Geometric functions of stress intensity factor solutions for spot welds in cross-tension specimens

Stress intensity factor solutions for spot welds in cross-tension specimens are investigated by finite element analyses. Three-dimensional finite element models are developed to obtain accurate solutions. Various ratios of sheet thickness, half specimen width and half effective specimen length to nu...

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Bibliographic Details
Published in:Engineering fracture mechanics 2011-12, Vol.78 (18), p.3270-3288
Main Authors: Lin, P.-C., Lin, Z.-L.
Format: Article
Language:English
Subjects:
Approximation
Computation
Cross-tension specimen
Exact sciences and technology
Fatigue
Finite element method
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Geometric function
Mathematical analysis
Mathematical models
Physics
Solid mechanics
Spot weld
Spot welds
Stress intensity factor
Structural and continuum mechanics
Tension tests
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Summary:Stress intensity factor solutions for spot welds in cross-tension specimens are investigated by finite element analyses. Three-dimensional finite element models are developed to obtain accurate solutions. Various ratios of sheet thickness, half specimen width and half effective specimen length to nugget radius are considered. The computational results confirm the functional dependence on the nugget radius and sheet thickness of Zhang’s analytical solutions. The results also provide three geometric functions in terms of normalized half specimen width and normalized half effective specimen length to Zhang’s analytical solutions. Based on the analytical and computational results, the dimensions of cross-tension specimens and the corresponding approximate stress intensity factor solutions are suggested.
ISSN:0013-7944
1873-7315
DOI:10.1016/j.engfracmech.2011.09.015