Development of a Fatigue Model for Low Alloy Steels Using a Cycle-Dependent Cohesive Zone Law | Zendy

Kim Kyungmok | Zendy; Lee Jaewook | Zendy; Choi Joo-Ho | Zendy

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Development of a Fatigue Model for Low Alloy Steels Using a Cycle-Dependent Cohesive Zone Law

Author(s) -

Kim Kyungmok,

Lee Jaewook,

Choi Joo-Ho

Publication year - 2014

Publication title -

advances in mechanical engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.318

H-Index - 40

ISSN - 1687-8132

DOI - 10.1155/2014/124037

Subject(s) - materials science , cohesive zone model , fracture (geology) , structural engineering , alloy , stiffness , finite element method , low cycle fatigue , reduction (mathematics) , stress (linguistics) , fatigue testing , alloy steel , fracture mechanics , metallurgy , composite material , engineering , mathematics , geometry , linguistics , philosophy

A fatigue model for SAE 4130 steels is developed using a cycle-dependent cohesive zone law. Reduction of fracture energy and degradation of stiffness are considered to describe failure resistance after certain number of cycles. The reduction rate of fracture energy is determined with experimental stress ( S )- number of cycles to failure ( N ) scatter found in the literature. Three-dimensional finite element models containing a cohesive zone are generated with commercial software (ABAQUS). Calculated fatigue lives at different stress ratios are in good agreement with experimental ones. In addition, fatigue behavior of hardened SAE 4130 steels is predicted with that of normalized material.

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