scholarly journals Three-dimensional mapping of the residual stress field in a locally rolled aluminium alloy specimen

2017 ◽  
Vol 26 ◽  
pp. 240-251 ◽  
Author(s):  
H.E. Coules ◽  
G.C.M. Horne ◽  
S. Kabra ◽  
P. Colegrove ◽  
D.J. Smith
Keyword(s):  
Residual Stress ◽  
Stress Field ◽  
Aluminium Alloy ◽  
Three Dimensional ◽  
Residual Stress Field ◽  
Alloy Specimen ◽  
Three Dimensional Mapping ◽  
Dimensional Mapping

scholarly journals S32 Measurement of the Residual Stress Field in an Aluminium Alloy 2014A Component of Complex Geometry

2008 ◽  
Vol 23 (2) ◽  
pp. 190-190
Author(s):  
S. Hossain ◽  
M. Fardi ◽  
D. J. Smith ◽  
C. E. Truman ◽  
U. Stuhr
Keyword(s):  
Residual Stress ◽  
Stress Field ◽  
Aluminium Alloy ◽  
Complex Geometry ◽  
Residual Stress Field

Stress Corrosion Cracking Analysis under Thermal Residual Stress Field Using S-FEM

2011 ◽  
Vol 462-463 ◽  
pp. 431-436 ◽  
Author(s):  
Masanori Kikuchi ◽  
Yoshitaka Wada ◽  
Yuto Shimizu ◽  
Yu Long Li
Keyword(s):  
Residual Stress ◽  
Stress Field ◽  
Crack Growth ◽  
Fracture Behavior ◽  
Three Dimensional ◽  
Stress Fields ◽  
Crack Growth Behavior ◽  
Residual Stress Field ◽  
Energy Agency ◽  
Thermal Stress Field

Fracture in heat affected zone (HAZ) in welding has been a serious problem for the integrity of machines. Prediction of fracture behavior due to the residual stress field in HAZ is important. In this paper, S-Version FEM(S-FEM) is applied to simulate the crack growth under thermal and residual stress fields. For evaluation of stress intensity factor, virtual crack closure integral method (VCCM) is employed. In order to confirm the validity of this analysis, numerical results are compared with previously-reported analytical and experimental results. Then, crack growth analysis in piping structure with welding joint was conducted. The residual stress data was provided by JAEA, Japan Atomic Energy Agency, based on their numerical simulation. Using S-FEM, two- and three-dimensional analyses are conducted, and crack growth behavior under thermal stress field is studied and discussed.

A Comparison of 2D and 3D Fracture Assessments in the Presence of Residual Stresses

2007 ◽  
Author(s):  
Simon J. Lewis ◽  
Christopher E. Truman ◽  
David J. Smith
Keyword(s):  
Residual Stress ◽  
Stress Field ◽  
Structural Integrity ◽  
Three Dimensional ◽  
External Loading ◽  
Assessment Procedure ◽  
J Integral ◽  
Residual Stress Field ◽  
Fracture Parameters ◽  
Three Dimensional Simulations

This paper presents an investigation into the effects of an initial residual stress field on fracture parameters, calculated via an energy-type integral method, in two and three-dimensional simulations. A residual stress field was introduced into a modified single edge notched bend, SEN(B), specimen using an in-plane compression procedure, such that a crack introduced into the specimen experienced opening displacement, even in the absence of external loading. J integral calculation was undertaken using standard two-dimensional area formulations and pointwise three-dimensional formulations, as well as using modified two- and three-dimensional routines developed to provide path independence in the presence of initial strain fields and non-monotonic plastic loading. The paper will describe the application of these modified J-integral techniques and use the results to re-interpret experimental fracture test data obtained from a set of A533B ferritic steel SEN(B) specimens. The implications for structural integrity assessments in the presence of residual stress fields, as well as the calculation route chosen for determination of fracture parameters, were explored in the context of the R6 assessment procedure. In particular, the different levels of conservatism in the assessments resulting from two- and three-dimensional simulations will be highlighted.

Measurement of the residual stress field in MIG-welded Al-2024 and Al-7150 aluminium alloy compact tension specimens

2006 ◽  
Vol 437 (1) ◽  
pp. 46-53 ◽  
Author(s):  
S. Pratihar ◽  
V. Stelmukh ◽  
M.T. Hutchings ◽  
M.E. Fitzpatrick ◽  
U. Stuhr ◽  
...  
Keyword(s):  
Residual Stress ◽  
Stress Field ◽  
Aluminium Alloy ◽  
Compact Tension ◽  
Residual Stress Field ◽  
Al 2024

A 3-D Model for Evaluating the Residual Stress Field Due to Swage Autofrettage

2008 ◽  
Vol 130 (4) ◽  
Author(s):  
J. Perry ◽  
M. Perl
Keyword(s):  
Residual Stress ◽  
Stress Field ◽  
Three Dimensional ◽  
Weight Ratio ◽  
Computer Code ◽  
Residual Stress Field ◽  
Three Dimensional Model ◽  
Equilibrium Equations ◽  
Von Mises ◽  
Experimental Findings

In order to maximize the performance of modern gun barrels in terms of strength-to-weight ratio and total fatigue life, favorable compressive residual stresses are introduced to the inner portion of the barrel, commonly by the autofrettage process. There are two major autofrettage processes for overstraining the tube: the hydrostatic and the swage. There are several theoretical solutions for hydrostatic autofrettage based on Lamé’s solution and the von Mises or Tresca yield criteria. The residual stress field due to hydraulic autofrettage is treated as an axisymmetric two-dimensional problem solved in terms of the radial displacement solely. Once the Bauschinger effect was included in these models they yield very realistic results. Unlike in the case of hydraulic autofrettage, swage autofrettage needs to be modeled by a three-dimensional model. The present analysis suggests a new 3-D axisymmetric model for solving the residual stress field due to swage autofrettage in terms of both the radial and the axial displacements. The axisymmetric equilibrium equations are approximated by finite differences and solved then by Gauss–Seidel method. Using the new computer code the stresses, the strains, the displacements, and the forces are determined. A full-scale instrumented swage autofrettage test was conducted and the numerical results were validated against the experimental findings. The calculated strains, the permanent bore enlargement, and the mandrel pushing force were found to be in very good agreement with the measured values.

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