94006-1994

Elastic buckling of unbalanced laminated fibre reinforced composite plates. (Rectangular plates of AsBtDs type@ all edges simply-supported under biaxial loading.)


 

 

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标准号
94006-1994
发布日期
1994年04月01日
实施日期
2004年05月14日
废止日期
中国标准分类号
/
国际标准分类号
/
发布单位
ESDU - Engineering Sciences Data Unit
引用标准
34
适用范围
ESDU 94006 introduces a Fortran program@ ESDUpac A9406@ for calculating the buckling loading of composite plates for which in both the direct and flexural stiffness matrices the first two terms in the last column and last row are zero and in the coupling stiffness matrix the first two terms of the first two rows and the last term of the third row are zero. Such stiffness matrices arise when the fibres are all laid to make the same angle with a plate edge@ but the angles are of opposite signs in each pair of laminae equidistant from the centre plane. The plate is assumed to be initially flat and rectangular@ with loading applied uniformly along the edges. No account is taken of through-the-thickness shear deformation. Uniaxial or biaxial loading (in which one load can be tensile) is treated; under biaxial loading either one load may be fixed@ and the other at buckling determined@ or the ratio of the loads may be fixed@ and the loads in that ratio at buckling found. Example curves illustrate the variation of the buckling load with plate aspect ratio showing the influence of the coupling stiffness matrix. The full input and output to the program is explained and illustrated with worked examples. The program is provided on disc in the software volume both uncompiled and compiled within ESDUview@ a user-friendly shell running under MS DOS that prompts on screen for input data.




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