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On Theoretical Analysis of Stress at Welding Flange of Spot Welded Box Section Member Under Torsion
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English
Abstract
In automobile frame work, box members formed by spot welding two thin walled members of hat section together, or by welding a flat plate to one hat member are widely used as members. (The former are called double hat members, and the latter single hat members.)
When such members are subjected to repeated torsion, cracks would occur at the spot weld point. This is due to a large shearing force transmitted through the weld point. Since fatigue strength is directly required in the aspect of design, many studies are being made in this connection. Considering that the basis of fatigue strength is primarily the stress distribution around the weld point, its problem must be clarified by all means.
In this report, then, the stress distribution of welding flanges was theoretically analyzed as a plane stress problem and a bending problem of plates by the theory of elasticity and obtained by superposition of these solutions. These theoretical results were compared with results of the finite element method and with the experimental results.
Citation
Tomioka, N., Niisawa, J., and Mabuchi, A., "On Theoretical Analysis of Stress at Welding Flange of Spot Welded Box Section Member Under Torsion," SAE Technical Paper 860602, 1986, https://doi.org/10.4271/860602.Also In
References
- Tomioka, Yi Mabuchi, Niisawa “Stress distribution of welded joints of spot welded box section member subject to torsion” (1st report, In the case of double hat member) JSAE. '84 Autumn Convention
- Tomioka, Niisawa Mabuchi. Hayashi Yi, Koiso “Stress distribution of welded joints of spot welded box section member subject to torsion” (2st report, In the case of single hat member) JSAE. '85 Spring Convention
- Niisawa, Koiso Tomioka. Hayashi Mabuchi, Yi “Theoretical analysis of stress at spot welded flange portion” JASE. (Symposium on automobile weight reduction, fatigue strength problem, and spot welding) Mar 85