It is important to analyse the casting product and the mold at the same time considering thermal contraction of the casting and thermal expansion of the mold. The analysis considering contact of the casting and the mold induces the precise prediction of stress distribution and the defect such as hot tearing. But it is difficult to generate FEM mesh for the interface of the casting and the mold. Moreover the mesh for the mold domain spends lots of computational time and memory for the analysis due to a number of meshes. Consequently we proposed the virtual mold technique which only uses mesh of the casting part for thermal stress analysis in casting process. The spring bar element in virtual mold technique is used to consider the contact of the casting and the mold. In general, a volume of the mold is much bigger than that of casting part, so the proposed technique decreases the number of mesh and saves the computational memory and time greatly. In this study, the proposed technique was verified by the comparison with the traditional contact technique on a specimen. And the proposed technique gave satisfactory results.
参考文献
| [1] | R.H.Tien;V.Koump .[J].ASME Journal of Applied Mechanics,1969,36:763. |
| [2] | R W Lewis;B R Bass.[J].Trans ASTM,1976(08):479. |
| [3] | J.R.Williams;R.W.Lewis;K.Morgan .[J].International Journal for Numerical Methods in Engineering,1978,14:19. |
| [4] | A.Yosida;S.Nagaki;T.Inoue .[J].Journal of the Society of Materials Science Japan,1982,31(348):897. |
| [5] | H Huang;J L Hill;V K Suri;J T Berry.[A].,1990:65-70. |
| [6] | G.Fortin;P.Louchez;F.H.Samuel.[J].AFS Transactions,1992:863. |
| [7] | R.Song;G.Dhatt;A.B.Cheikh .[J].International Journal for Numerical Methods in Engineering,1990,30:579. |
| [8] | K.Y.Kim .[J].ISIJ International,2003,43:647. |
| [9] | B G Thomas.[A].,1993:519. |
| [10] | J.W.Kang;B.C.Liu;S.M.Xiong .[J].Journal of Materials Science and Technology,1999,15(03):267. |
| [11] | Zhibo DONG,Yanhong WEI,Renpei LIU,Zujue DONG.Three Dimensional Numerical Simulation for the Driving Force of Weld Solidification Cracking[J].材料科学技术学报（英文版）,2005(03):399-402. |
| [12] | M.Rappaz;J.M.Drezet .A new hot-tearing criterion[J].Metallurgical and materials transactions. A, physical metallurgy and materials science,1999(2):449-455. |
| [13] | C.Monroe;C.Beckermann.[J].Materials Science and Technology,2005:47. |
| [14] | H.M.Si;C.Cho;S.Y.Kwak .[J].Journal of Materials Processing Technology,2003,133:311. |
| [15] | S.Y.Kwak;C.H.Lim;J.H.Hong;J.K.Choi N.Arai .[J].J Computational Fluid Dynamics,2004,12(04):638. |
| [16] | D L Logan.A First Course in Finite Element Method Using Algor[M].,1997 |
| [17] | High-Temperature Property Data.[J].Ferrous Alloys ASM Int,1988 |
| [18] | ASM Handbook,Properties and Selection:Irons,Steels,and High-Performance Alloys[J].ASM International,1990:628. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%