Study on the short fatigue crack initiation and propagation behavior of 42CrMo

Nan Xu; Zhiwei Fu; Yuan Wang; Xuehui Shen

doi:10.1177/16878132221119928

Advances in Mechanical Engineering (Sep 2022)

Study on the short fatigue crack initiation and propagation behavior of 42CrMo

Nan Xu,
Zhiwei Fu,
Yuan Wang,
Xuehui Shen

Affiliations

Nan Xu: School of Mechanical and Electronic Engineering, Shandong Jianzhu University, Jinan, Shandong, China
Zhiwei Fu: School of Mechanical and Electronic Engineering, Shandong Jianzhu University, Jinan, Shandong, China
Yuan Wang: School of Mechanical Engineering, Shandong University of Engineering and Vocational Technology, Jinan, Shandong, China
Xuehui Shen: School of Mechanical and Electronic Engineering, Shandong Jianzhu University, Jinan, Shandong, China

DOI: https://doi.org/10.1177/16878132221119928
Journal volume & issue: Vol. 14

Abstract

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A micro-tensile fatigue test of 42CrMo alloy steel was carried out. The result shows that the crack initiation and propagation of the material could be characterized with randomness and localization. There existed two sorts of short fatigue crack propagation behaviors for the tested material, that is, self-propagation and joint propagation with other short cracks. A short fatigue crack growth rate function was built considering the propagation characteristics. Moreover, a simulation model of short fatigue crack evolution was built. Total three samples were tested and simulated. The experimental result was in good consistent with that from simulation, both showing that the crack growth rate accelerated first and then decelerated during propagation.

Published in Advances in Mechanical Engineering

ISSN: 1687-8132 (Print); 1687-8140 (Online)
Publisher: SAGE Publishing
Country of publisher: United Kingdom
LCC subjects: Technology: Mechanical engineering and machinery
Website: https://journals.sagepub.com/home/ade

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