Dynamic instability of variable angle tow composite plates with delamination

Chen, Xiaodong; Nie, Guojun; Wu, Zhangming

doi:10.1016/j.compstruct.2017.12.042

Cited by 15 publications

(3 citation statements)

References 43 publications

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“…A study [4] showed that the general anisotropic property and the variable in-plane stiffness property inherent in composites create significant challenges in the static and dynamic analysis of these new types of variable stiffness composite structures. Therefore, it is important to develop mechanical models and calculation methods for composite lamellar-shell structures of variable stiffness to understand their complex mechanical mechanisms and promote their further application in aerospace engineering.…”

Section: Introductionmentioning

confidence: 99%

Bending of Orthotropic Scalene Triangle Plates: Finite Difference Modeling

Akhmediev,

Beketova,

Nuguzhinov

et al. 2023

Preprint

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The object of study is a transversely bent triangular plate made of orthotropic material fixed along the edges of the plate under the action of a uniformly distributed load. Fourth-order differential equilibrium equations with variable orthotropy parameters were used. The equations were approximated by finite differences for a grid of scalene triangles. This type of mesh accurately describes the boundary contour of the triangular-shaped plates. The boundary conditions for the mesh consider the orthotropy of the plate material. Seven standard finite-difference equations have been developed considering the boundary conditions along the three edges of the plate and the presence of three angles of an irregularly shaped triangle. A finite difference matrix is obtained. The matrix structure makes calculating a triangular plate at different base angles possible. The boundary conditions were varied in the form of rigid or hinged support of triangular plates. The calculation method considers the orthotropic parameters of the material in two mutually perpendicular planes. The adaptation of the numerical method to the calculation of orthotropic plates of arbitrary shape is described. Relationships are given for determining the rigidity characteristics of orthotropic materials. An algorithm for simple engineering calculation of triangular orthotropic plates is proposed, which makes it possible to perform accurate calculations in variant design.

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Section: Introductionmentioning

confidence: 99%

Bending of Orthotropic Scalene Triangle Plates: Finite Difference Modeling

Akhmediev,

Beketova,

Nuguzhinov

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…The bending behavior of anisotropic composite laminates was analyzed by Wang et al [ 5 ] with the assistance of the strip element method as well as the governing equation was deduced by using classical laminated theory. The dynamic instability of the delaminated composite plates on the basis of the composite plate's buckling properties and its fundamental frequencies were analytically modeled with the aid of the classical laminated plate theory by Chen et al [ 6 ] Lopez et al [ 7 ] presented an optimization study of the hybrid laminated composite structures with the different design variables (fiber angle orientations, material properties and the number of plies) through genetic algorithm technique. The Tsai‐Wu failure criteria, pluck failure criteria (PFC) were utilized in this study to estimate the maximum stress components of the laminates.…”

Section: Introductionmentioning

confidence: 99%

Prediction of influences of size and locations of delamination on dynamic characteristics of laminated composite plate using particle swarm optimization and artificial neural network

Arumugam

Reddy

et al. 2022

Polymer Composites

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In laminated composite structures, delamination is one of the most common defects. The delamination affects the vibration characteristics of laminates, and thus these indicators can be used to detect the potentially catastrophic failures and measures the health characteristics of laminates. In this study, particle swarm optimization (PSO) and artificial neural network (ANN) are used to optimize and predict the influences of location and size of delamination on the dynamic behavior of composite plates. The classical laminated plate theory

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“…The strip element was presented in the form of a square laminated composite plate with many boundary situations and load conditions to compare with a Rayleigh-Ritz method, and received an excellent agreement. Chen [20] studied a rectangular single delamination behavior of dynamic instability using analytical modeling of CLPT by applying the potential energy-based principles. He examined the effect of composite delamination on a natural frequency, buckling, and dynamic instability by using numerical examples.…”

Section: Introductionmentioning

confidence: 99%

Different interface delamination effects on laminated composite plate structure under free vibration analysis based on classical laminated plate theory

Reddy

2020

Smart Mater. Struct.

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This paper presents a dynamic characterization of the delaminated composite plate structure. The governing Equation of the delaminated composite plate developed using finite element method (FEM) formulation grounded on a classical laminated plate theory. The FEM formulation designed for the delaminated composite plate under bending validated by comparing the natural frequencies evaluated using the present FEM formulation through MATLAB coding and experimental results. Various parametric studies have investigated. Simulation study conducted for different interfaces with different delamination location problems solved by the FEM. It shows that percentage of natural frequency decrease in the delaminated composite plate when compared to the intact composite plate. The significant variation in the natural frequency depends on the delamination location and delamination interface. This study is useful for the designers to tailor the structures with various interface delamination present in the arrangements. Artificial neural network algorithm implemented to study the effect of delamination in laminated composite plate structures

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Dynamic instability of variable angle tow composite plates with delamination

Cited by 15 publications

References 43 publications

Bending of Orthotropic Scalene Triangle Plates: Finite Difference Modeling

Bending of Orthotropic Scalene Triangle Plates: Finite Difference Modeling

Prediction of influences of size and locations of delamination on dynamic characteristics of laminated composite plate using particle swarm optimization and artificial neural network

Different interface delamination effects on laminated composite plate structure under free vibration analysis based on classical laminated plate theory

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