Damage in laminated composites under low velocity impact

Composite materials are widely used in aircraft, automotive, marine and railway applications and may be exposed to impact loads, particularly low velocity impact. As material properties of composites are sensitive to strain-rate effects, conducting finite element analysis (FEA) of the impact simulat...

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Main Author:	Che Man, Mohd. Hasrizam
Format:	Thesis
Language:	English
Published:	2014
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.utm.my/id/eprint/53456/25/MohdHasrizamCheManMFKM2014.pdf
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spelling	my-utm-ep.534562020-07-15T02:43:00Z Damage in laminated composites under low velocity impact 2014-02 Che Man, Mohd. Hasrizam TJ Mechanical engineering and machinery Composite materials are widely used in aircraft, automotive, marine and railway applications and may be exposed to impact loads, particularly low velocity impact. As material properties of composites are sensitive to strain-rate effects, conducting finite element analysis (FEA) of the impact simulation by using static material properties would not predict their behaviour accurately. Thus, the aim of this study is to incorporate strain-rate dependent behaviour influence into anisotropic damage model (ADM) and implement it in FEA for impact simulation. The study begins with extracting material properties data for ADM from published experimental data. The mathematical equation established from the extracted material properties were then used to develop the strain-rate dependent ADM and coded using ABAQUS/VUSDFLD, commercial finite element software. The developed strain-rate dependent (SRD) ADM was validated using published tensile test data. Impact simulation was conducted using both the static ADM and strain-rate dependent ADM and the results from the simulations were compared with published three-point bending impact experimental data at impactor speeds of 2, 3, 4 and 5 m/s for both cross-ply and angle-ply laminate orientations. The impact simulation results show that the incorporation of strain-rate dependency in ADM improves the prediction of three-point bending impact simulation reaction force by reducing the mean error from 33% to 14% for cross-ply laminates and from 12% to 10% for angle-ply laminates. This strain-rate dependent ADM impact simulation could thus be implemented as a design tool for analysing the impact damage resistant of laminated composites under low velocity impact. 2014-02 Thesis http://eprints.utm.my/id/eprint/53456/ http://eprints.utm.my/id/eprint/53456/25/MohdHasrizamCheManMFKM2014.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:83981 masters Universiti Teknologi Malaysia, Faculty of Mechanical Engineering Faculty of Mechanical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Che Man, Mohd. Hasrizam Damage in laminated composites under low velocity impact
description	Composite materials are widely used in aircraft, automotive, marine and railway applications and may be exposed to impact loads, particularly low velocity impact. As material properties of composites are sensitive to strain-rate effects, conducting finite element analysis (FEA) of the impact simulation by using static material properties would not predict their behaviour accurately. Thus, the aim of this study is to incorporate strain-rate dependent behaviour influence into anisotropic damage model (ADM) and implement it in FEA for impact simulation. The study begins with extracting material properties data for ADM from published experimental data. The mathematical equation established from the extracted material properties were then used to develop the strain-rate dependent ADM and coded using ABAQUS/VUSDFLD, commercial finite element software. The developed strain-rate dependent (SRD) ADM was validated using published tensile test data. Impact simulation was conducted using both the static ADM and strain-rate dependent ADM and the results from the simulations were compared with published three-point bending impact experimental data at impactor speeds of 2, 3, 4 and 5 m/s for both cross-ply and angle-ply laminate orientations. The impact simulation results show that the incorporation of strain-rate dependency in ADM improves the prediction of three-point bending impact simulation reaction force by reducing the mean error from 33% to 14% for cross-ply laminates and from 12% to 10% for angle-ply laminates. This strain-rate dependent ADM impact simulation could thus be implemented as a design tool for analysing the impact damage resistant of laminated composites under low velocity impact.
format	Thesis
qualification_level	Master's degree
author	Che Man, Mohd. Hasrizam
author_facet	Che Man, Mohd. Hasrizam
author_sort	Che Man, Mohd. Hasrizam
title	Damage in laminated composites under low velocity impact
title_short	Damage in laminated composites under low velocity impact
title_full	Damage in laminated composites under low velocity impact
title_fullStr	Damage in laminated composites under low velocity impact
title_full_unstemmed	Damage in laminated composites under low velocity impact
title_sort	damage in laminated composites under low velocity impact
granting_institution	Universiti Teknologi Malaysia, Faculty of Mechanical Engineering
granting_department	Faculty of Mechanical Engineering
publishDate	2014
url	http://eprints.utm.my/id/eprint/53456/25/MohdHasrizamCheManMFKM2014.pdf
_version_	1747817559701323776

Damage in laminated composites under low velocity impact

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