Effect of Residual Stress on Fatigue Fracture of Case-Hardened Steels—An Analytical Model

C Kim; DE Diesburg; GT Eldis

doi:10.1520/STP30107S

SYMPOSIA PAPER Published: 01 January 1982

STP30107S

Effect of Residual Stress on Fatigue Fracture of Case-Hardened Steels—An Analytical Model

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The influence of residual stress at and near the surface on fatigue life was modeled by utilizing linear elastic fracture mechanics to quantify the stress intensity change due to the residual stress. The initiation and the propagation stages of the fatigue cracking process were distinguished using the concept of the threshold stress intensity amplitude; with a constant load amplitude, the propagation stage commences from the crack length at which the maximum fatigue stress intensity is equal to the threshold value. The influence of residual stress is to increase or decrease the crack length which corresponds to the initiation stage, thereby controlling the fatigue crack initiation life.

Author Information

Kim, C

Metallurgy Department, General Motors Research Laboratories, Warren, Mich.

Diesburg, DE

Climax Molybdenum Company of Michigan, Ann Arbor, Mich.

Eldis, GT

Climax Molybdenum Company of Michigan, Ann Arbor, Mich.

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Details

Developed by Committee: E08

Pages: 224–234

DOI: 10.1520/STP30107S

ISBN-EB: 978-0-8031-4841-3

ISBN-13: 978-0-8031-0711-3

Effect of Residual Stress on Fatigue Fracture of Case-Hardened Steels—An Analytical Model

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