A composite beam model including variable warping effects derived from a generalized Saint Venant solution

2014 ◽  
Vol 110 ◽  
pp. 140-151 ◽  
Author(s):  
Andrea Genoese ◽  
Alessandra Genoese ◽  
Antonio Bilotta ◽  
Giovanni Garcea
Keyword(s):  
Composite Beam ◽  
Beam Model

Static and Dynamic Validations of a Refined Thin-Walled Composite Beam Model

AIAA Journal ◽  
2001 ◽  
Vol 39 (12) ◽  
pp. 2422-2424 ◽  
Author(s):  
Zhanming Qin ◽  
Liviu Librescu
Keyword(s):  
Composite Beam ◽  
Beam Model ◽  
Thin Walled

Cochlear partition stiffness—a composite beam model

1974 ◽  
Vol 55 (6) ◽  
pp. 1252-1258 ◽  
Author(s):  
P. Allaire ◽  
S. Raynor ◽  
M. Billone
Keyword(s):  
Composite Beam ◽  
Beam Model ◽  
Cochlear Partition

Parameter Identification for Piezoelectric Material in a Piezoelectric Laminated Composite Beam Model

2012 ◽  
Vol 174-177 ◽  
pp. 448-454
Author(s):  
Shuang Bei Li ◽  
Lin Jie Jiang ◽  
Du Yi Mo ◽  
Li Xin Huang
Keyword(s):  
Parameter Identification ◽  
Analytical Solutions ◽  
Composite Beam ◽  
Laminated Composite ◽  
Identification Problem ◽  
Finite Difference Approximation ◽  
Difference Approximation ◽  
Beam Model ◽  
Parameter Identification Problem ◽  
Laminated Composite Beam

A fit-to-data technique was proposed to identify the mechanical and piezoelectric parameters of a model involving a piezoelectric laminated composite beam. Analytical solutions for displacement of the model were derived for parameter identification. The parameter identification problem was formulated as the problem of minimizing the objective function defined as a square sum of differences between the measured displacement and the computed displacement by the analytical solutions. Levenberg-Marquardt method was used to solve the minimization problem. The sensitivities of displacements with respect to the parameters were based on the finite difference approximation method. Numerical example shows that the proposed technique for parameter identification is effective.

Mechanics of Bimaterial Interface: Shear Deformable Split Bilayer Beam Theory and Fracture

2005 ◽  
Vol 72 (5) ◽  
pp. 674-682 ◽  
Author(s):  
Jialai Wang ◽  
Pizhong Qiao
Keyword(s):  
Finite Element Analysis ◽  
Composite Beam ◽  
Present Model ◽  
Local Buckling ◽  
Crack Tip ◽  
Beam Theory ◽  
Local Deformation ◽  
Beam Model ◽  
Element Analysis ◽  
Shear Deformable

A novel split beam model is introduced to account for the local effects at the crack tip of bi-material interface by modeling a bi-layer composite beam as two separate shear deformable beams bonded perfectly along their interface. In comparisons with analytical two-dimensional continuum solutions and finite element analysis, better agreements are achieved for the present model, which is capable of capturing the local deformation at the crack tip in contrast to the conventional composite beam theory. New solutions of two important issues of cracked beams, i.e., local buckling and interface fracture, are then presented based on the proposed split bi-layer shear deformable beam model. Local buckling load of a delaminated beam considering the root rotation at the delamination tip is first obtained. By considering the root rotation at the crack tip, the buckling load is lower than the existing solution neglecting the local deformation at the delamination tip. New expressions of energy release rate and stress intensity factor considering the transverse shear effect are obtained by the solution of local deformation based on the novel split beam model, of which several new terms associated with the transverse shear force are present, and they represent an improved solution compared to the one from the classical beam model. Two specimens are analyzed with the present model, and the corresponding refined fracture parameters are provided, which are in better agreement with finite element analysis compared to the available classical solutions.

Static and dynamic validations of a refined thin-walled composite beam model

AIAA Journal ◽  
2001 ◽  
Vol 39 ◽  
pp. 2422-2424
Author(s):  
Z. Qin ◽  
L. Librescu
Keyword(s):  
Composite Beam ◽  
Beam Model ◽  
Thin Walled
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