Postprocess method using displacement field of higher order laminated composite plate theory

AIAA Journal ◽  
1996 ◽  
Vol 34 (2) ◽  
pp. 362-368 ◽  
Author(s):  
Maenghyo Cho ◽  
Ji-Heon Kim
Keyword(s):  
Displacement Field ◽  
Composite Plate ◽  
Plate Theory ◽  
Laminated Composite ◽  
Higher Order ◽  
Laminated Composite Plate

Flexural strength of delaminated composite plate – An experimental validation

2016 ◽  
Vol 27 (2) ◽  
pp. 296-329 ◽  
Author(s):  
Chetan K Hirwani ◽  
Subrata K Panda ◽  
Siba S Mahapatra ◽  
Sanjib K Mandal ◽  
Lokesh Srivastava ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Composite Plate ◽  
Numerical Models ◽  
Laminated Composite ◽  
Computer Code ◽  
Higher Order ◽  
Geometrical Parameters ◽  
Laminated Composite Plate ◽  
Three Point Bend Test ◽  
Point Bend

In the present work, the flexural strength of delaminated composite plate has been analysed numerically and compared with experimental results. For the numerical investigation, a general mathematical model of the laminated composite plate with and without delamination has been developed using two higher-order kinematic models. The desired governing equation is obtained using variational approach and discretised with the help of the isoparametric finite element steps. The flexural responses of the delaminated structure computed numerically through a generic in-house computer code developed in MATLAB environment. The consistency of the developed numerical models is checked and validated by comparing the bending responses with the available published results. Now, the experimental bending responses of both intact and delaminated composites are evaluated using three-point bend test and compared with numerical responses of the presently developed higher-order models. Finally, the effect of different materials and geometrical parameters including the size, location and position of the delamination on the bending behaviour of the laminated composite plate have been analysed numerically and discussed in detail.

Laminated Composite Plate Theory With Improved In-Plane Responses

1986 ◽  
Vol 53 (3) ◽  
pp. 661-666 ◽  
Author(s):  
H. Murakami
Keyword(s):  
Variational Principle ◽  
Composite Plate ◽  
Plate Theory ◽  
Laminated Composite ◽  
Laminated Plates ◽  
Thickness Variation ◽  
Laminated Plate ◽  
Laminated Composite Plate ◽  
Cylindrical Bending ◽  
Shear Deformable

In order to improve the accuracy of the in-plane response of the shear, deformable laminated composite plate theory, a new laminated plate theory has been developed based upon a new variational principle proposed by Reissner (1984). The improvement is achieved by including a zigzag-shaped C0 function to approximate the thickness variation of in-plane displacements. The accuracy of this theory is examined by applying it to a problem of cylindrical bending of laminated plates which has been solved exactly by Pagano (1969). The comparison of the in-plane response with the exact solutions for symmetric three-ply and five-ply layers has demonstrated that the new theory predicts the in-plane response very accurately even for small span-to-depth ratios.

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