An Accelerated Explicit Method with a Two-Stage Computation Scheme for Transient Thermal Stress and Welding Deformation

Ma, Ninshu

Transactions of JWRI, 2015, 44(1), 31-40

Number of Access:468（2025-07-18 10:00 Counts）

Identifier to cite or link to this item: https://doi.org/10.18910/57260

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Title
An Accelerated Explicit Method with a Two-Stage Computation Scheme for Transient Thermal Stress and Welding Deformation
Creator
NRID
1000010263328 1000010263328
ORCID
0000-0002-8088-4154 0000-0002-8088-4154
researchmap permalink
ma.ninshu ma.ninshu
Scopus Author ID
36343934100 36343934100
CreatorName
Ma, Ninshu
Subject
Accelerated explicit method
Two-stage computation scheme
Transient radial eigenvalue
stabilization computation
Thermal stress
Welding deformation
Abstract
An accelerated explicit method with two-stage computation scheme is developed for simulating transient thermasl stress and deformation occurring in a long time welding heating and cooling process. The first computation stage is based on a dynamic explicit method considering the characteristics of the welding mechanical process by controlling both the temperature increment and time scaling parameter. In the second computation stage, a static equilibrium computation scheme is implemented after dynamic thermal loading to obtain a static solution of transient thermal stress and welding deformation. In the two-stage computation scheme, a damping parameter was determined based on a transient radial eigenvalue, which corresponds to a transient welding deformation and is automatically computed using the mass center velocity of the finite element model. The validity of the accelerated explicit method is verified by comparing the transient thermal deformation and residual stresses with those computed by the implicit FEM and experimental measurements.
Publisher
大阪大学接合科学研究所
オオサカ ダイガク セツゴウ カガク ケンキュウジョ
Joining and Welding Research Institute, Osaka University
Source Title
Transactions of JWRI
Volume (Issue)
44(1)
Page
31-40
Date of Issued
2015-06
Language
English
Handle URL
https://hdl.handle.net/11094/57260
DOI
https://doi.org/10.18910/57260
PISSN
03874508
NCID
AA00867058
Access Rights
open access
oaire:version
Version of Record
Category
紀要論文 Departmental Bulletin Paper
Transactions of JWRI / Vol.44 No.1 (2015-06)