GS0209-268 Fatigue Strength of High Tensile Steel Spot-weld : 1. Evaluation with Stress Intensity Factor

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Other Title
  • GS0209-268 ハイテンスポット溶接部の疲労強度 : 1. 応力拡大係数評価

Abstract

The spot weld of high tensile steel does not improve as base metal strength. However, with the application of high tensile steel by the body light weighting, the strength evaluation of the spot weld becomes important in a design. Therefore I perform the fatigue test of high tensile steel and spot welded joint and clarify control factor and a design guideline for the fatigue strength. As a result, I made clear that I could evaluate fatigue strength with a stress Intensity Factor mixed mode (mode I and mode II).

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