Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Efficient Methods of Prediction Incorporating Equivalent Models for Elasto-Plastic Bending Behavior of Metallic Sandwich Plates with Inner Dimpled Shell Structure

등가형상을 이용한 딤플형 금속 샌드위치 판재의 효율적 굽힘 거동 예측

  • 성대용 (한국과학기술원 기계공학과 대학원) ;
  • 정창균 (한국과학기술원 기계공학과 대학원) ;
  • 윤석준 (한국과학기술원 기계공학과 대학원) ;
  • 양동열 (한국과학기술원 기계공학과)
  • Published : 2005.11.01
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Abstract

An efficient finite element method has been introduced for analysis of metallic sandwich plates subject to bending moment. A full model 3-point bending FE-analysis shows that the plastic behavior of inner structures appears only at the load point. The unit structures of sandwich plates are defined to numerically calculate the bending stiffness and strength utilizing the recurrent boundary condition for pure bending analysis. The equivalent models with the same bending stiffness and strength of full models are then designed analytically. It is demonstrated that the results of both models are almost the same and the FE-analysis method incorporating the equivalent models can reduce the computation time effectively. The dominant collapse modes are face buckling and face yielding. Since the inner dimpled structures prevent face buckling, sandwich plates with inner dimpled shell structure can absorb more energy than other types of sandwich plates during the bending behavior.

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References

  1. H. N. G. Waldley, 2003, Fabrication and structural performance of periodic cellular metal sandwich structures, Compos. Sci. Technol., Vol. 63, pp. 2331-2343 https://doi.org/10.1016/S0266-3538(03)00266-5
  2. F. W. Zok, S. A. Waltner, Z. Wei, H. J. Rathbun, R. M. McMeeking, A. G. Evans, 2004, A protocol for characterizing the structural performance of metallic sandwich panels: application to pyramidal truss cores, International Journal of Solids and Structures, Vol. 40, pp. 6249-6271
  3. 김지용, 김종호, 정완진, 2005, 샌드위치 강판의 전단가공에 있어서 전단면에 미치는 금형설계 변수의 영향, 한국소성가공학회지, 제 14 권 제 1 호, pp. 37-42 https://doi.org/10.5228/KSPP.2005.14.1.037
  4. 김지용, 김종호, 정완진, 양동열, 2005, 접합판재의 전단변형거동에 관한 연구, 한국소성가공학회지, 제 14 권 제 3 호, pp. 257-262 https://doi.org/10.5228/KSPP.2005.14.3.257
  5. J. Hohe, W. Becker, 2001, An energetic homogenization procedure for the elastic properties of general cellular sandwich cores, Composites: Part B, Vol. 32, pp. 185-197 https://doi.org/10.1016/S1359-8368(00)00055-X
  6. X. F. Xu, P. Qiao, 2002, Homogenized elastic properties of honeycomb sandwich with skin effect, International Journal of Solids and Structures, Vol. 39, pp. 2153-2188 https://doi.org/10.1016/S0020-7683(02)00111-7
  7. 성대용, 정창균, 윤석준, 2005, 굽힘 하중을 받는 딤플형 금속 샌드위치판재의 최적설계, 한국정밀공학회 춘계학술대회논문집, pp. 130- 133
  8. 정창균, 윤석준, 성대용, 양동열, 안동규, 2004, 피라미드 구조를 가지는 초경량 금속 내부구조 접합판재의 제작 및 특성평가, 정밀공학회 추계학술대회논문집 , pp. 483-486
  9. 안동규, 이상훈, 김민수, 한길영 , 정창균, 양동열, 2004, ISB 판넬의 굽힘강성 및 파단특성 에 관한 연구, 한국정말공학회 추계학술대회논문집, pp. 1274-1277