The Effect of Neglecting the Longitudinal Moment Terms in Analyzing Laminates with Increasing Aspect Ratio

적층판 해석시 형상비 증가에 따른 종방향 모멘트의 무시효과

  • 한봉구 (서울산업대학교 구조공학과) ;
  • 김덕현 (서울산업대학교 구조공학과)
  • Received : 2000.11.14
  • Published : 2001.02.27

Abstract

Theories for advanced composite structures are too difficult for such design engineers for construction and some simple but accurate enough methods are necessary. The senior author has reported that some laminate orientations have decreasing values of $D_{16}$, $B_{16}$, $D_{26}$ and $B_{26}$ stiffnesses as the ply number increases. For such plates the fiber orientations given above behave as specially orthotropic plates and simple formulas developed by the senior author. Most of the bidge and building slabs on girders have large aspect ratios For such cases frurther simplification is possible by neglecting the effect of the longitudinal moment terms(Mx) on the relevant partial differential equationsof equilibrium In this paper, the result of the study on the subject problem is presented.

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