A refined higher order finite element for asymmetric composite beams

被引：82

作者：

Murthy, MVVS

Mahapatra, DR

Badarinarayana, K

Gopalakrishnan, S ^{[1
]}

机构：

[1] Indian Inst Sci, Dept Aerosp Engn, Bangalore 560012, Karnataka, India

[2] Indian Space Res Org, ISAC, ISRO Satellite Ctr, Bangalore 560017, Karnataka, India

来源：

COMPOSITE STRUCTURES | 2005年 / 67卷 / 01期

关键词：

laminated composite; higher order shear deformation; asymmetric ply-stacking; exact stiffness matrix; axial-flexural-shear coupling;

D O I：

10.1016/j.compstruct.2004.01.005

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

A refined 2-node, 4 DOF/node beam element is derived based on higher order shear deformation theory for axial-flexural-shear coupled deformation in asymmetrically stacked laminated composite beams. The element has an exact shape function matrix, which is derived by satisfying the static part of the governing equations of motion, where a general ply-stacking is considered. This makes the element super-convergent in static analysis. The numerical results are validated by considering uniformly distributed load with various boundary conditions. Subsequently, the efficiency of the element for free vibration analysis is studied. Numerical examples showing the nature of interlaminar stresses for various ply-stacking configurations and boundary conditions are demonstrated. Also, parametric studies are performed to study the effect of coupling and stiffness on the natural frequencies. Based on these studies, number of observations are drawn. (C) 2004 Published by Elsevier Ltd.

引用

页码：27 / 35

页数：9

共 22 条

[1]

Ambartsumyan SA., 1974, General Theory of Anisotropic Shells

[2]

Bickford W.B., 1982, DEV THEOR APPL MECH, V11, P137

[3] Finite element analysis of free vibration and wave propagation in asymmetric composite beams with structural discontinuities [J].