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Multiaxial Fatigue Criteria for Random Stress Response - Theoretical and Experimental Comparison
 
M. Mršnik, J. Slavič and M. Boltežar
Multiaxial Fatigue Criteria for Random Stress Response - Theoretical and Experimental Comparison
Procedia Engineering 101 (2015): 459-466 
download pdf   more   dx.doi.org/10.1016/j.proeng.2015.02.055
Abstract
Randomly excited structures are exposed to random stress loads that can result in fatigue failure. Prediction of such failure requires good structural dynamics and fatigue models. This study researches the multiaxial criteria which reduce the multiaxial stress state to an equivalent uniaxial stress. Several frequency-domain criteria can be found in literature. However, experimental comparison studies are scarce. This research presents and then theoretically and experimentally compares selected frequency-domain multiaxial criteria, namely: maximum normal stress, maximum shear stress and the C-S criterion. Time-to-failure results are compared across multiaxial criteria and with experimental data. Results show that selected methods give reliable estimates.
Authors
 
 
Researcher
Matjaž Mršnik,PhD
Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
matjaz.mrsnik@ladisk.si    ⌂ ladisk.si/~mrsnik/
☏ +386 1 4771 227   matmr  
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Associate Professor
Janko Slavič,PhD
Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
janko.slavic@fs.uni-lj.si    ⌂ ladisk.si/~slavic/
☏ +386 1 4771 226   jankoslavic   jankoslavic
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Professor
Miha Boltežar,PhD
Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
miha.boltezar@fs.uni-lj.si    ⌂ ladisk.si/~boltezar/
☏ +386 1 4771 608     
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