Evaluation of the Compressive Residual Stress Relaxation Behavior by <i>in situ</i> X-ray Stress Measurement

Comparison of Compressive Stress-Relaxation Behavior

Osteoarthritis (OA) is a common joint disorder found mostly in elderly people. The role 21 of mechanical behavior in the progression of OA is complex and remains unclear. The 22 stress-relaxation behavior of human articular cartilage in clinically defined osteoarthritic stages 23 may have importance in diagnosis and prognosis of OA. In this study we investigated differences 24 in the biomechani...

Effect of Compressive Residual Stress on the Corner Crack Growth

In the present study, plasticity induced crack closure (PICC) concept and three dimensional (3D) finite element methods (FEM) are used to study the effect of compressive residual stress field on the fatigue crack growth from a hole. To investigate the effect of compressive residual stress on crack opening levels and crack shape evolution, Carlson’s experiments were simulated. Crack shape evolut...

Depth-resolved residual stress evaluation from X-ray diffraction measurement data using the approximate inverse method

The paper deals with the depth determination of residual stress states from diffraction data. First an historical overview of the known approaches is given. Then we apply the approximate inverse method to this problem. This method is known to be very efficient and stable with respect to noise-contaminated data. It is even possible to prove convergence and it allows an error estimate of the calc...

Numerical Study of the Effect of Materials’ Plastic Behavior on Equibiaxial Residual Stress Measurement Using Indentation

Indentation is a new method for estimating residual stress. The plastic behavior of the materials under study can affect indentation parameters and, thus, influences the results of residual stress measurement. In this paper, the effect of yield stress and work-hardening exponent on the accuracy of residual stress measurements in steels and aluminums was studied. Results showed that, for m...

Recent Advances in the Measurement of Residual Stress by X-Ray Diffraction