Tensile and shear behavior of undermatched welded joints
- Lehigh Univ., Bethlehem, PA (United States)
Large-scale specimens were made from HSLA-100 steel plate (690 MPa minimum yield strength) featuring groove welds with varying strength ranging from overmatched to significantly undermatched. Tensile tests with transverse groove welds demonstrated that moderately undermatched joints (15% or less) can achieve strength and ductility as good as the overmatched welds. Severely undermatched joints (> 25%) provide full strength, but only limited ductility. The constraint in the large-scale specimens, as in the actual structures, increases the load capacity of the undermatched joints. Unlike the large-scale specimens, conventional flat-strap cross-weld tension specimens cut from the same undermatched welds fail prematurely due to lack of constraint. Shear tests showed that undermatched groove welds do not affect shear strength and ductility. The test results could be reasonably simulated using small-strain elastoplastic finite-element analysis.
- OSTI ID:
- 264118
- Report Number(s):
- CONF-950604--; ISBN 1-880653-20-6
- Country of Publication:
- United States
- Language:
- English
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