Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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A New Method to Determine the Characteristic Lengths for the Failure Analysis of Composite Joint

복합재 체결부의 파손해석을 위한 새로운 특성길이 결정 방법

  • 안현수 (경상대학교 대학원 항공공학과) ;
  • 권진희 (경상대학교 기계항공공학부·항공기부품기술연구소) ;
  • 최진호 (경상대학교 기계항공공학부·항공기부품기술연구소)
  • Published : 2003.08.01
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Abstract

Proposed is a new method to determine the characteristic lengths for the failure analysis of composite joint without experiments. New method uses the result that the stress distribution in the characteristic length specimens is linearly proportional to the applied load. The compressive characteristic lengths calculated by the present method are exactly same as the lengths obtained by the conventional method based on experiment. The new tensile characteristic length is defined using the strength of the notched laminate, while previous methods use the strength of the sound laminate. That change allows calculating the tensile characteristic length numerically without experiment like the compressive characteristic length. Finite element analyses are conducted by MSC/NASTRAN. The interface between the fastener and laminate is modeled by the contact surface element. The finite element results based on the new characteristic lengths show the excellent agreement with experimental results for the Graphite/Epoxy composite .joints.

본 논문에서는 특성길이 결정을 위해 시편에 가해지는 하중과 내부 응력분포의 관계가 거의 선형적으로 변한다는 특성을 이용하여. 실험을 수행하지 않고 복합재 체결부 파손해석을 위한 특성길이를 결정할 수 있는 방법을 제안하였다. 제안된 방법을 사용할 경우 특성길이 결정을 위한 실험 없이도 실험값을 사용한 결과와 동일한 압축특성길이를 얻을수 있음을 보였다. 압축특성길이 결정에서와 마찬가지로 실험 없이 인장특성길이를 결정하기 위해, 기존의 방법에서와 달리, 인장특성길이의 정의를 위해 사용하는 적층판의 강도값을, 원공이 없는 적층판의 값이 아닌 원공을 가진 적층판의 값을 사용하였다. 유한요소해석은 MSC/NASTRAN을 이용하였고, 체결재와 복합재의 접촉부는 접촉면 요소를 사용하여 모델링하였다. 제안된 방법으로 해석한 복합재 체결부의 파손하중은 Graphite/Epoxy 복합재료 체겯부의 실험 견과와 매우 잘 일치함을 확인하였다

Keywords

References

  1. Journal of Composite Materials v.11 The Effect of Stacking Sequences on the Pin-Bearing in glass Fiber Reinforced Plastic W.J.Quinn https://doi.org/10.1177/002199837701100202
  2. Journal of Composites Technology and Research v.17 no.3 Effect of Stacking Sequences on Mechanically Fastened Joint Strength in Quasi-Isotropic Carbon-Epoxy Laminates H.Hamada;K.Haruma;Z.I.Maekawa https://doi.org/10.1520/CTR10490J
  3. Journal of Compositis Materials v.21 Post-failure Analysis of Bolted Composite Joints in Tension or Shear-out Mode Failure F.K.Chang;K.Y.Chang https://doi.org/10.1177/002199838702100903
  4. Journal of Compositis Materials v.25 A Progressive Failure Model for Composite Laminates Containing Openings S.C.Tan https://doi.org/10.1177/002199839102500505
  5. Journal of Compositis Materials v.30 Bearing Failure of Bolted Composite Joints : Model and Verificatiom C.H.Hung;F.K.Chang https://doi.org/10.1177/002199839603001204
  6. Journal of Compositis Materials v.10 Stress Fracture Criteria for Laminated Composites Containing Stress Concentration J.M.Whitney;R.J.Nuismer
  7. Journal of Compositis Materials v.12 Application of the Average Stress Failure Criterion : Part II-Compression R.J.Nuismer;J.D.Labor
  8. Journal of Compositis Materials v.16 Strength of Mechanically Fastened Composite Joints F.K.Chang;R.A.Scott https://doi.org/10.1177/002199838201600603
  9. Journal of Compositis Materials v.18 The Effect of Laminate Configuration on Characteristic Lengths and Rail Strength F.K.Chang;R.A.Scott;G.S.Springer https://doi.org/10.1177/002199838401800307
  10. Polymer Engineering Science v.19 Superposition of the notched strength of composite laminates R.B.Pipes;G.W.Gillepie;R.C.Wetherhold
  11. Journal of Compositis Materials v.13 Notched Strength of Composite Materials R.B.Pipes;R. C. and G. W. Gillespie https://doi.org/10.1177/002199837901300206
  12. Journal of Compositis Materials v.6 Tensile and compressive notched strength of PEEK matrix composite laminates S.C.Tan
  13. Journal of Compositis Materials v.20 The Effect of Pin Load Distribution on the Strength of Pin Loaded Holes in Laminated Composites F.K.Chang https://doi.org/10.1177/002199838602000407
  14. Composite Structures v.25 Stress and strength analysis of composite joints using direct boundary elements method C.C.Lin;C.H.Lin https://doi.org/10.1016/0263-8223(93)90167-O
  15. Journal of Compositis Materials v.30 Strength Prediction of Mechanically Fastened Quasi-isotropic Carbon/Epoxy Joints H.Hamada;Z.I.Maekawa https://doi.org/10.1177/002199839603001405
  16. Composite Structures Contact Analysis of Mechanically Fastened Joints in Composite laminates by Linear complementarity Problem Formulation H.Y.Ko;B.M.Kwak
  17. Journal of Compositis Materials v.34 A Numerical and Experimental Study of Woven composite Pin-Joints F.Pierron;F.Cerisier https://doi.org/10.1106/ADTF-88CK-6G3C-5FTM
  18. Journal of Compositis Materials v.34 The Effect Friction coefficient of a Laminate Composite, and Analysis of Pin-loaded Plates Yi Xiao;Wen-Xue Wang;Yoshihiro Takao https://doi.org/10.1106/V82B-A1BB-9PWR-MXTC
  19. 한국복합재료학회 논문집 v.15 no.2 판하중을 받는 유리/에폭시 평직 적층판의 체결부 강도 박노희;권진희(외 4인)
  20. 한국항공우주학회지 v.31 no.1 일방향.평직 복합재 혼합 적층판의 체결부 강도 연구 안현수;권진희(외4인)
  21. Journal of Composite Materials v.12 Analysis of Laminate Strength and Its Distribution S.E.Yamada;C.T.Sun https://doi.org/10.1177/002199837801200305
  22. Mechanics of Composite materials R.M.Jones