Damage progression and defect sensitivity: An experimental study of representative wrinkles in tension

Leo Dominic Bloom; Jinhuo Wang; Kevin D Potter

doi:10.1016/j.compositesb.2012.05.021

Damage progression and defect sensitivity: An experimental study of representative wrinkles in tension

Leo Dominic Bloom, Jinhuo Wang, Kevin D Potter

Research output: Contribution to journal › Article (Academic Journal) › peer-review

124 Citations (Scopus)

Abstract

This paper presents an experimental study on the effect of localised wrinkling defects on the strength of glass reinforced epoxy laminates. A method for generating wrinkles based on the 'natural' mechanism of formation was developed and used to make larger scale laminates, with the aim of being representative of industrial components. Wrinkle severity was characterised using optical microscopy and correlated to the results obtained from tensile testing, which showed that the most serious misalignment can cause a 40% strength knock-down. Two optical systems - Digital Image Correlation and Video Extensometry were used to visualise the strain distribution, which showed highly localised concentrations surrounding the wrinkle. The role of the strain distribution in causing the initiation and progression of damage is explored, and finally some implications for the design of composite components are considered. (c) 2012 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	449-458
Number of pages	10
Journal	Composites Part B: Engineering
Volume	45
Issue number	1
DOIs	https://doi.org/10.1016/j.compositesb.2012.05.021
Publication status	Published - Feb 2013

Keywords

VARIABILITY
COMPOSITE
Mechanical testing
Damage tolerance
FIBER WAVINESS
Wrinkling
Defects

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title = "Damage progression and defect sensitivity: An experimental study of representative wrinkles in tension",

abstract = "This paper presents an experimental study on the effect of localised wrinkling defects on the strength of glass reinforced epoxy laminates. A method for generating wrinkles based on the 'natural' mechanism of formation was developed and used to make larger scale laminates, with the aim of being representative of industrial components. Wrinkle severity was characterised using optical microscopy and correlated to the results obtained from tensile testing, which showed that the most serious misalignment can cause a 40% strength knock-down. Two optical systems - Digital Image Correlation and Video Extensometry were used to visualise the strain distribution, which showed highly localised concentrations surrounding the wrinkle. The role of the strain distribution in causing the initiation and progression of damage is explored, and finally some implications for the design of composite components are considered. (c) 2012 Elsevier Ltd. All rights reserved.",

keywords = "VARIABILITY, COMPOSITE, Mechanical testing, Damage tolerance, FIBER WAVINESS, Wrinkling, Defects",

author = "Bloom, {Leo Dominic} and Jinhuo Wang and Potter, {Kevin D}",

year = "2013",

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doi = "10.1016/j.compositesb.2012.05.021",

language = "English",

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journal = "Composites Part B: Engineering",

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T1 - Damage progression and defect sensitivity: An experimental study of representative wrinkles in tension

AU - Bloom, Leo Dominic

AU - Wang, Jinhuo

AU - Potter, Kevin D

PY - 2013/2

Y1 - 2013/2

N2 - This paper presents an experimental study on the effect of localised wrinkling defects on the strength of glass reinforced epoxy laminates. A method for generating wrinkles based on the 'natural' mechanism of formation was developed and used to make larger scale laminates, with the aim of being representative of industrial components. Wrinkle severity was characterised using optical microscopy and correlated to the results obtained from tensile testing, which showed that the most serious misalignment can cause a 40% strength knock-down. Two optical systems - Digital Image Correlation and Video Extensometry were used to visualise the strain distribution, which showed highly localised concentrations surrounding the wrinkle. The role of the strain distribution in causing the initiation and progression of damage is explored, and finally some implications for the design of composite components are considered. (c) 2012 Elsevier Ltd. All rights reserved.

AB - This paper presents an experimental study on the effect of localised wrinkling defects on the strength of glass reinforced epoxy laminates. A method for generating wrinkles based on the 'natural' mechanism of formation was developed and used to make larger scale laminates, with the aim of being representative of industrial components. Wrinkle severity was characterised using optical microscopy and correlated to the results obtained from tensile testing, which showed that the most serious misalignment can cause a 40% strength knock-down. Two optical systems - Digital Image Correlation and Video Extensometry were used to visualise the strain distribution, which showed highly localised concentrations surrounding the wrinkle. The role of the strain distribution in causing the initiation and progression of damage is explored, and finally some implications for the design of composite components are considered. (c) 2012 Elsevier Ltd. All rights reserved.

KW - VARIABILITY

KW - COMPOSITE

KW - Mechanical testing

KW - Damage tolerance

KW - FIBER WAVINESS

KW - Wrinkling

KW - Defects

U2 - 10.1016/j.compositesb.2012.05.021

DO - 10.1016/j.compositesb.2012.05.021

M3 - Article (Academic Journal)

SN - 1359-8368

VL - 45

SP - 449

EP - 458

JO - Composites Part B: Engineering

JF - Composites Part B: Engineering

IS - 1

ER -

Damage progression and defect sensitivity: An experimental study of representative wrinkles in tension

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Keywords

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