Fem Analysis of Progressive Failure for Composite Hypar Shells

Ghosh, Arghya; Chakravorty, D.

doi:10.1007/s11223-020-00202-w

Cited by 4 publications

(5 citation statements)

References 27 publications

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“…Here, Nx, Ny and Nxy represent the components of normal stress resultant vector and the expressions of which are the same as it were reported earlier by Ghosh and Chakravorty [2]. From the same reference the laminate elasticity matrix [E] is taken including the properties of graphite-epoxy composite.…”

Section: Finite Element Mathematical Formulationmentioning

confidence: 99%

“…Progressive damage of composite plates due to bending was studied by Ferreira et al [1] .They used a FORTRAN based code and studied the variation of different stress parameters considering sinusoidal surface pressure. Ghosh and Chakravorty [2] reported failure initiation of laminated hypar shell roofs of antisymmetric cross and angle ply laminations considering different boundary conditions. They used nonlinear strains and the recently proposed Puck's criterion of failure together with serviceability failure in terms of permissible deflection limits.…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear First Ply Failure Response of Composite Cylindrical Shells under Non-Uniform Transverse Pressure

Choudhury,

Ghosh,

Chakravorty

2024

World Congress on Civil, Structural, and Environmental Engineering

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Use of laminated composite materials in place of conventional materials in weight sensitive disciplines of engineering including structural engineering started from the second half of the twentieth century. Confident use of composite structural units necessitates comprehensive understanding of the material behaviour including failure characteristics which the researchers are focusing on in the recent papers. Failure in composite materials may initiate from the surface and from inner laminae as well which may remain undetected. Unnoticed flaw may progress leading to overall failure of the structural unit. This paper intends to explore the first ply failure characteristics of shells and takes up the industrially popular cylindrical configuration having wide industrial applications about which only a very few papers report the failure related information. Failure of clamped graphite-epoxy shells is studied using Sanders' linear strains together with von-Kármán nonlinear strain components. The shells subjected to nonuniform sinusoidal is modelled using isoparametric Serendipity element having five degrees of freedom at each node. The paper reports the gross failure behaviour of a number of shell options with varying lamination and curvature. The results are presented systematically for lucid understanding and are interpreted from practical engineering standpoints. The paper concludes with pin pointed guidelines based on which the different shell combinations may be taken up for relative performance study.

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Section: Finite Element Mathematical Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nonlinear First Ply Failure Response of Composite Cylindrical Shells under Non-Uniform Transverse Pressure

Choudhury,

Ghosh,

Chakravorty

2024

World Congress on Civil, Structural, and Environmental Engineering

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“…Considering the high cost of full-scale tests, it is necessary to focus on analytical methods and computer modeling when investigating the strength of wagons and individual components of rolling stock [11,[19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…Using 3D modeling systems (KOMPAS-3D, ANSYS, APM Winmachine, Solidworks, etc.) after building a 3D-model one can obtain not only the stress-strain state, inertial and mass characteristics but also the stiffness value at different types of loading of both individual car elements and the whole car [5][6][7]21]. In works [18,22], the coupler body was calculated for the strength under the action on it of both tensile and compressive quasi-static and impact loads.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Coupling Strength at Non-Central Interaction of Railcars

Швець

2022

Strength Mater

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The strength of the coupling device under the action of operating loads with regard to the non-central interaction of two cars is defined. When longitudinal force is transmitted through the coupler, the points of its possible rotation can be either the upper ribs of the shank end surface or the upper ribs of the damping device body support surface. The tail part of the coupler is under conditions of eccentric compression (or tension) by the force, which is non-parallel to the longitudinal axis. Through any cross-section of the shank, transverse and longitudinal forces are transmitted, applied at a point far from the center of gravity of the section. Using the principle of addition of forces action, a dependence for the definition of the maximum normal stresses in the extreme fibers of the analyzed section of the shank of the coupler, the most distant from the main axis of inertia, has been obtained. The damage to the area of the coupler shank jumper and the bending of the shank in the horizontal and vertical planes, which occur during operation, are justified. Calculation methods make it possible to study the influence of eccentricities of longitudinal force application relative to the coupler axis and the difference of coupler axis levels in the analyzed sections on the magnitude of the compressive operating loads. Application of the obtained results will not only help to ensure the strength of the coupling devices, but will also ensure the freight cars' durability under conditions of increasing train weight and increasing train speed.

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“…That model was able to calculate the shear stress over the thickness direction with great accuracy. Bakshi and Chakravorty [82] reported the crack initiation in composite conoidal shells under central concentrated load, while Ghosh et al [90] studied crack progression in laminated hypar shells using the FEM in linear and elastic ranges under uniform pressure.…”

Section: Introductionmentioning

confidence: 99%

A Review on Relative Linear and Nonlinear Strains Performances of Laminated Composite Shell Roofs

Bakshi

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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This paper comprehensively reviews research articles on linear and nonlinear performances of laminated shells. The study on composite surfaces gained popularity since the last decade. The composite shell problems for complex forms are difficult to solve analytically. Hence, the numerical solutions became popular. The invent of fast computers popularized the numerical approaches further among practicing engineers. Thin shell surfaces are widely popular to cover long unsupported spans in civil engineering; however, these are vulnerable to instability especially under transverse overloading. The stiffened surfaces addressed such problems. The detailed review on bare and stiffened surfaces highlights gaps in literature which can help the researchers to find out scopes of future research problems.

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Fem Analysis of Progressive Failure for Composite Hypar Shells

Cited by 4 publications

References 27 publications

Nonlinear First Ply Failure Response of Composite Cylindrical Shells under Non-Uniform Transverse Pressure

Nonlinear First Ply Failure Response of Composite Cylindrical Shells under Non-Uniform Transverse Pressure

Investigation of Coupling Strength at Non-Central Interaction of Railcars

A Review on Relative Linear and Nonlinear Strains Performances of Laminated Composite Shell Roofs

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