Life Prediction and Verification under Multiaxial Fatigue Loading

Lei Wang; Tian Zhong Sui; Qiu Cheng Tian

doi:10.4028/www.scientific.net/AMM.365-366.991

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 365-366Life Prediction and Verification under Multiaxial...

Life Prediction and Verification under Multiaxial Fatigue Loading

Abstract:

The strain change characteristics of multiaxial fatigue are analyzed under the condition of the combined tension and torsion loading for thin-tube specimen. Based on the principle of multiaxial critical plane approach, a multiaxial fatigue damage parameter is established, which takes account of the effect of not only the maximum shear strain amplitude and normal strain amplitude on the critical plane but also the parameter of non-proportionality. The non-proportionality is the function of loading parameters which is closely contact with the strain change characteristics of multiaxial fatigue and it can indicate the whole material damage. The experiments under the tension-torsion proportional and non-proportional loading were conducted to verify the multiaxial fatigue life model proposed in this paper. The life prediction has a good correlation with the experimental results.

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Periodical:

Applied Mechanics and Materials (Volumes 365-366)

Pages:

991-994

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.365-366.991

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Online since:

August 2013

Authors:

Lei Wang, Tian Zhong Sui, Qiu Cheng Tian

Keywords:

Critical Plane, Life Prediction, Material Damage, Multiaxial Fatigue, Non-Proportionality

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