scholarly journals Cyclic mean stress relaxation behaviour of P91 steel: Experiments and constitutive modeling

2019 ◽  
Vol 14 ◽  
pp. 619-626
Author(s):  
Bimal Das ◽  
Akhilendra Singh
Keyword(s):  
Stress Relaxation ◽  
Constitutive Modeling ◽  
Mean Stress ◽  
Relaxation Behaviour ◽  
P91 Steel ◽  
Mean Stress Relaxation

A Cyclic Plasticity Model for Advanced Light Metal Alloys

2013 ◽  
Vol 391 ◽  
pp. 3-8 ◽  
Author(s):  
Kyriakos I. Kourousis
Keyword(s):  
Stress Relaxation ◽  
Automotive Industry ◽  
Preliminary Analysis ◽  
Light Metal ◽  
Metal Alloys ◽  
Cyclic Plasticity ◽  
Isotropic Hardening ◽  
Mean Stress ◽  
Mean Stress Relaxation ◽  
Cyclic Plasticity Model

Advanced light metals have recently attracted the interest of the aerospace and automotive industry. The need for accurate description of their cyclic inelastic response under various loading histories becomes increasingly important. Cyclic mean stress relaxation and ratcheting are two of the phenomena under investigation. A combined kinematic isotropic hardening model is implemented for the simulation of the behavior of Aluminum and Titanium alloys in uniaxial mean stress relaxation and ratcheting. The obtained results indicate that the model can perform well in these cases. This preliminary analysis provides useful insight for the evaluation of the models capabilities.

Mean stress relaxation during cyclic straining of high strength aluminum alloys

2009 ◽  
Vol 31 (11-12) ◽  
pp. 1742-1750 ◽  
Author(s):  
Attilio Arcari ◽  
Raffaella De Vita ◽  
Norman E. Dowling
Keyword(s):  
Aluminum Alloys ◽  
Stress Relaxation ◽  
High Strength ◽  
Mean Stress ◽  
Mean Stress Relaxation ◽  
High Strength Aluminum Alloys ◽  
Cyclic Straining

Fatigue Behavior of Stainless Steel 304L Including Strain Hardening, Prestraining, and Mean Stress Effects

2010 ◽  
Vol 132 (2) ◽  
Author(s):  
Julie Colin ◽  
Ali Fatemi ◽  
Said Taheri
Keyword(s):  
Stainless Steel ◽  
Fatigue Life ◽  
Stress Relaxation ◽  
Fatigue Behavior ◽  
Control Mode ◽  
Mean Stress ◽  
Continuous Increase ◽  
Stainless Steel 304L ◽  
Mean Stress Relaxation ◽  
Mean Strain

This paper discusses cyclic deformation and fatigue behaviors of stainless steel 304L and aluminum 7075-T6. Effects of loading sequence, mean strain or stress, and prestraining were investigated. The behavior of aluminum is shown not to be affected by preloading, whereas the behavior of stainless steel is greatly influenced by prior loading. Mean stress relaxation in strain control and ratcheting in load control and their influence on fatigue life are discussed. Some unusual mean strain test results are presented for SS304L, where in spite of mean stress relaxation fatigue lives were significantly longer than fully-reversed tests. Prestraining indicated no effect on either deformation or fatigue behavior of aluminum, while it induced considerable hardening in SS304L and led to different results on fatigue life, depending on the test control mode. Possible mechanisms for secondary hardening observed in some tests, characterized by a continuous increase in the stress response and leading to runout fatigue life, are also discussed. The Smith–Watson–Topper parameter was shown to correlate most of the experimental data for both materials under different loading conditions.

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