Email this article Multiaxial Fatigue Crack Orientation and Early Growth Investigation Considering the Nonproportional Loading
- Authors: Song W.1, Liu X.1, Berto F.2
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Affiliations:
- State Key Laboratory of Advanced Welding and Joining
- Department of Engineering Design and Materials
- Issue: Vol 21, No 4 (2018)
- Pages: 358-370
- Section: Article
- URL: https://journals.rcsi.science/1029-9599/article/view/192318
- DOI: https://doi.org/10.1134/S1029959918040100
- ID: 192318
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Abstract
The paper presents a comprehensive investigation of fatigue cracking behaviors under various nonproportional multiaxial cycle loading paths based on the critical plane approach. The maximum normal and shear stress/strain fields are presented to analyze the crack orientation and early growth directions in polar diagrams. The experimental observed crack paths and directions were compared with maximum strain loci of each angle to determine multiaxial fatigue failure mode. The results show that crack orientation and growth paths appear in the maximum shear and normal strain plane, respectively. Likelihood cracking regions of various loading paths are predicted according the determined failure mode. Besides, nonproportionality factor is introduced to characterize the degree of multiaxiality on these loading paths.
About the authors
W. Song
State Key Laboratory of Advanced Welding and Joining
Email: liuxuesong@hit.edu.cn
China, Harbin, 150001
X. Liu
State Key Laboratory of Advanced Welding and Joining
Author for correspondence.
Email: liuxuesong@hit.edu.cn
China, Harbin, 150001
F. Berto
Department of Engineering Design and Materials
Email: liuxuesong@hit.edu.cn
Norway, Trondheim, 7491
