A Study on the Distribution of Residual Stress Due to Surface Induction Hardening

1996 ◽  
Vol 118 (4) ◽  
pp. 571-575 ◽  
Author(s):  
Dong-hui Xu ◽  
Zhen-Bang Kuang
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Induction Hardening ◽  
Calculation Model ◽  
Residual Stress Distribution ◽  
Experimental Measurements ◽  
Transformation Induced Plasticity ◽  
Heat Effects ◽  
Surface Induction

A finite element method (FEM) is used here to analyse the distribution of residual stresses generated by surface induction hardening. The analysis considers both transformation induced plasticity (TRIP) and latent heat effects. The calculation model considering TRIP is found to improve the agreement with experimental measurements significantly. From a large number of numerical results, a set of simple formulas is derived to predict the residual stress distribution in the workpiece.

Residual Stresses in Self-Curing Bone Cement During Hip Arthroplasty

2003 ◽  
Author(s):  
Chaodi Li ◽  
Ying Wang ◽  
James J. Mason
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Residual Stresses ◽  
Hip Arthroplasty ◽  
Experimental Tests ◽  
Cement Mantle ◽  
Joint Arthroplasty ◽  
Residual Stress Distribution ◽  
Bone Cements

Bone cements are widely used to fix prostheses into bones for joint arthroplasty. During cement curing in total hip arthroplasty, residual stresses are introduced in the cement mantle. A finite element method was developed to predict such residual stress built-up. The effects of curing history on the residual stress distribution were investigated. Results showed that the predictions of the residual stresses agreed with the experimental tests very well. The residual stress build-up was shown to depend on the curing history. By preheating the prosthesis stem prior to implantation, a desired low level residual stress at the critical interface was obtained.

Influence of Cooling Intensity on Residual Stress State of TIG Dressing Zone for T-Joint Welded Toe

2011 ◽  
Vol 148-149 ◽  
pp. 1289-1294 ◽  
Author(s):  
Kun Zhou ◽  
Chun Yuan Shi ◽  
Cheng Jin
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Stress State ◽  
Residual Stresses ◽  
Residual Stress Distribution ◽  
Residual Stress State ◽  
Cooling Intensity ◽  
Stress Layer ◽  
Spray Treatment

Using finite element method, the residual stress distribution of the TIG dressed welded toe followed by spray treatment with different cooling intensity was calculated. And the residual stresses of welded toe were also measured by using the blind-hole method. The results indicate that with the increase of cooling intensity, the longitudinal residual stresses in welded toe are gradually transited from tensile residual stresses to compressive ones, and there is no significant change for transverse residual stresses, and the depth of compressive stress layer increases at the welded toe region.

Development of a Program for Predicting Residual Stress Distribution in Multi-Stacked Film

2001 ◽  
Author(s):  
Hyeon Chang Choi ◽  
Jun Hyub Park ◽  
Yong Soo Park
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Stress Distribution ◽  
Prediction Method ◽  
Residual Stress Distribution ◽  
Residual Stress Field ◽  
Finite Element Program ◽  
Polysilicon Film ◽  
Element Method

Abstract The mean stresses of the single and multi-stacked film are experimentally investigated. After stacking several layers on a wafer, we measure the curvature on the wafer. Followed by peeling each layer stacked, we measure the curvature on the wafer, again. Mean residual stresses are calculated from radiuses of the curvatures using the Stoney’s equation[1]. Microcantilever beams is constructed by removing substrate and the deflection at the end of a beam is measured. Finite element method for determining residual stress distribution in multi-stacked films with a multi-step doping process is studied for use in micromachining applications. We propose a finite element program for residual stress analysis (RESA) in multi-stacked polysilicon film. The distribution of residual stress field in multi-stacked films is predicted using RESA. And it is established for the prediction method determining the deflection in a cantilever beam using finite element method (FEM).

Influence of Initial Temperature of Chilling Treatment on Residual Stress State of TIG Dressing Zone for T-Joint Welded Toe

2012 ◽  
Vol 268-270 ◽  
pp. 529-533
Author(s):  
Chun Yuan Shi ◽  
Ping Zhu ◽  
Kun Zhou
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Aluminum Alloy ◽  
Residual Stresses ◽  
Initial Temperature ◽  
Residual Stress Distribution ◽  
Residual Stress State ◽  
Significant Change ◽  
Chilling Treatment

Using finite element method, the residual stress distribution of TIG dressed welded toe followed by chilling treatment with different temperature of steel and aluminum alloy T-joint was calculated. And the residual stresses of welded toe were also measured by using the blind-hole method. The results indicate that with the increase of initial temperature of chilling treatment, the longitudinal residual stresses in welded toe of steel joint are gradually transited from tensile residual stresses to compressive ones, and there is no significant change for transverse residual stresses; and the longitudinal residual stresses in welded toe of aluminum alloy joint are compressive stress and gradually increased, no significant change for transverse residual stresses.

Prediction of Tablet Characteristics from Residual Stress Distribution Estimated by the Finite Element Method

2013 ◽  
Vol 102 (10) ◽  
pp. 3678-3686 ◽  
Author(s):  
Yoshihiro Hayashi ◽  
Takahiro Miura ◽  
Takuya Shimada ◽  
Yoshinori Onuki ◽  
Yasuko Obata ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Stress Distribution ◽  
Residual Stress Distribution ◽  
The Finite Element Method ◽  
Element Method

Investigation of Residual Stresses Caused by Welding, Cladding and Tempering of Reactor Pressure Vessels

2003 ◽  
Author(s):  
V. I. Kostylev ◽  
B. Z. Margolin ◽  
A. Y. Varovin ◽  
E. Keim
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Stress Distribution ◽  
Weld Metal ◽  
Pressure Vessels ◽  
Residual Stress Distribution ◽  
Stress Fields ◽  
The Finite Element Method ◽  
Reactor Pressure

Calculations of residual stress fields, which arise after welding, cladding and tempering, were performed as applied to reactor pressure vessels (RPVs) of WWER types. These calculations are based on a procedure, which takes into account Feα↔Feγ transformation happening in base and weld metal under welding and cladding, and also creep during tempering. The procedure is based on solutions of the temperature and non-isothermal elasto-plastic problem with and without creep by the finite element method. On the basis of the performed investigation it is shown that Feα↔Feγ transformation may affect the residual stress distribution. An analysis of cases has been performed for which the above effect is strong and for which this effect may be ignored. On the basis of the calculation performed, an engineering procedure is proposed that allows to determine the residual stress fields in welds of the WWER-440 and WWER-1000 for various durations of post-weld tempering.

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