Life Prediction Under Multiaxial Complex Stress States of Variable Amplitude

2011 ◽  
pp. 199-232
Author(s):  
Anastasios P. Vassilopoulos ◽  
Thomas Keller
Keyword(s):  
Life Prediction ◽  
Complex Stress ◽  
Variable Amplitude ◽  
Stress States

scholarly journals A New Software Framework for Fatigue Life Prediction of Composite Materials under Irregular Loading

2006 ◽  
Vol 15 (1) ◽  
pp. 096369350601500 ◽  
Author(s):  
Anastasios P. Vassilopoulos
Keyword(s):  
Fatigue Life ◽  
Composite Materials ◽  
Life Prediction ◽  
Complex Stress ◽  
Fatigue Life Prediction ◽  
Software Framework ◽  
Material System ◽  
Variable Amplitude ◽  
Stress States ◽  
Irregular Loading

A new software framework for fatigue life prediction of composite materials under irregular loading is presented herein. The entire work is based on a well established methodology for the life prediction of GRP laminates under variable amplitude complex stress states. The process consists of the sequential execution of four main tasks, each one of which copes with a single subproblem in a straight forward manner. The aim of this on-going work is to create a generic software framework that will enable rapid prototyping of various life prediction schemes. Based on the software design, a software library is under development. In the current paper, the software framework is analytically presented. Two different modules are prepared for the first task of the entire methodology. Cycle counting of two different variable amplitude spectra is performed by rainflow counting technique and by simple range-mean technique. Results of both analyses are then processed by routines that solve subsequent steps of the entire methodology in order to predict time up to failure of the material system under consideration, a [0/(±45)2/0]T multidirectional laminate. Theoretical predictions are plotted against experimental data for comparison, and pros and cons of each one of the cycle counting algorithms are discussed.

A computational tool for the life prediction of GFRP laminates under irregular complex stress states: Influence of the fatigue failure criterion

2010 ◽  
Vol 49 (3) ◽  
pp. 483-491 ◽  
Author(s):  
Anastasios P. Vassilopoulos ◽  
Roohollah Sarfaraz ◽  
Behzad D. Manshadi ◽  
Thomas Keller
Keyword(s):  
Fatigue Failure ◽  
Failure Criterion ◽  
Life Prediction ◽  
Complex Stress ◽  
Computational Tool ◽  
Stress States

Failure behavior of aerial bomb lifting lug under variable amplitude loading: Failure analysis and life prediction

2021 ◽  
Vol 120 ◽  
pp. 105000
Author(s):  
Bowen Wang ◽  
Liyang Xie ◽  
Jiaxin Song ◽  
Xuehong He ◽  
Weifeng Luo ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Life Prediction ◽  
Failure Behavior ◽  
Variable Amplitude Loading ◽  
Variable Amplitude

scholarly journals Investigation of deformation twinning under complex stress states in a rolled magnesium alloy

2016 ◽  
Vol 683 ◽  
pp. 619-633 ◽  
Author(s):  
Wei Wu ◽  
Chih-Pin Chuang ◽  
Dongxiao Qiao ◽  
Yang Ren ◽  
Ke An
Keyword(s):  
Magnesium Alloy ◽  
Complex Stress ◽  
Deformation Twinning ◽  
Stress States

A weight function method for multiaxial low-cycle fatigue life prediction under variable amplitude loading

2018 ◽  
Vol 53 (4) ◽  
pp. 197-209 ◽  
Author(s):  
Xiao-Wei Wang ◽  
De-Guang Shang ◽  
Yu-Juan Sun
Keyword(s):  
Fatigue Life ◽  
Weight Function ◽  
Life Prediction ◽  
Function Method ◽  
Low Cycle Fatigue ◽  
Fatigue Life Prediction ◽  
Cycle Fatigue ◽  
Critical Plane ◽  
Variable Amplitude ◽  
Weight Function Method

A weight function method based on strain parameters is proposed to determine the critical plane in low-cycle fatigue region under both constant and variable amplitude tension–torsion loadings. The critical plane is defined by the weighted mean maximum absolute shear strain plane. Combined with the critical plane determined by the proposed method, strain-based fatigue life prediction models and Wang-Brown’s multiaxial cycle counting method are employed to predict the fatigue life. The experimental critical plane orientation and fatigue life data under constant and variable amplitude tension–torsion loadings are used to verify the proposed method. The results show that the proposed method is appropriate to determine the critical plane under both constant and variable amplitude loadings.

A cohesive model for fatigue failure in complex stress-states

2012 ◽  
Vol 36 (1) ◽  
pp. 155-162 ◽  
Author(s):  
Deepak Jha ◽  
Anuradha Banerjee
Keyword(s):  
Fatigue Failure ◽  
Complex Stress ◽  
Cohesive Model ◽  
Stress States
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