Investigation on the void closure efficiency in cogging processes of the large ingot by using a 3-D void evolution model

2016 ◽  
Vol 237 ◽  
pp. 371-385 ◽  
Author(s):  
Chao Feng ◽  
Zhenshan Cui ◽  
Mingxiang Liu ◽  
Xiaoqing Shang ◽  
Dashan Sui ◽  
...  
Keyword(s):  
Evolution Model ◽  
Large Ingot ◽  
Void Closure ◽  
Void Evolution

scholarly journals Void-closure behavior and a new void-evolution model for various stress states

2021 ◽  
Vol 55 (1) ◽  
pp. 105-113
Author(s):  
F. Chen ◽  
X. Zhao ◽  
H. Chen ◽  
J. Ren
Keyword(s):  
Evolution Model ◽  
Void Closure ◽  
Void Evolution ◽  
Stress States

Damage and fatigue analysis of AA7050-T7451 plate with cold expanded hole based on a micro-void evolution model

2019 ◽  
Vol 54 (2) ◽  
pp. 105-115
Author(s):  
Fengmei Xue ◽  
Fuguo Li ◽  
Xiaolei Cui
Keyword(s):  
Fatigue Life ◽  
Fatigue Behavior ◽  
Three Dimensional ◽  
Complex Stress ◽  
Evolution Model ◽  
Fatigue Properties ◽  
Strengthening Effect ◽  
Void Evolution ◽  
Cold Worked ◽  
Three Dimensional Finite Element

The ultimate tensile strength and fatigue life of plate with cold worked hole under high loading are always key designing parameters in engineering field. In this article, different cold expanded degrees (ranging from 1.69% to 11.11%) are applied to plate specimens with a central hole, made of 7050-T7451 aluminum alloy. The damage and fatigue properties are investigated by the three-dimensional finite element method with a user subroutine embedded into a void evolution model under complex stress states. The damage analysis indicates that plastic damage becomes critical when the cold expanded degree is larger than 7.14%, which does not suit for further service due to the loss of toughness. The cold expanded degree of 5.26% is identified as the best. It can be found that the fatigue life improves with the increased cold expanded degree. The small cold expanded degree leads to poor strengthening effect because of lacking sufficient residual stress, while large cold expanded degree makes micro-cracks emerge, which is beneficial to the increase in strengthening. All these results prove that the numerical analysis can accurately predict fatigue behavior of AA7050-T7451 plate based on our proposed approach, which is expected to be a powerful method in engineering field.

Research on new evolution model of scale-free network

2009 ◽  
Vol 29 (5) ◽  
pp. 1230-1232
Author(s):  
Hao RAO ◽  
Chun YANG ◽  
Shao-hua TAO
Keyword(s):  
Evolution Model ◽  
Scale Free Network ◽  
Scale Free ◽  
Free Network
Sign in / Sign up

Export Citation Format

Share Document