Fatigue assessment of arc welded automotive components using local stress approaches: Application to a track control arm |
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Authors: | Ekke Hanssen Martin Vogt Klaus Dilger |
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Affiliation: | Institute of Joining and Welding, Technische Universität Braunschweig, 38106 Braunschweig, Germany |
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Abstract: | The applicability of the structural and notch stress approach is examined on the basis of arc welded and dynamically loaded steel structures, taken from the automotive sector. In detail, this is a transverse control arm. Components and specimens with critical regions of failure are tested under cyclic loading with constant and variable amplitudes. With the help of strain gauges, the crack initiation is determined. The specimens are the basis for the application and evaluation of the different approaches for the assessment of fatigue life. The numerical determination of the nominal, structural and notch stresses is performed with finite-element models. Finally the experimental and computational results allow the derivation of structural and notch Woehler S-N curves. |
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Keywords: | Design codes Experimental stress analysis Fatigue design Fatigue strength S-N curves |
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