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 |
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Pages (from-to) | 439-447 |
Number of pages | 9 |
Journal | Materials & Design |
Volume | 89 |
Early online date | 25 Sept 2015 |
DOIs | |
Publication status | Published - 5 Jan 2016 |
Bibliographical note
AcknowledgementsA. 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.
Keywords
- Composite Sandwich Plates
- Non-linear behavior
- Indentation
- Flat/Spherical punch
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Alfred Akisanya
- Engineering, National Decommissioning Centre
- Engineering, Engineering - Personal Chair
- Engineering, Centre for Micro- and Nanomechanics (CEMINACS)
Person: Academic