특집(特輯) 논문(論文): `11 춘계학술대회 우수 논문 ; 수중운동체 적용을 위한 샌드위치 복합재 원통의 좌굴 해석 및 시험 = Selected Papers From the 2011 Spring Meeting of KSCM : Buckling Analysis and Test of Composite Sandwich Cylinder for Underwater Application

국문 초록 (Abstract)

본 연구에서는, 복합재 샌드위치를 수중운동체용 구조물에 적용하기 위한 기초연구로서, 샌드위치 복합재 원통의 제작, 좌굴 해석 및 시험 방법, 중량저감 효과를 분석하였다. 우선 면재에 주름이 생기지 않도록 하는 2단계 샌드위치 제작 방법을 소개하고, 이를 사용하여 원통을 제작하여 수압시험을 수행하였다. 동시에 MSC Nastran의 쉘요소와 고체요소를 사용한 유한요소해석을 수행하여 시험결과와 비교하였다. 시험과 해석의 결과 비교로부터 선형 유한요소해석으로도 샌드위치 원통의 좌굴압력을 3% 내외의 오차로 정확히 예측할 수 있음을 확인하였다. 또한 필라멘트 와인딩 원통에 대한 인자연구를 통해 샌드위치를 사용할 경우 동일한 지지압력에서 필라멘트 와인딩 원통보다 최소 30% 이상 무게가 줄어드는 것을 확인하였다.

다국어 초록 (Multilingual Abstract)

In this paper, as a basic research to apply the composite sandwich to underwater vehicle, the manufacturing, analysis and test methods, and weight saving effect of a composite sandwich cylinder under external pressure were studied. A two-step manufacturing method to prevent the wrinkling of the sandwich cylinder face was proposed and the three cylinders were made and tested. Finite element results based on the shell and solid model using MSC.Nastran were compared with test results. The comparison showed that the linear finite element analysis using the shell and solid elements can predict the buckling pressure of the sandwich cylinder with approximately 3% difference. The parametric study of the filament wound cylinders revealed that the composite sandwich can reduce the weight of the cylinder more than 30% compared with the filament wound cylinder supporting the same pressure.

참고문헌 (Reference)

1 이헌곤, "잠수함 국외 기술 동향" 44 (44): 3-6, 2007

2 "우리의 해군 (2011년 7월 [2011년 3월 29일 검색]). “잠수함의 스텔스 기술” [온라인게시물]"

3 G. Gusic, "The Influence of Circumferential Thickness Variations on the Buckling of Cylindrical Shells under External Pressure" 74 (74): 461-477, 2000

4 J. R. Vinson, "The Behavior of Sandwich Structures of Isotropic and Composite Materials" Technomic Pub. Co 1999

5 M. Buragohain, "Study of Filament Wound Grid-stiffened Composite Cylindrical Structures" 93 (93): 1031-1038, 2011

6 R. Zhou, "Sound Transmission Loss of Foam-Filled Honeycomb Sandwich Panels using Statistical Energy Analysis and Theoretical and Measured Dynamic Properties" 329 (329): 673-686, 2010

7 W. C. Huang, "Sound Insulation Improvement using Honeycomb Sandwich Panels" 53 (53): 163-177, 1998

8 S. H. Hur, "Postbuckling of composite cylinders under external hydrostatic pressure" Elsevier BV 86 (86): 114-124, 200811

9 J. J. Sargianis, "Noise Mitigation and Wave Number Characterization in Sandwich Structures" 129 (129): 2416-, 2011

10 "MSC NASTRAN User’s Guide"

11 V. P. Veedu, "Finite-Element Buckling Analysis of Sandwich Columns Containing a Face/core Debond" 69 (69): 143-148, 2005

12 W. Szyc, "Elastic Buckling of an Axially Compressed Sandwich Cylindrical Panel with Three Edges Simply Supported and One Edge Free" 44 (44): 910-918, 2006

13 H. L. T. Nguyen, "Buckling under the External Pressure of Cylindrical Shells with Variable Thickness" 46 (46): 4163-4168, 2009

14 G. A. Kardomateas, "Buckling of Sandwich Wide Columns" 37 (37): 1239-1247, 2002

15 C. J. Moon, "Buckling of Filament Wound Composite Cylinders Subjected to Hydrostatic Pressure for Underwater Vehicle Applications" 92 (92): 2241-2251, 2010

16 A. Muc, "Buckling and Failure Analysis of FRP Faced Sandwich Plates" 48 (48): 145-150, 2000

17 M. Yazdani1, "An Experimental Investigation into the Buckling of GFRP Stiffened Shells under Axial Loading" 4 (4): 914-920, 2009

18 G. A. Kardomateas, "An Elasticity Solution for the Global Buckling of Sandwich Beams/Wide Panels With Orthotropic Phases" 77 (77): 15-21, 2010

19 C. T. F. Ross, "A Conceptual Design of an Underwater Vehicle" 33 : 2087-2104, 2006