Stress-relief annealing (SR treatment) is often applied to relieve welding residual stresses in the fabrication process of pressure vessels, etc. This study aims at development of an efficient method as simple as hand calculation to estimate reduction of residual stresses of very thick welded joint by SR treatment. In the first report, an estimating method was developed for relaxation tests, in uniaxial stress state, at changing and constant temperatures because the stress relaxation phenomenon is considerably similar to that observed in the SR treatment of a joint. In this report, the stresses relaxed by SR treatment in a very thick welded joint are analyzed accurately by the finite element method based on thermal elastic-plastic-creep theory. The characteristics of the changes of the welding residual stresses in multiaxial stress state are studied in detail for further development of the estimating method to SR treatment of a very thick welded joint, of which the stress state and boundary condition are very complex.

Issue Section:
Research Papers
Topics:
Annealing, Residual stresses, Stress, Welded joints, Welding, Relaxation (Physics), Boundary-value problems, Creep, Finite element methods, Manufacturing, Pressure vessels, Temperature
1.
Michaleris, P., Feng, Z., and Campbell, G., 1997, “Evaluation of 2D and 3D FEA Models for Predicting Residual Stress and Distortion,” Approximate Methods in the Design and Analysis of Pressure Vessels and Piping Components—1997, ASME, pp. 91–102.
2.
Nakacho
K.
, and
Ueda
Y.
,
1996
, “
A Simple Estimating Method for Reduction of Welding Residual Stresses in Thick Welded Joint From Stress-Relief Annealing—Part I: Development of the Analytical Method for Relaxation Tests and Its Applicability
,”
ASME JOURNAL OF PRESSURE VESSEL TECHNOLOGY
, Vol.
118
, pp.
343
–
350
.
3.
Ueda
Y.
, and
Fukuda
K.
,
1975
a, “
Application of Finite Element Method for Analysis on Process of Stress Relief Annealing
” (in Japanese),
Journal of JWS
, The Japan Welding Society, Vol.
44
, No.
11
, pp.
902
–
908
.
4.
Ueda
Y.
, and
Fukuda
K.
,
1975
b, “
Analysis of Welding Stress Relieving by Annealing Based on Finite Element Method
,”
Trans. JWRI
, Welding Research Institute of Osaka University, Japan, Vol.
4
, No.
1
, pp.
39
–
45
.
5.
Ueda
Y.
, and
Fukuda
K.
,
1977
a, “
Application of Finite Element Method for Analysis on Process of Stress Relief Annealing
,”
Trans. JWS
, The Japan Welding Society, Vol.
8
, No.
1
, pp.
19
–
25
.
6.
Ueda
Y.
,
Takahashi
E.
,
Fukuda
K.
,
Sakamoto
K.
, and
Nakacho
K.
,
1976
a, “
Multipass Welding Stresses in Very Thick Plates and Their Reduction from Stress Relief Annealing
,”
Trans. JWRI
, Welding Research Institute of Osaka University, Japan, Vol.
5
, No.
2
, pp.
179
–
189
.
7.
Ueda, Y., Fukuda, K., Nakacho, K., Takahashi, E., and Sakamoto, K., 1976b, “Transient and Residual Stresses from Multipass Weld in Very Thick Plates and Their Reduction from Stress Relief Annealing,” Proceedings, Third International Conference on Pressure Vessel Technology, ASME, Part II, pp. 925–933.
8.
Ueda, Y., Fukuda, K., and Nakacho, K., 1977b, “Basic Procedures in Analysis and Measurement of Welding Residual Stresses by the Finite Element Method,” Proceedings, International Conference on Residual Stresses in Welded Construction and Their Effects, TWI, pp. 27–37.
9.
Ueda
Y.
,
Takahashi
E.
,
Fukuda
K.
,
Sakamoto
K.
, and
Nakacho
K.
,
1978
, “
Mechanical Behavior of Multipass Welded Joint during Stress Relief Annealing
” (in Japanese),
Journal of JWS
, The Japan Welding Society, Vol.
47
, No.
8
, pp.
500
–
506
.
10.
Ueda
Y.
, and
Nakacho
K.
,
1984
, “
Simplifying Analysis and Experimental Methods of Multipass Welding Stress in Very Thick Plates Based on Special Characteristic of Its Production Mechanism
” (in Japanese),
Quarterly Journal of JWS
, The Japan Welding Society, Vol.
2
, No.
1
, pp.
75
–
82
.
This content is only available via PDF.
Copyright © 1999
 by The American Society of Mechanical Engineers
You do not currently have access to this content.