Improving the Fatigue Limit of Spot-Welded Tensile Shear Joints Using 980MPa-class High-tensile Steel Sheets as the Base Material
980MPa 級高張力鋼板を母材としたスポット溶接引張せん断継手の疲労限度向上
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- Publication code
- 20264134
- Paper/Info type
- JSAE Transaction
Vol.57 No.2
- Pages
- 208-214(Total 7 p)
- Date of publication
- Mar 2026
- Publisher
- JSAE
- Language
- Japanese
Detailed Information
| Category(J) | 論文 Translation |
|---|---|
| Category(E) | Paper |
| Author(J) | 1) 田中 耕太郎, 2) 岡部 顕史, 3) 冨岡 昇 |
| Author(E) | 1) Kotaro Tanaka, 2) Akifumi Okabe, 3) Noboru Tomioka |
| Affiliation(J) | 1) 日本大学大学院, 2) 日本大学, 3) 日本大学 |
| Abstract(J) | 980MPa級高張力鋼板を母材とするスポット溶接した引張せん断継手に，事前に単一過大荷重を負荷してき裂発生部位およびその周辺に圧縮残留応力を与えた後定振幅荷重疲労試験を行い，単一過大荷重による疲労限度の向上を確認した．また，有効ひずみ範囲を用いると単一過大荷重有無の疲労寿命を統一的に評価することを示した． Translation |
| Abstract(E) | In this study, we experimentally investigated whether the fatigue limit of spot welded tensile shear joints made from 980 MPa-class high-tensile steel sheets could be improved by applying a single overload in advance, and compared the results with those of 590 MPa-class steel spot welded joints. The threshold value of the loading ratio at which the effect of single overloading disappears was experimentally determined. Using the effective load and effective strain range obtained from the threshold values, the fatigue lives with and without single overload can be summarized on a single fatigue life curve, and these parameters are found to be useful for the fatigue life evaluation. |
