Increasing the Relevance of Fatigue Test Results - A Proposal for a New Testing Procedure for Joints, Part 1
Sumanjit Singh, Gaimersheim, Ortwin Hahn and Yiming Tan, Paderborn and Genbao Zhang, Wolfsburg
ABSTRACT The data generated with fatigue tests using current laboratory specimens currently used, are not suitable for correlating the results of FE calculations with those of experimental work. This is to a very large extent, due to the large difference in the number of load cycles at the different states of damage corresponding to technical failure and initial cracks corresponding to the valid limits of linear elastic FE calculations. In addition, the influence of load redistribution phenomena resulting from initial non-uniform load distribution and as a consequence of local plastification, cracks and crack propagation is also neglected in the calculations. The new test, proposed in this paper, will deliver results with which correction factors for correlating FE calculations with experimental values can be derived, taking into consideration the degree of non-uniformity of the load distribution. Furthermore, it will enable a more realistic evaluation of the different types of joints, such as punctiform and linear joints.
Publication Source: Materialprüfung, ISSN: 0025-5300
Issue: 2003-7/8, pp -
Publisher: Carl Hanser Verlag München
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