Numerical effects on notch fatigue strength assessment of non-welded and welded components
Pages 51 - 61
Abstract
Comparison of numerical and analytical notch fatigue strength assessment.Element type and mesh density reveal a significant impact on numerical results.Recommendations to ensure a proper stress-based fatigue design are provided. Local fatigue strength assessment based on threshold values obtained by linear-elastic notch stress calculation is commonly utilized due to its applicability to complex geometries with an acceptable effort. As the result of a finite element computation is affected by the element type and mesh refinement, this paper investigates the numerical influence on the notch stress based fatigue strength assessment of non-welded and welded components. Based on extensive finite element studies employing the software package Abaqus it is concluded that quadratic shape functions with a number of sixteen for non-welded parts and twelve elements over a semicircle for welded joints should be at least applied to minimize the numerical impact.
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- Numerical effects on notch fatigue strength assessment of non-welded and welded components
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Published: 15 October 2017
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