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題名 | Viscoelastic Buckling of Cross Ply Laminated Cylindrical Circular Shells Based on a High Order Displacement Field=使用高階位移場分析正交積層圓柱殼的黏彈性挫曲 |
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作者 | 張正憲; 鄭江河; | 書刊名 | 力學 |
卷期 | 7:2 1991.06[民80.06] |
頁次 | 頁99-107 |
分類號 | 440.2 |
關鍵詞 | 正交積層; 移場分析; 圓柱殼; 黏彈性; |
語文 | 英文(English) |
中文摘要 | 本文旨在探討複合材料正交積層圓柱殼的黏彈性挫曲。經假設挫曲載荷為時間的 常數後,可將積分形式的應力應變關係,轉為時間的代數函數,使得問題成為準彈性問題, 然後利用一容許厚度方向剪切及正向應變的高階位移場,經由總位能的二階變分求得挫曲方 程式。再由雙向富利葉級數求得不同時間下的挫曲載荷。本文並和古典及一階位移場的理論 比較。數值結果和討論俱見本文。 |
英文摘要 | Viscoelastic buckling analysis of a cross ply laminated cylindrical circular shells with both ends simply supported is presented using Navier double series method. The laminated shell is assumed to be viscoelastic. The effect of the loading is assumed to be time-wise constant and so the viscoelastic moduli can be approximated by the time dependent Tsai-Halpin equations and the problem becomes quasielastic. The work takes into account the transverse shear and normal deformations and the effect of bending-extension coupling by using a higher order displacement field and the non-linear strain-displacement relationship. Effects of important parameters, such as ply angle, ratio of thickness to edge length, number of layers, ratio of in-plane to transverse modulus, etc., are studied. Comparisons among classical shell theory, first order transverse shear deformation theory, and the present transverse shear and transverse normal deformation theory are made. |
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