Free Vibration of Laminated Composite Beams and Plates Using ADINA Finite Element Code

1995 ◽  
Author(s):  
James Stolte
Keyword(s):  
Finite Element ◽  
Natural Frequency ◽  
Laminated Composite ◽  
Shell Element ◽  
Composite Beams ◽  
Advanced Technology ◽  
Finite Element Code ◽  
First Order ◽  
Natural Frequency Analysis ◽  
Laminated Composite Beams

Abstract Composite materials are being investigated in advanced technology test beds for use in future armored vehicles. We are particularly interested in the response to impulsive loading for which the knowledge of natural frequency behavior is important. In this paper, we investigate the natural frequency analysis capabilities of the multilayered shell element of the ADINA finite element code as applied to laminated composite beams and plates. Results are compared to those published in the literature or those derived from exact solutions. The ADINA shell element employs a first-order shear deformation theory, and the results are found to agree well with other first-order theories. Although ADINA does not allow for a direct method of incorporating a shear correction factor commonly used in first-order theories, it is demonstrated how this can be included by modifying the material properties.

Buckling Analysis of Laminated Composite Beams by Using an Improved First Order Formulation

2021 ◽  
Vol 1033 ◽  
pp. 156-160
Author(s):  
Shammely Ayala ◽  
Augusto Vallejos ◽  
Roman Arciniega
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Virtual Work ◽  
Three Dimensional ◽  
Laminated Composite ◽  
Element Model ◽  
Composite Beams ◽  
Lagrange Polynomials ◽  
First Order ◽  
Laminated Composite Beams

In this work, a finite element model based on an improved first-order formulation (IFSDT) is developed to analyze buckling phenomenon in laminated composite beams. The formulation has five independent variables and takes into account thickness stretching. Three-dimensional constitutive equations are employed to define the material properties. The Trefftz criterion is used for the stability analysis. The finite element model is derived from the principle of virtual work with high-order Lagrange polynomials to interpolate the field variables and to prevent shear locking. Numerical results are compared and validated with those available in literature. Furthermore, a parametric study is presented.

A Novel Shell Element for Quasi-Static and Natural Frequency Analysis of Textile Composite Structures

2014 ◽  
Vol 81 (8) ◽  
Author(s):  
Wu Xu ◽  
Anthony M. Waas
Keyword(s):  
Finite Element ◽  
Natural Frequency ◽  
Composite Structures ◽  
Repeat Unit ◽  
Three Dimensional ◽  
Shell Element ◽  
Textile Composite ◽  
Shell Finite Element ◽  
Three Dimensional Finite Element ◽  
Natural Frequency Analysis

A shell element for analysis of textile composite structures is proposed in this paper. Based on the embedded element method and solid shell concept, the architecture, geometry, and material properties of a repeat unit cell (RUC) of textile composite are embedded in a single shell finite element. Flat and curved textile composite structures are used to apply and verify the present shell element. The deformation and natural frequency obtained by the present shell element are compared against those computed from full three-dimensional finite element analyses. It is shown that the proposed shell element is efficient, simple, and reliable for textile composite structural analysis.

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