Measurement of the residual stress tensor on the surface of a specimen by layer removal and interferometry: uncertainty analysis

2009 ◽  
Vol 20 (11) ◽  
pp. 115302 ◽  
Author(s):  
J Palma ◽  
R Rivero ◽  
I Lira ◽  
M François
Keyword(s):  
Residual Stress ◽  
Uncertainty Analysis ◽  
Stress Tensor ◽  
Layer Removal

Layer removal analysis of residual stress

1989 ◽  
Vol 24 (10) ◽  
pp. 3521-3528 ◽  
Author(s):  
M. W. A. Paterson ◽  
J. R. White
Keyword(s):  
Residual Stress ◽  
Layer Removal

Revision and extension of the standard laboratory technique for X-ray diffraction measurement of residual stress gradients

2007 ◽  
Vol 40 (4) ◽  
pp. 675-683 ◽  
Author(s):  
Cristy L. Azanza Ricardo ◽  
Mirco D'Incau ◽  
Paolo Scardi
Keyword(s):  
Residual Stress ◽  
Hole Drilling ◽  
Al Alloy ◽  
Diffraction Measurement ◽  
X Ray Diffraction ◽  
Surface Residual Stress ◽  
X Ray ◽  
Stress Gradients ◽  
Layer Removal ◽  
Removal Technique

A new procedure is proposed to determine sub-surface residual stress gradients by laboratory X-ray diffraction measurements at different depths using a chemical layer-removal technique. The standard correction algorithm for stress relaxation due to layer removal is improved by including corrections for X-ray absorption, and by the addition of constraints imposed by the mechanical equilibrium conditions. Besides correcting the data,i.e.providing more reliable through-thickness residual stress trends, the proposed procedure also provides an elastically compatible and plausible estimate of the residual stress inside the component, well beyond the measured region. The application of the model is illustrated for a set of Al-alloy components shot-peened at different Almen intensities. Results are compared with those given by `blind hole drilling', which is an independent and partly destructive method.

Finite Element Modeling for Prediction of Residual Stresses in Fiber Reinforced Metal Matrix Composites

1993 ◽  
Author(s):  
Partha Rangaswamy ◽  
N. Jayaraman
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Residual Stresses ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Matrix Material ◽  
Unit Cell ◽  
Experimental Results ◽  
Matrix Composites ◽  
Layer Removal

Abstract In metal matrix composites residual stresses developing during the cool-down process after consolidation due to mismatch in thermal expansion coefficients between the ceramic fibers and metal matrix have been predicted using finite element analysis. Conventionally, unit cell models consisting of a quarter fiber surrounded by the matrix material have been developed for analyzing this problem. Such models have successfully predicted the stresses at the fiber-matrix interface. However, experimental work to measure residual stresses have always been on surfaces far away from the interface region. In this paper, models based on the conventional unit cell (one quarter fiber), one fiber, two fibers have been analyzed. In addition, using the element birth/death options available in the FEM code, the surface layer removal process that is conventionally used in the residual stress measuring technique has been simulated in the model. Such layer removal technique allows us to determine the average surface residual stress after each layer is removed and a direct comparison with experimental results are therefore possible. The predictions are compared with experimental results of an eight-ply unidirectional composite with Ti-24Al-11 Nb as matrix material reinforced with SCS-6 fibers.

scholarly journals Measurement of the Residual Stress Tensor in a Compact Tension Weld Specimen

2012 ◽  
Vol 53 (4) ◽  
pp. 605-618 ◽  
Author(s):  
Y. Traore ◽  
S. Paddea ◽  
P. J. Bouchard ◽  
M. A. Gharghouri
Keyword(s):  
Residual Stress ◽  
Stress Tensor ◽  
Compact Tension

scholarly journals Residual Stress Tensor Distributions in Cracked Austenitic Stainless Steel Measured by Two-Dimensional X-Ray Diffraction Method

2014 ◽  
Vol 996 ◽  
pp. 128-134 ◽  
Author(s):  
Youichi Saito ◽  
Shunichiro Tanaka
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Stress Tensor ◽  
Equivalent Stress ◽  
Diffraction Method ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Stress Concentrations ◽  
X Ray

The residual stress tensor for cracked austenitic stainless steel was measured by a two-dimensional X-ray diffraction method. Higher von Mises equivalent stress concentrations, attributed to hot crack initiation, were obtained at both crack ends. The stress of 400 MPa at the crack end in the columnar grain region was about two-fold larger than that of 180 MPa in the equiaxed grain region. This difference was caused by a depression in the cast slab.

Determination of the residual stress tensor in textured zirconium alloy by neutron diffraction

2012 ◽  
Vol 421 (1-3) ◽  
pp. 64-72 ◽  
Author(s):  
V.V. Sumin ◽  
I.V. Papushkin ◽  
R.N. Vasin ◽  
А.M. Venter ◽  
А.М. Balagurov
Keyword(s):  
Residual Stress ◽  
Neutron Diffraction ◽  
Stress Tensor ◽  
Zirconium Alloy
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