High accuracy post-buckling analysis of moderately thick composite plates using an exact finite strip

Ovesy, H.R.; Zia-Dehkordi, E.; Ghannadpour, S.A.M.

doi:10.1016/j.compstruc.2015.09.014

Cited by 8 publications

(2 citation statements)

References 21 publications

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“…Studies and employment of FSM have been extensive in recent decades. However, some research works are recently carried out to use this approach for various problems; for example, see References 58–63. More detailed information on FSM can be found in the books by Cheung 57 and Cheung and Tham 64 …”

Section: Introductionmentioning

confidence: 99%

Finite strip method based on Carrera unified formulation for the free vibration analysis of variable stiffness composite laminates

Shojaee

Hamzehei‐Javaran

2022

Numerical Meth Engineering

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This work presents a refinement of the finite strip method (FSM) based on the Carrera unified formulation (CUF) and is applied to free vibration analysis of variable stiffness composite laminated (VSCL) plates. VSCL plates considered here are composed of layers with curvilinear fibers in which their orientation angle changes linearly with respect to one of the in‐plane coordinates. The FSM permits the plate to be divided into some finite strips connected along the so‐called nodal lines. The conventional finite strip method involves an approximation of the solution of a plate problem by using continuously harmonic series in the longitudinal direction along the nodal lines and simple polynomial shape functions (the usual beam shape functions) in the transverse direction of the plate. However, refined finite strip model that presented in this paper allows one to express the unknown variables as a set of thickness functions that only depend on the thickness coordinate and the corresponding variable that depends on the in‐plane coordinates which involve continuously harmonic series and polynomial shape functions. Thanks to this new finite strip model, the shape functions used in the transverse direction can be chosen as 1D bar shape functions, and also, all three components of the displacement field are considered in each nodal line. Moreover, based on this approach, three‐dimensional displacement field is approximated in a compact form as a generic N‐order expansion. Therefore, explicit expressions of fundamental nuclei of finite strip matrices are obtained in a compact form and presented here. The results obtained by the present formulation for VSCL plates are compared with those obtained from published data. The results show that this kind of strip is efficient and useful. Further, several numerical examples are presented, and the effect of the order of expansion, the number of strips, curvilinear fiber angle, and various boundary conditions are examined.

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Section: Introductionmentioning

confidence: 99%

Finite strip method based on Carrera unified formulation for the free vibration analysis of variable stiffness composite laminates

Shojaee

Hamzehei‐Javaran

2022

Numerical Meth Engineering

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“…An exact finite strip is introduced by Ghannadpour and Ovesy (2008) to investigate the exact relative post-buckling stiffness of I-section struts. To extend their works, they developed a high accuracy finite strip for the buckling and post-buckling analyses of moderately thick symmetric cross-ply composite plates based on FSDT (Ovesy et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Energy based collocation method to predict progressive damage behavior of imperfect composite plates under compression

Ghannadpour

Shakeri

2018

Lat. Am. j. solids struct.

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A new collocation methodology is presented to predict failure and progressive damage behavior of composite plates in this paper. The present work deals with composite plates containing initial geometric imperfections and different boundary conditions under uniaxial in-plane compressive load. In the present study, the domain is discretized with Legendre-Gauss-Lobatto nodes and the approximation of displacement fields is performed by Legendre Basis Functions (LBFs). The onset of damage and damage evolution are predicted by Hashin's failure criteria and by proposed material degradation models. Three geometric degradation models are also assumed to estimate the degradation zone around the failure location which are named complete, region and node degradation models.

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Closed-form approximate solution for linear buckling of Mindlin plates with SRSR-boundary conditions

Beerhorst

Babu

2020

Composite Structures

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High accuracy post-buckling analysis of moderately thick composite plates using an exact finite strip

Cited by 8 publications

References 21 publications

Finite strip method based on Carrera unified formulation for the free vibration analysis of variable stiffness composite laminates

Finite strip method based on Carrera unified formulation for the free vibration analysis of variable stiffness composite laminates

Energy based collocation method to predict progressive damage behavior of imperfect composite plates under compression

Closed-form approximate solution for linear buckling of Mindlin plates with SRSR-boundary conditions

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