Fatigue Strength Evaluation of the Clinched Lap Joints of a Cold Rolled Mild Steel Sheet
Abstract
Static tensile and fatigue tests were conducted using tensile-shear specimens to evaluate the fatigue strength of clinched lap joints of a cold rolled mild steel sheet. The maximum tensile force (= holding force) of the specimen produced at the optimal punching force was 70 kN. The fatigue endurance limit (= 760 N) approached 43% of the maximum tensile load (= 1750 N) at a load ratio of 0.1, suggesting that the fatigue limit is approximately half of the value of the maximum tensile force. The FEM analysis showed that at the fatigue endurance limit, the maximum von Mises stress of 373 MPa is very close to the ultimate tensile strength of the cold rolled mild steel sheet (= 382 MPa).
- Publication:
-
Journal of Materials Engineering and Performance
- Pub Date:
- January 2013
- DOI:
- 10.1007/s11665-012-0232-1
- Bibcode:
- 2013JMEP...22..294K
- Keywords:
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- clinch joining;
- cold rolled steel sheet;
- fatigue strength;
- FEM analysis;
- lap joint