Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Analysis of 3-D Superplastic Forming/Diffusion Bonding Process Using a Hierarchical Contact Searching Method(I)

계층적 접촉 탐색방법을 이용한 3-D 초소성 성형/확산접합의 공정설계(I)

  • Published : 2007.04.01
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Abstract

Superplastic forming/diffusion bonding (SPF/DB) processes were analyzed using a 3-D rigid visco-plastic finite element method. A constant-triangular element based on membrane approximation and an incremental theory of plasticity are employed for the formulation. The coulomb friction law is used for interface friction between tool and material. Pressure-time relationship for a given optimal strain rate is calculated by stress and pressure values at the previous iteration step. In order to improve the contact searching, hierarchical search algorithm has been applied and implemented into the code. Various geometries including sandwich panel and 3 sheet shape for 3-D SPF/DB model are analyzed using the developed program. The validity fer the analysis is verified by comparison between analysis and results in the literature.

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References

  1. S. C. Rama, N. Chandra, 1991, Development of a pressure prediction method for superplastic forming processes, Int. J. Non-Linear Mechanics, Vol. 26, No.5, pp.711-725 https://doi.org/10.1016/0020-7462(91)90022-L
  2. R. C. Ramma, N. Chandra, R. E.Goforth, 1993, Numerical modeling of 3D superplastic sheet forming processes, Advances in Superplasticity and Superplastic Forming, N. Chandra, H. Garmestani and R. E. Goforth eds., TMS, pp. 133-154
  3. J. Bonet, P. Bhargava, R. D. Wood, 1992, Finite Element Simulation of 3-Dimensional Superplastic Forming with Diffusion Bonding, Proc. NUMIFORM 92, J.L.Chenot et al, eds., pp. 843-849
  4. J. H. Cheng, S. Lee, 1994, Methods for resolving grooving problems in parts manufactured from combined diffusion bonding and superplastic forming processes, Journal of Materials Processing Technology, Vol. 45, pp. 249-254 https://doi.org/10.1016/0924-0136(94)90348-4
  5. 홍성석, 김용환, 이종수, R. H. Wagoner, 1993, 강-점소성 유한요소법을 이용한 초소성 성형공정 해석(I)-초소성 벌지 성형, 대한기계학회 논문집, 제 17권 제4호, pp. 796-805
  6. M. Bellet, J. L. chenot, 1989, Numerical Modelling of shin sheet Superplastic Forming, Proc. NUMIFORM 89, E.G. Thompson et. al. eds., pp. 401-406
  7. K. S. Lee, H. Huh, 1999, Simulation of superplastic forming/diffusion bonding with finite-element analysis using the convective coordinate system, Journal of Material Processing Technology, pp. 92-98
  8. 김일권, 김용환, 2000, 계층적 접촉 탐색방법을 이용한 박판성형 공정해석, 한국소성가공학회지, 제 9권, 제 3호, pp. 274-283
  9. Jong-Hoon Yoon, Ho-Song Lee, Yeong-Moo Yi, Young-Soon Jang, 2007, Finite element analysis on superplastic blow forming of Ti-6AI-4V multi-sheets, Materials Science Forum, Vol. 546-549, pp. 1361-1366