대한용접접합학회:학술대회논문집 (Proceedings of the KWS Conference)
- 대한용접접합학회 2002년도 Proceedings of the International Welding/Joining Conference-Korea
- /
- Pages.244-249
- /
- 2002
Prediction of Liquation Crack Initiation at HAZ of Laser Weldment Based on Strain Analysis at Elevated Temperature
- Yamamoto, Motomichi (Department of Social and Environmental Engineering, Graduate School of Engineering, Hiroshima University) ;
- Shinozaki, Kenji (Department of Mechanical System Engineering, Graduate School of Engineering, Hiroshima University) ;
- Kitamura, Mitsuru (Department of Social and Environmental Engineering, Graduate School of Engineering, Hiroshima University) ;
- Shirai, Makoto (National Space Development Agency of Japan)
- 발행 : 2002.10.01
초록
The purpose of this study is to develope the prediction method of liquation crack initiation in HAZ of laser weldment. Thermal two dimensional strain analyses were performed by FEM for bead-on-plate welding in order to obtain the plastic strain at elevated temperature in HAZ of the laser weldment. From these results, it became clear that the plastic strain at elevated temperature affected liquation crack initiation in HAZ, and it could be proposed that the critical strain, which controlled liquation crack initiation, existed. Moreover, an attempt was made to develop thermal and dynamic three dimensional strain analysis method for the laser weldment in order to obtain the plastic strain at elevated temperature in HAZ of the laser weldment in more detail and precisely.
키워드