A method for low-cycle fatigue life assessment of metallic materials under multiaxial loading |
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| Authors: | S Shukaev M Gladskii A Zakhovaiko K Panasovskii |
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| Affiliation: | (1) Institute of Mechanical Engineering, Department of Machine Dynamic and Strength of Materials, National Technical University of Ukraine “Kiev Polytechnic Institute”, Kiev, Ukraine |
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| Abstract: | A new method of fatigue life assessment under multiaxial low-cycle regular and irregular loading is proposed, which is based
on the modified Pisarenko-Lebedev criterion, the linear damage accumulation hypothesis, and the nonlinear Manson approach.
The results of low-cycle fatigue tests of titanium alloy VT9 under irregular proportional and non-proportional biaxial loading
are given. The tests were carried out at three Mises strain levels (0.6, 0.8, and 1.0%) with various combinations of proportional
and non-proportional strain paths. All the tests were carried out at room temperature. The proposed method turned out to be
effective and to allow for such factors as strain state type, strain path type and loading irregularity.
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Translated from Problemy Prochnosti, No. 1, pp. 56–59, January–February, 2008. |
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| Keywords: | multiaxial low-cycle fatigue irregular loading titanium alloys damage accumulation limit state criteria |
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