Indentation failure of circular composite sandwich plates

A. Rajaneesh; I. Sridhar; A. R. Akisanya

doi:10.1016/j.matdes.2015.09.070

Indentation failure of circular composite sandwich plates

A. Rajaneesh, I. Sridhar, A. R. Akisanya

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Abstract

Ski boards, helmets are sandwich structures and prone to core indentation failure under localized loads. In this work, axisymmetric response of a circular composite sandwich plate subjected to indentation by a rigid flat/hemi-spherical punch is examined. Flat punch is assumed to impose an axisymmetric line load, whereas spherical indentor imposes point load. Small deformation response is investigated by solving the equilibrium equations exactly, while large deformation response is estimated using Berger's method. The indentation behaviour is predicted numerically by modelling core as (i) a continuum foam and (ii) a plate on foundation with reaction force (i.e. interaction problem) by employing user interaction subroutine in commercial finite element package Abaqus®. Derived analytical estimates for the indentation loads and the corresponding finite element predictions are found to be in good agreement with the experimental measurements.

Original language	English
Pages (from-to)	439-447
Number of pages	9
Journal	Materials & Design
Volume	89
Early online date	25 Sep 2015
DOIs	https://doi.org/10.1016/j.matdes.2015.09.070
Publication status	Published - 5 Jan 2016

Keywords

Composite Sandwich Plates
Non-linear behavior
Indentation
Flat/Spherical punch

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Accepted Author Manuscript
© 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Accepted author manuscript, 5.38 MBLicence: CC BY-NC-ND

Alfred Akisanya
- Engineering, Engineering - Personal Chair
- Centre for Micro- and Nanomechanics (CEMINACS)
Person: Academic

Cite this

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title = "Indentation failure of circular composite sandwich plates",

abstract = "Ski boards, helmets are sandwich structures and prone to core indentation failure under localized loads. In this work, axisymmetric response of a circular composite sandwich plate subjected to indentation by a rigid flat/hemi-spherical punch is examined. Flat punch is assumed to impose an axisymmetric line load, whereas spherical indentor imposes point load. Small deformation response is investigated by solving the equilibrium equations exactly, while large deformation response is estimated using Berger's method. The indentation behaviour is predicted numerically by modelling core as (i) a continuum foam and (ii) a plate on foundation with reaction force (i.e. interaction problem) by employing user interaction subroutine in commercial finite element package Abaqus{\textregistered}. Derived analytical estimates for the indentation loads and the corresponding finite element predictions are found to be in good agreement with the experimental measurements.",

keywords = "Composite Sandwich Plates, Non-linear behavior, Indentation, Flat/Spherical punch",

author = "A. Rajaneesh and I. Sridhar and Akisanya, {A. R.}",

note = "Acknowledgements A. Rajaneesh and A. R. Akisanya acknowledge the financial support from Nanyang Technological University, Singapore through award of Graduate Scholarship and Tan Chin Tuan (TCT) Visiting Fellowship, respectively. I. Sridhar thanks British High Commission, Singapore for facilitating a Collaborative Development Award (CDA) to visit UK Universities for research collaboration.",

year = "2016",

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doi = "10.1016/j.matdes.2015.09.070",

language = "English",

volume = "89",

pages = "439--447",

journal = "Materials & Design",

issn = "0261-3069",

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AU - Rajaneesh, A.

AU - Sridhar, I.

AU - Akisanya, A. R.

N1 - Acknowledgements A. Rajaneesh and A. R. Akisanya acknowledge the financial support from Nanyang Technological University, Singapore through award of Graduate Scholarship and Tan Chin Tuan (TCT) Visiting Fellowship, respectively. I. Sridhar thanks British High Commission, Singapore for facilitating a Collaborative Development Award (CDA) to visit UK Universities for research collaboration.

PY - 2016/1/5

Y1 - 2016/1/5

N2 - Ski boards, helmets are sandwich structures and prone to core indentation failure under localized loads. In this work, axisymmetric response of a circular composite sandwich plate subjected to indentation by a rigid flat/hemi-spherical punch is examined. Flat punch is assumed to impose an axisymmetric line load, whereas spherical indentor imposes point load. Small deformation response is investigated by solving the equilibrium equations exactly, while large deformation response is estimated using Berger's method. The indentation behaviour is predicted numerically by modelling core as (i) a continuum foam and (ii) a plate on foundation with reaction force (i.e. interaction problem) by employing user interaction subroutine in commercial finite element package Abaqus®. Derived analytical estimates for the indentation loads and the corresponding finite element predictions are found to be in good agreement with the experimental measurements.

AB - Ski boards, helmets are sandwich structures and prone to core indentation failure under localized loads. In this work, axisymmetric response of a circular composite sandwich plate subjected to indentation by a rigid flat/hemi-spherical punch is examined. Flat punch is assumed to impose an axisymmetric line load, whereas spherical indentor imposes point load. Small deformation response is investigated by solving the equilibrium equations exactly, while large deformation response is estimated using Berger's method. The indentation behaviour is predicted numerically by modelling core as (i) a continuum foam and (ii) a plate on foundation with reaction force (i.e. interaction problem) by employing user interaction subroutine in commercial finite element package Abaqus®. Derived analytical estimates for the indentation loads and the corresponding finite element predictions are found to be in good agreement with the experimental measurements.

KW - Composite Sandwich Plates

KW - Non-linear behavior

KW - Indentation

KW - Flat/Spherical punch

U2 - 10.1016/j.matdes.2015.09.070

DO - 10.1016/j.matdes.2015.09.070

M3 - Article

VL - 89

SP - 439

EP - 447

JO - Materials & Design

JF - Materials & Design

SN - 0261-3069

ER -

Indentation failure of circular composite sandwich plates

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Alfred Akisanya

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