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.

Keywords

• simple method;
• influence of neglecting Mx;
• aspect ratio;
• finite differnce method;
• specially orthotropic plate;
• deflection;
• natural frequency

• 간단한 방법;
• Mx 무시효과;
• 형상비;
• 유한차분법;
• 특별직교이방성 평판;
• 처짐;
• 고유진동수;

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References

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