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

1996 ◽  
Vol 55 (1) ◽  
pp. 155-161 ◽  
Author(s):  
Guang-Xu Cheng ◽  
Jian-Zheng Zuo ◽  
Zhi-Wen Lou ◽  
Zhen-Bang Kuang
Keyword(s):  
Fatigue Damage ◽  
Welded Joint ◽  
Low Cycle Fatigue ◽  
Damage Model ◽  
Damage Analysis ◽  
Continuum Damage ◽  
Cycle Fatigue ◽  
Continuum Damage Model ◽  
Fatigue Damage Analysis

A Multi-Level Low Cycle Fatigue Damage Model for Forging Die Material

2006 ◽  
Vol 514-516 ◽  
pp. 804-809
Author(s):  
S. Gao ◽  
Ewald Werner
Keyword(s):  
Fatigue Life ◽  
Fatigue Damage ◽  
Low Cycle Fatigue ◽  
Damage Model ◽  
Fatigue Loading ◽  
Cycle Fatigue ◽  
Die Material ◽  
Multi Level ◽  
Loading Sequence ◽  
Forging Die

The forging die material, a high strength steel designated W513 is considered in this paper. A fatigue damage model, based on thermodynamics and continuum damage mechanics, is constructed in which both the previous damage and the loading sequence are considered. The unknown material parameters in the model are identified from low cycle fatigue tests. Damage evolution under multi-level fatigue loading is investigated. The results show that the fatigue life is closely related to the loading sequence. The fatigue life of the materials with low fatigue loading first followed by high fatigue loading is longer than that for the reversed loading sequence.

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