Journal of Computational Science and Technology | |
Predicting Locations of Defects in the Solidification Process for Large-Scale Cast Steel | |
Nao-Aki NODA1  Yasunori TASHIRO2  Kouji TAKENOUCHI2  Shuji EGAWA1  | |
[1] Kyushu Institute of Technology, Department of Mechanical Engineering;Japan Casting & Forging Corporation | |
关键词: Thermal Stress; Finite Element Method; Plasticity; Cast Steel; Crack; | |
DOI : 10.1299/jcst.3.242 | |
学科分类:地球科学(综合) | |
来源: Japan Academy | |
【 摘 要 】
References(7)The large-scale cast steel has been used in broad fields of industries, such as power generation, construction, vessels, and automobiles. In the solidification process of a hummer used for press machine, for example, sometimes defects such as shrinkage cavity, segregation and cracks appear at hummer's surface. Shrinkage cavity and segregation can be predicted by performing non-steady state heat transfer analysis; and therefore such two types of defects can be eliminated by using chills which control solidification process. However, uneven cooling rates at different regions of the large-scale cast steel generate thermal stresses, which cause solidification cracks, between the chills. For causing those cracks, thermal stress may be important; however, there have been few studies for this thermal stress analysis. In this study, a three dimensional thermal elastic-plastic stress analysis has been performed by using finite element method in connection with three dimensional non-steady state heat transfer analysis, including interaction between the temperature and stress field. The results provide further understanding of the observed solidification crack failure for large-scale cast steel.
【 授权许可】
Unknown
【 预 览 】
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RO201912010158468ZK.pdf | 1400KB | download |