Behavior of Sandwich Composites under Edgewise and Flatwise Compression; Effect of Variation of Fibre Architecture and Core Density

Authors

  • Manujesh B. J KVG College of Engineering, Sullia, D.K. Karnataka 574327, India
  • R. Vijayalakshmi Rao Mangalore University, Karnataka, India
  • Prajna M. R. KVG College of Engineering, Sullia, D.K. Karnataka, India
  • Jnanesh N. A. KVG College of Engineering, Sullia, D.K. Karnataka, India
  • Antony P. J. KVG College of Engineering, Sullia, D.K. Karnataka, India

Keywords:

foam–core, Edgewise compression, flatwise compression, delamination, debonding

Abstract

The present paper is focused on the fabrication of foam–cored sandwich composites using manual hand layup technique and testing under in-plane compression. The sandwich construction comprises of polyurethane foams of five varied densities with E-glass fibre in vinylester resin as face sheets. Four different varieties of E-glass fibre are used. As compression properties are of critical importance during the design of lightweight structures, an attempt is made to study the behavior of sandwich composites under edgewise and flatwise compression modes. The tests are conducted in accordance with ASTM (American Society for Testing and Materials) standards. The experimental results showed that the core-facesheet interface plays a major role in contributing to compressive strength. Compressive strength increases with the increase in density of foam core. It is observed that woven roving (WR) and stitch bond mat (SBM) type fabric possess better strength in edgewise and flatwise compression than other fabrics. Edgewise compressive strength of sandwich composites is influenced by fibre architecture, where as flatwise compressive strength is independent of fibre architecture. The failure mode observed is facesheet wrinkling in low density sandwich composites and facesheet compression followed by core cracking in high density sandwich composites under edgewise compression. In flatwise compression, the failure mode is core crack followed by core crushing. 

Author Biographies

  • Manujesh B. J, KVG College of Engineering, Sullia, D.K. Karnataka 574327, India
    Department of Mechanical Engineering,
  • R. Vijayalakshmi Rao, Mangalore University, Karnataka, India
    Department of Materials Science
  • Prajna M. R., KVG College of Engineering, Sullia, D.K. Karnataka, India
    Department of Computer Science and Engineering
  • Jnanesh N. A., KVG College of Engineering, Sullia, D.K. Karnataka, India
    Department of Mechanical Engineering
  • Antony P. J., KVG College of Engineering, Sullia, D.K. Karnataka, India
    Department of Computer Science and Engineering

Downloads

Published

2019-04-15

Issue

Vol. 5 No. 1 (2015)

Section

Articles

License

Declaration and Copyright Transfer Form

(to be completed by authors)

I/ We, the undersigned author(s) of the submitted manuscript, hereby declare, that the above manuscript which is submitted for publication in the STM Journals(s), is not published already in part or whole (except in the form of abstract) in any journal or magazine for private or public circulation, and, is not under consideration of publication elsewhere.

  • I/We will not withdraw the manuscript after 1 week of submission as I have read the Author Guidelines and will adhere to the guidelines.
  • I/We Author(s ) have niether given nor will give this manuscript elsewhere for publishing after submitting in STM Journal(s).
  • I/ We have read the original version of the manuscript and am/ are responsible for the thought contents embodied in it. The work dealt in the manuscript is my/ our own, and my/ our individual contribution to this work is significant enough to qualify for authorship.
  •  I/We also agree to the authorship of the article in the following order:

Author’s name                                    

 

1. ________________

2. ________________

3. ________________

4. ________________

 

We  Author(s) tick this box and would request you to consider it as our signature as we agree to the terms of this Copyright Notice, which will apply to this submission if and when it is published by this journal.