タイトル | An Accelerated Explicit Method with Two-Stage Computation Scheme for Transient Thermal Stress and Welding Deformation |
著者(日) | 麻, 寧緒 |
著者(英) | Ma, Ninshu |
著者所属(日) | 大阪大学接合科学研究所 |
著者所属(英) | Joining and Welding Research Institute, Osaka University |
発行日 | 2015-06 |
発行機関など | Joining and Welding Research Institute, Osaka University 大阪大学接合科学研究所 |
刊行物名 | Transactions of JWRI |
巻 | 44 |
号 | 1 |
開始ページ | 31 |
終了ページ | 40 |
刊行年月日 | 2015-06 |
言語 | eng |
抄録 | An accelerated explicit method with two-stage computation scheme is developed for simulating transient thermal 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. |
内容記述 | Physical characteristics: Original contains color illustrations 形態: カラー図版あり |
キーワード | Accelerated explicit method; Two-stage computation scheme; Transient radial eigenvalue; stabilization computation; Thermal stress; Welding deformation |
資料種別 | Technical Report |
NASA分類 | Structural Mechanics |
ISSN | 0387-4508 |
NCID | AA00867058 |
SHI-NO | AA1540303007 |
URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/556455 |