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Damage sequence in thin-ply composite laminates under out-of-plane loading

The study of the damage sequence in polymer-based composite laminates during an impact event is a difficult issue. The problem can be more complex when the plies are thin. In this paper, quasi-static indentation tests were conducted on thin-ply laminates to understand qualitatively the damage mechanisms and their sequence during low-velocity impact loading. TeXtreme® plain weave plies were used with two different thicknesses, 0.08 mm and 0.16 mm (referenced as ultra-thin-ply and thin-ply, respectively), and tested under different load levels. Load-displacement curves were analyzed and the extent of damage was inspected using optical microscopy and ultrasonic technique. The results showed that the damage onset occurs earlier in thin-ply laminates. The damage onset in thin-ply laminates is matrix cracking which induces delaminations, whereas for ultra-thin-ply laminates is due to delaminations which are induced by shear forces and small amount of matrix cracking. Moreover, the fiber breakage appears earlier in ultra-thin-ply laminates

This work has been partially funded by the Spanish Government (Ministerio de Economia y Competitividad) and the European Union under contracts DPI2012-34465, MAT2013-46749-R and MAT2015-69491-C3-1-R, and by the financial support of ERANet AirTN 01/2012 under the project entitled ‘‘Damage tolerance for thin ply textile composites (DAMTEX)”

Elsevier

Manager: Ministerio de Economía y Competitividad (Espanya)
Author: Wagih Abdallah Abdel Hady, Ahmed
Maimí Vert, Pere
González Juan, Emilio Vicente
Blanco Villaverde, Norbert
Sainz de Aja, J.R.
Escalera, F.M de la
Olsson, R.
Álvarez, E.
Abstract: The study of the damage sequence in polymer-based composite laminates during an impact event is a difficult issue. The problem can be more complex when the plies are thin. In this paper, quasi-static indentation tests were conducted on thin-ply laminates to understand qualitatively the damage mechanisms and their sequence during low-velocity impact loading. TeXtreme® plain weave plies were used with two different thicknesses, 0.08 mm and 0.16 mm (referenced as ultra-thin-ply and thin-ply, respectively), and tested under different load levels. Load-displacement curves were analyzed and the extent of damage was inspected using optical microscopy and ultrasonic technique. The results showed that the damage onset occurs earlier in thin-ply laminates. The damage onset in thin-ply laminates is matrix cracking which induces delaminations, whereas for ultra-thin-ply laminates is due to delaminations which are induced by shear forces and small amount of matrix cracking. Moreover, the fiber breakage appears earlier in ultra-thin-ply laminates
This work has been partially funded by the Spanish Government (Ministerio de Economia y Competitividad) and the European Union under contracts DPI2012-34465, MAT2013-46749-R and MAT2015-69491-C3-1-R, and by the financial support of ERANet AirTN 01/2012 under the project entitled ‘‘Damage tolerance for thin ply textile composites (DAMTEX)”
Format: application/pdf
Document access: http://hdl.handle.net/10256/12563
Language: eng
Publisher: Elsevier
Collection: info:eu-repo/semantics/altIdentifier/doi/10.1016/j.compositesa.2016.04.010
info:eu-repo/semantics/altIdentifier/issn/1359-835X
info:eu-repo/grantAgreement/MINECO//DPI2012-34465/ES/EVALUACION DE COMPOSITES LAMINADOS DE CAPAS FINAS PARA APLICACIONES AERONAUTICAS Y AEROESPACIALES/
info:eu-repo/grantAgreement/MINECO//MAT2013-46749-R/ES/DIAGRAMAS DE FACTORES DE CONCENTRACION DE TENSIONES PARA MATERIALES CASI-FRAGILES/
info:eu-repo/grantAgreement/MINECO//MAT2015-69491-C3-1-R/ES/HIBRIDACION LOCAL DE MATERIALES COMPUESTOS LAMINADOS PARA MEJORAR SU TOLERANCIA AL DAÑO/
Rights: Tots els drets reservats
Subject: Polímers
Polymers
Materials compostos -- Deslaminatge
Composite materials -- Delamination
Resistència de materials
Strength of materials
Title: Damage sequence in thin-ply composite laminates under out-of-plane loading
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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