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Biaxial/Multiaxial Fatigue and Fracture, 6 International - download pdf or read online

By Andrea Carpinteri, Manuel de Freitas and Andrea Spagnoli (Eds.)

ISBN-10: 0080441297

ISBN-13: 9780080441290

ISBN-10: 0080527817

ISBN-13: 9780080527819

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Extra info for Biaxial/Multiaxial Fatigue and Fracture, 6 International Conference on Biaxial/Multiaxial Fatigue and Fracture

Example text

This is the reason for the lower predicted lives for this design. Some inherent uncertainties are obviously linked with the submodelling technique itself. Calculated results also depend on the multiaxial fatigue criterion used. In general nonproportional loading cases, criteria based on conventional equivalent stresses (Tresca, von Mises) are inappropriate. In special cases with locally proportional stress situation, they might work to a limited extent as well. The hypothesis of the effective equivalent stress introduced by Sonsino and Klippers [21] showed good predictions for welded flange-tube joints from fine-grained steel FeE 460 under bending and torsion with constant and variable amplitudes.

Evaluation of Fatigue of Fillet Welded Joints in Vehicle Components Under Multiaxial Service Loads 35 Failure-critical regions Fig. 16. Distribution of calculated damage - maximum principal stress criterion FATIGUE LIFE CALCULATION FOR THE OLD DESIGN BASED ON THE LOCAL STRESS APPROACH Finite element modelling Fatigue life evaluation of the new design based on local elastic stresses clearly revealed that the notch root is no longer critical. For comparison purposes, the old design as shown in Fig.

Load configuration on the test rig Fig. 3. Load sequences, 1 block LIFE CALCULATION m ACCORDANCE WITH THE HOT SPOT STRESS APPROACH Finite Element Modelling Niemi [8, 9] presents a series of variants for realising the joint between two welded parts in a finite element (FE) model but does not give a clear recommendation. Figure 4 [8] shows various ways to model cover plate endings. Shell element _ a) double shells connected by a vertical shell Rigid bar Rigid bar elements • _ t _ i S h e l l I el( _1 b) double shells connected by a vertical shell and inclined shell elements c) double shells connected by rigid bars u.

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Biaxial/Multiaxial Fatigue and Fracture, 6 International Conference on Biaxial/Multiaxial Fatigue and Fracture by Andrea Carpinteri, Manuel de Freitas and Andrea Spagnoli (Eds.)


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