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Using finite difference method to simulate casting thermal stress 被引量:6

Using finite difference method to simulate casting thermal stress
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摘要 Thermal stress simulation can provide a scientific reference to eliminate defects such as crack,residual stress centralization and deformation etc.,caused by thermal stress during casting solidification.To study the thermal stress distribution during casting process,a unilateral thermal-stress coupling model was employed to simulate 3D casting stress using Finite Difference Method(FDM),namely all the traditional thermal-elastic-plastic equations are numerically and differentially discrete.A FDM/FDM numerical simulation system was developed to analyze temperature and stress fields during casting solidification process.Two practical verifications were carried out,and the results from simulation basically coincided with practical cases.The results indicated that the FDM/FDM stress simulation system can be used to simulate the formation of residual stress,and to predict the occurrence of hot tearing.Because heat transfer and stress analysis are all based on FDM,they can use the same FD model,which can avoid the matching process between different models,and hence reduce temperature-load transferring errors.This approach makes the simulation of fluid flow,heat transfer and stress analysis unify into one single model. Thermal stress simulation can provide a scientific reference to eliminate defects such as crack, residual stress centralization and deformation etc., caused by thermal stress during casting solidification. To study the thermal stress distribution during casting process, a unilateral thermal-stress coupling model was employed to simulate 3D casting stress using Finite Difference Method (FDM), namely all the traditional thermal-elastic-plastic equations are numerically and differentially discrete. A FDM/FDM numerical simulation system was developed to analyze temperature and stress fields during casting solidification process. Two practical verifications were carried out, and the results from simulation basically coincided with practical cases. The results indicated that the FDM/FDM stress simulation system can be used to simulate the formation of residual stress, and to predict the occurrence of hot tearing. Because heat transfer and stress analysis are all based on FDM, they can use the same FD model, which can avoid the matching process between different models, and hence reduce temperature-load transferring errors. This approach makes the simulation of fluid flow, heat transfer and stress analysis unify into one single model.
出处 《China Foundry》 SCIE CAS 2011年第2期177-181,共5页 中国铸造(英文版)
基金 supported by the National Natural Science Foundation of China (No.50805056) New Century Excellent Talents in University (No.NCET-09-0396) the Scientific Research Foundation for the Returned Overseas Chinese Scholars,Ministry of Education (2009)
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  • 1平学成,陈梦成,谢基龙,李强.基于新型裂尖杂交元的压电材料断裂力学研究[J].力学学报,2006,38(3):407-413. 被引量:9
  • 2徐艳,康进武,黄天佑.接触单元在铸件铸造过程应力数值模拟中的应用[J].铸造技术,2006,27(5):506-510. 被引量:11
  • 3郑贤淑,姚山,金俊泽.铸型阻碍应力计算模型研究[J].大连理工大学学报,1996,36(6):687-691. 被引量:4
  • 4曹广军,陈立亮.基于FDM/FEM联合的铸件凝固过程热应力数值模拟的研究[J].铸造技术,2007,28(7):987-990. 被引量:9
  • 5LESKI A. Implementation ofthe virtual crack closure tech- nique in engineering FE calculations[J]. Finite Element in Analysis and Design, 2007,43 (3) : 261- 268.
  • 6FRIES T P, BELYTSCHKO T. The extended/ generalized fi- nite element method : An overview of the method and its appli- cations[J]. International Journal for Numerical Methods in En- gineering, 2010, 84(3):253-304.
  • 7RYBICKI E F, KANNINEN M F. A finite element calculation of stress intensity factors by a modified crack closure integral [J]. Engineering Fracture Mechanics, 1977, 9: 931-938.
  • 8RAJU I S. Calculation of strain-energy release rates with high- order and singular finiteelements[J]. Engineering Fracture Mechanics, 1987,28: 251-274.
  • 9XIE D, BIGGERSJR S B. Calculation of transient strain ener- gy release rates under impact loading based on the virtual crack closure technique[J]. International Journal of Impact Engi- neering, 2007, 34(6) : 1047-1060.
  • 10XIE D, BIGGERSJR S B. Progressive crack growth using in- terface element based on the virtual crack closure technique [J]. Finite Elements in Analysis and Design, 2006, 42 (11): 977-984.

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