FRACTURE MECHANICS APPROACH FOR THE EFFECT OF STRESS RATIO OF CARBURIZED STEELS.

被引：0

作者：

Masuda, Chitoshi

Nisijima, Satoshi

Takeuchi, Etsuo

Tanaka, Yoshihisa

Ishii, Akira

机构：

来源：

Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A | 1986年 / 52卷 / 476期

关键词：

FATIGUE OF MATERIALS - FRACTURE MECHANICS;

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摘要：

To make a quantitative analysis of the effect of stress ratio on the fatigue properties for carburized steel, the fatigue properties and fatigue fracture mechanism were examined for 2 carburized steels. Carburizing, quenching and tempering were performed at one condition, and the fatigue strength was evaluated up to 10**8 cycles under uniaxial loading of two stress ratios, R equals minus 1 and 0, at room temperature in laboratory air. The threshold stress intensity factor when a mode I crack begins to grow was linearly related to (1-R)** gamma for the two carburized steels, and by a similar relation, the fatigue life can be predicted in the long life region over about 10**6. The lope on the Haigh diagram was discussed by fracture mechanics.

引用

页码：841 / 846