Nonstationary random response of laminated composite structures by a hybrid strain-based laminated flat triangular shell finite element

1996 ◽  
Vol 23 (1) ◽  
pp. 23-35 ◽  
Author(s):  
C.W.S. To ◽  
B. Wang
Keyword(s):  
Finite Element ◽  
Composite Structures ◽  
Laminated Composite ◽  
Random Response ◽  
Hybrid Strain ◽  
Laminated Composite Structures ◽  
Shell Finite Element

Nonstationary Random Response of Laminated Composite Structures by a Hybrid Strain-Based Laminated Flat Triangular Shell Finite Element

1995 ◽  
Author(s):  
C. W. S. To ◽  
B. Wang
Keyword(s):  
Finite Element ◽  
Composite Structures ◽  
Composite Shell ◽  
Laminated Composite ◽  
Random Excitation ◽  
Cylindrical Panel ◽  
Shell Structures ◽  
Hybrid Strain ◽  
Automobile Engineering ◽  
Shell Finite Element

Abstract The prediction and analysis of response of laminated composite shell structures under nonstationary random excitation is of considerable interest to design engineers in aerospace and automobile engineering fields. However, it seems that there is no known comprehensive published work on such an analysis that employs the versatile finite element method. Thus, the main focus of the investigation reported in this paper is the application of the hybrid strain-based laminated composite flat triangular shell finite element, that has been developed by the authors, for the analysis of laminated composite shell structures under a relatively wide class of nonstationary random excitations. Representative results of a simply-supported laminated composite cylindrical panel subjected to a point nonstationary random excitation are included.

Transient Response Analysis of Geometrically Nonlinear Laminated Composite Shell Structures

1996 ◽  
Author(s):  
Cho W. S. To ◽  
Bin Wang
Keyword(s):  
Finite Element ◽  
Degrees Of Freedom ◽  
Composite Shell ◽  
Laminated Composite ◽  
Shell Structures ◽  
Response Analysis ◽  
Hybrid Strain ◽  
Drilling Degree Of Freedom ◽  
Shell Finite Element ◽  
Shear Deformable

Abstract The investigation reported in this paper is concerned with the prediction of geometrically large nonlinear responses of laminated composite shell structures under transient excitations by employing the hybrid strain based flat triangular laminated composite shell finite element presented here. Large deformation of finite strain and finite rotation are considered. The finite element has eighteen degrees-of-freedom which encompass the important drilling degree-of-freedom at every node. It is hinged on the first order shear deformable lamination theory. Various laminated composite shell structures have been studied and for brevity only two are presented here. It is concluded that the element proposed is very accurate and efficient. Shear locking has not appeared in the results obtained thus far. There is no zero energy mode detected in the problems studied. For nonlinear dynamic response computations, the full structural system has to be considered if accurate results are required.

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