Low cycle fatigue damage and critical crack length affecting loss of fracture ductility

被引：8

作者：

Murakami, Yukitaka ^{[1
]}

Ferdous, Md. Shafiul ^{[2
]}

Makabe, Chobin ^{[2
]}

机构：

[1] Kyushu Univ, Nishi Ku, Fukuoka 8190395, Japan

[2] Univ Ryukyus, Nishihara, Okinawa 9030213, Japan

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2016年 / 82卷

关键词：

Low cycle fatigue; Crack initiation; Crack growth; Fracture ductility; Fatigue damage; COPPER;

D O I：

10.1016/j.ijfatigue.2015.05.006

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The role of small cracks on fatigue life and loss of ductility are discussed to understand the reality of fatigue damage in low cycle fatigue. The series of low cycle fatigue tests were carried out paying attention to the role of small cracks and their influence on ductility loss. These tests showed that the fatigue lives were pronouncedly extended by removing surface cracks. Also, it was quantified that the loss of fracture ductility was correlated with crack length but not with the number of fatigue cycles. From those results, it is concluded that the behavior of small cracks is crucial to explain the mechanism of low cycle fatigue damage rather than the crack initiation process and change in bulk material properties. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：89 / 97

页数：9

共 18 条

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