Crushworthiness of polymeric foam used as core composite sandwich structure

Crushworthiness of polymeric foam used as core composite sandwich structure

PUR foam has been used extensively as core of sandwich structures in the aerospace and automobile industries. The understanding of their behaviour under crush conditions is extremely important for the design and manufacturing of these engineering structures since crush problems are directly related...

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Main Author: Zakaria, Hafizawati
Format: Thesis
Language:English
Published: 2006
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://eprints.utm.my/id/eprint/9657/1/HafizawatiZakariaMFKM2006.pdf
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spelling my-utm-ep.96572018-09-17T03:35:43Z Crushworthiness of polymeric foam used as core composite sandwich structure 2006-05 Zakaria, Hafizawati TJ Mechanical engineering and machinery PUR foam has been used extensively as core of sandwich structures in the aerospace and automobile industries. The understanding of their behaviour under crush conditions is extremely important for the design and manufacturing of these engineering structures since crush problems are directly related to structural integrity and safety requirements. In this paper, selected foam cored polymer sandwich beam were subjected to static three point bend tests. The beams were loaded beyond first failure to study the nonlinear post failure behaviour. Provided the beam fails in shear of core and skin delamination. The post failure response is dominated by the crushing of the core and upper skin compression. A theoretical model by Mines and Jones is used to simulate the post failure response of the beams. The model assumes an idealized plastic hinge in the central loading point and relates the beam constituent material properties to the beam overall response. The beams were also subjected with impact test. The impact response of foam based sandwich structures has been investigated using a build-up falling weight impact method and load cell system. 2006-05 Thesis http://eprints.utm.my/id/eprint/9657/ http://eprints.utm.my/id/eprint/9657/1/HafizawatiZakariaMFKM2006.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:54856 masters Universiti Teknologi Malaysia, Faculty of Mechanical Engineering Faculty of Mechanical Engineering 1. Mines, R.A.W. and Jones, N., ‘An Approximate Elastic-Plastic Analysis of the Static and Impact Behaviour of Polymer Composite Sandwich Beams’. Composites Vol. 26 No. 2, December 1995. 2. Mines, R.A.W., Worrall, C.M. and Gibson, A.G., ‘The Static and Impact Behaviour of Polymer Composite Sandwich Beams’. Composites Vol. 25 No. 2, 1994. 3. Abdul Ghani, A.R., ‘Impact Performance of GRP Sandwich Beams’. B. Eng. Final Year Report, University of Liverpool, 1994. 4. Lecturer Notes from Impact Performance of Composite Structures, by Dr. R.A.W. Mines, Department of Mechanical Engineering, University of Liverpool, Oct. 93-March 94. 5. Allen, H.G., ‘Analysis and Design of Structural Sandwich Panels’. Pergamon Press, Oxford, 1969. 6. Triantafillou, T.C., Zhang, J., Shercliff, T.L., Gibson, L.J., and Ashby, M.F., ‘Failure Surfaces for Cellular Material under Multi-axial Load-II Comparison of Models with Experiments’. International Journal of Mechanical Sciences Vol.31 No.9 1989. 7. Bruins P.F., “Polyurethene Technology�. New York: Interscience Publisher, 1969 8. Teng J.G. et al, “FRP Strengthened RC Structures�. John-Wiley & sons, Inc, USA, 2002. 9. Charles V.C., “Handbook of Adhesive Bonding�. McGraw-Hill Inc, 1973, pg: xvii. 10. Braun, T., Navratil, J. D., and Farag, A. B. (1985). “Polyurethane Foam Sorbents in Separation Science�. United States: CRC Press Inc. 11. P.S.M. Yusoff (1996). “A Study of Structure-Property Relations in Rigid Polyurethane Foams�. Phd Thesis. Manchester: UMIST 12. Dham, M. and Uhlig, K. (1985). “Additives and Auxiliary Materials.� Polyurethane Handbook. New York: Hanser Publishers. 90-108 13. Grigat, E. (1985). “Chemical and Physical-Chemical Principles of Polyurethane Chemistry.� Polyurethane Handbook. New York: Hanser Publishers. 7-12 14. Ashby, M.F. and Gibson, L.J. (1997). “Cellular Solids-Structures and Properties.� Oxford: Pergamon Press. 15. Lilley, K. and Mani, A. (1996). “Roof-Crush Strength Improvement using Rigid Polyurethane Foam.�
institution Universiti Teknologi Malaysia
collection UTM Institutional Repository
language English
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Zakaria, Hafizawati
Crushworthiness of polymeric foam used as core composite sandwich structure
description PUR foam has been used extensively as core of sandwich structures in the aerospace and automobile industries. The understanding of their behaviour under crush conditions is extremely important for the design and manufacturing of these engineering structures since crush problems are directly related to structural integrity and safety requirements. In this paper, selected foam cored polymer sandwich beam were subjected to static three point bend tests. The beams were loaded beyond first failure to study the nonlinear post failure behaviour. Provided the beam fails in shear of core and skin delamination. The post failure response is dominated by the crushing of the core and upper skin compression. A theoretical model by Mines and Jones is used to simulate the post failure response of the beams. The model assumes an idealized plastic hinge in the central loading point and relates the beam constituent material properties to the beam overall response. The beams were also subjected with impact test. The impact response of foam based sandwich structures has been investigated using a build-up falling weight impact method and load cell system.
format Thesis
qualification_level Master's degree
author Zakaria, Hafizawati
author_facet Zakaria, Hafizawati
author_sort Zakaria, Hafizawati
title Crushworthiness of polymeric foam used as core composite sandwich structure
title_short Crushworthiness of polymeric foam used as core composite sandwich structure
title_full Crushworthiness of polymeric foam used as core composite sandwich structure
title_fullStr Crushworthiness of polymeric foam used as core composite sandwich structure
title_full_unstemmed Crushworthiness of polymeric foam used as core composite sandwich structure
title_sort crushworthiness of polymeric foam used as core composite sandwich structure
granting_institution Universiti Teknologi Malaysia, Faculty of Mechanical Engineering
granting_department Faculty of Mechanical Engineering
publishDate 2006
url http://eprints.utm.my/id/eprint/9657/1/HafizawatiZakariaMFKM2006.pdf
_version_ 1747814770027790336

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