Control of unstable crack propagation through bio-inspired interface modification

Robert Malkin, Richard S. Trask, Ian P. Bond

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Selective toughening can be used to improve specific interfaces in a fibre reinforced polymer (FRP) component which may otherwise act as crack initiation sites. Interfacial tougheners (such as interleaves and powder treatments) have typically been deployed in a simplistic manner. However, by discretely and judiciously introducing toughening agents, taking inspiration from nature, a step change in toughness characteristics can be demonstrated. Cracks propagating through these toughened regions give rise to interesting fracture phenomena. The work presented herein shows that by incorporating regions of variable toughness, unstable crack propagation can be avoided and graceful degradation to failure demonstrated. Using both Mode I double cantilever beam testing and finite element modelling this study shows how selective toughening can be used without unstable crack growth.

Original languageEnglish
Pages (from-to)122-130
Number of pages9
JournalComposites Part A - Applied Science and Manufacturing
Volume46
Issue number1
DOIs
Publication statusPublished - 2013

Fingerprint

Toughening
Crack propagation
Toughness
Cantilever beams
Crack initiation
Powders
Polymers
Cracks
Degradation
Fibers
Testing

Keywords

  • A. Discontinuous reinforcement
  • A. Particle-reinforcement
  • B. Delamination
  • B. Fracture toughness

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials

Cite this

Control of unstable crack propagation through bio-inspired interface modification. / Malkin, Robert; Trask, Richard S.; Bond, Ian P.

In: Composites Part A - Applied Science and Manufacturing, Vol. 46, No. 1, 2013, p. 122-130.

Research output: Contribution to journalArticle

Malkin, Robert ; Trask, Richard S. ; Bond, Ian P. / Control of unstable crack propagation through bio-inspired interface modification. In: Composites Part A - Applied Science and Manufacturing. 2013 ; Vol. 46, No. 1. pp. 122-130.
@article{91855b53f9c647a285e0f6ce4da7099d,
title = "Control of unstable crack propagation through bio-inspired interface modification",
abstract = "Selective toughening can be used to improve specific interfaces in a fibre reinforced polymer (FRP) component which may otherwise act as crack initiation sites. Interfacial tougheners (such as interleaves and powder treatments) have typically been deployed in a simplistic manner. However, by discretely and judiciously introducing toughening agents, taking inspiration from nature, a step change in toughness characteristics can be demonstrated. Cracks propagating through these toughened regions give rise to interesting fracture phenomena. The work presented herein shows that by incorporating regions of variable toughness, unstable crack propagation can be avoided and graceful degradation to failure demonstrated. Using both Mode I double cantilever beam testing and finite element modelling this study shows how selective toughening can be used without unstable crack growth.",
keywords = "A. Discontinuous reinforcement, A. Particle-reinforcement, B. Delamination, B. Fracture toughness",
author = "Robert Malkin and Trask, {Richard S.} and Bond, {Ian P.}",
year = "2013",
doi = "10.1016/j.compositesa.2012.11.001",
language = "English",
volume = "46",
pages = "122--130",
journal = "Composites Part A - Applied Science and Manufacturing",
issn = "1359-835X",
publisher = "Pergamon/Elsevier Science",
number = "1",

}

TY - JOUR

T1 - Control of unstable crack propagation through bio-inspired interface modification

AU - Malkin, Robert

AU - Trask, Richard S.

AU - Bond, Ian P.

PY - 2013

Y1 - 2013

N2 - Selective toughening can be used to improve specific interfaces in a fibre reinforced polymer (FRP) component which may otherwise act as crack initiation sites. Interfacial tougheners (such as interleaves and powder treatments) have typically been deployed in a simplistic manner. However, by discretely and judiciously introducing toughening agents, taking inspiration from nature, a step change in toughness characteristics can be demonstrated. Cracks propagating through these toughened regions give rise to interesting fracture phenomena. The work presented herein shows that by incorporating regions of variable toughness, unstable crack propagation can be avoided and graceful degradation to failure demonstrated. Using both Mode I double cantilever beam testing and finite element modelling this study shows how selective toughening can be used without unstable crack growth.

AB - Selective toughening can be used to improve specific interfaces in a fibre reinforced polymer (FRP) component which may otherwise act as crack initiation sites. Interfacial tougheners (such as interleaves and powder treatments) have typically been deployed in a simplistic manner. However, by discretely and judiciously introducing toughening agents, taking inspiration from nature, a step change in toughness characteristics can be demonstrated. Cracks propagating through these toughened regions give rise to interesting fracture phenomena. The work presented herein shows that by incorporating regions of variable toughness, unstable crack propagation can be avoided and graceful degradation to failure demonstrated. Using both Mode I double cantilever beam testing and finite element modelling this study shows how selective toughening can be used without unstable crack growth.

KW - A. Discontinuous reinforcement

KW - A. Particle-reinforcement

KW - B. Delamination

KW - B. Fracture toughness

UR - http://www.scopus.com/inward/record.url?scp=84872106476&partnerID=8YFLogxK

UR - http://dx.doi.org/10.1016/j.compositesa.2012.11.001

U2 - 10.1016/j.compositesa.2012.11.001

DO - 10.1016/j.compositesa.2012.11.001

M3 - Article

VL - 46

SP - 122

EP - 130

JO - Composites Part A - Applied Science and Manufacturing

JF - Composites Part A - Applied Science and Manufacturing

SN - 1359-835X

IS - 1

ER -