A notch critical plane approach of multiaxial fatigue life prediction for metallic notched specimens

2018 ◽  
Author(s):  
Peng Luo ◽  
Weixing Yao ◽  
Piao Li
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Multiaxial Fatigue ◽  
Fatigue Life Prediction ◽  
Critical Plane ◽  
Notched Specimens ◽  
Critical Plane Approach

Fatigue Life Prediction Strategies for High-Heat-Load Components

2010 ◽  
Vol 452-453 ◽  
pp. 789-792
Author(s):  
W.L. Xiao ◽  
H.B. Chen ◽  
J.F. Jin
Keyword(s):  
Fatigue Life ◽  
Heat Load ◽  
Life Prediction ◽  
High Heat ◽  
Multiaxial Fatigue ◽  
Fatigue Life Prediction ◽  
Critical Plane ◽  
Critical Plane Approach ◽  
High Heat Load ◽  
Strain Model

High-heat-load components such as photon shutters and masks made of Glidcop Al-15 are subjected to intense thermal cycles from the X-ray beams at the third generation light sources. This paper presents thermal fatigue life prediction results of high-heat-load components at the beam line front end of Shanghai Synchrotron Radiation Facility (SSRF) under different power conditions. Used in this analysis are four typical multiaxial fatigue life prediction models, i.e. the maximum principal strain model, equivalent vonMises strain model, maximum shear strain model and critical plane approach. Detailed comparisons among them were implemented from various aspects including applicable conditions, physical meanings and resultant veracities. Critical plane approach was finally determined to be more appropriate method for dealing with multiaxial fatigue of high-heat-load components. To obtain the multiaxial stress-strain fields, nonlinear finite element analysis (FEA) was performed with commercial software ANSYS.

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