✦ LIBER ✦

Continuum damage model of low-cycle fatigue and fatigue damage analysis of welded joint

✍ Scribed by Guang-Xu Cheng; Jian-Zheng Zuo; Zhi-Wen Lou; Zhen-Bang Kuang

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 425 KB
Volume: 55
Category: Article
ISSN: 0013-7944
DOI: 10.1016/0013-7944(95)00261-8

No coin nor oath required. For personal study only.

✦ Synopsis

We know from experimental phenomena that the ductility of materials decreases with increasing numbers of cycles in the process of cycle fatigue loading, from which a new fatigue damage variable D * based on the material ductility property is defined. Then a continuum damage mechanics model for low-cycle fatigue is derived from the new damage variable and is used to study the fatigue damage of welded joint. Damage evolution equations for the weld metal, heat-affected zone and base metal of 16MnR steel are obtained, respectively. The theoretical and experimental results show that the new damage variable D ~ has a definite physical meaning and can be measured by a simple procedure and it can be related to the mechanical property of material directly.

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