alloy specimens in the long life regime.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Civil Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Swellam, Mohammed Helmi Mamoun

Contributors dc:contributor

• Lawrence, Frederick V., Jr

• Engineering, Civil

Statement dc:rights

• Copyright 1991 Swellam, Mohammed Helmi Mamoun

Language dc:language

eng

Identifier

AAI9211006
(UMI)AAI9211006

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/21270