On energy release rates in heterogeneous composite laminates

Research output: Contribution to journalConference Contribution

Abstract

Composite laminates are usually assumed to be homogeneous when determining the energy release rates (ERRs) associated with inter-ply delamination. This short paper discusses the effect of neglecting this assumption by accounting for inter-ply interface layer thickness and the resulting influence that this may have on the ERRs. A global approach is used to analytically determine ERRs for delaminations subject to mode I and mixed mode loading in symmetric double cantilever beam (DCB) samples of a material formed of alternating stiff and compliant layers. In contrast to their homogeneously determined counterparts these ERRs and their mixity are dependent on both sample depth and interface thickness and when compared the conditions under which obvious differences become apparent can be explicitly identified. Some brief conclusions on the application of the analysis to the prescription of practical delamination testing protocols for composite laminates are drawn.
LanguageEnglish
Pages174-181
Number of pages8
JournalProcedia Structural Integrity
Volume2
DOIs
Publication statusPublished - 21 Jul 2016
Event21st European Conference on Fracture - Catania, Italy
Duration: 20 Jun 201624 Jun 2016

Fingerprint

Energy release rate
Laminates
Delamination
Composite materials
Cantilever beams
Testing

Keywords

  • fibre reinforced composite laminate
  • delamination
  • energy release rate (ERR)
  • size effect
  • micropolar (Cosserat) elasticity

Cite this

@article{55e627b20c3a4323b91a17c1dc3bbab4,
title = "On energy release rates in heterogeneous composite laminates",
abstract = "Composite laminates are usually assumed to be homogeneous when determining the energy release rates (ERRs) associated with inter-ply delamination. This short paper discusses the effect of neglecting this assumption by accounting for inter-ply interface layer thickness and the resulting influence that this may have on the ERRs. A global approach is used to analytically determine ERRs for delaminations subject to mode I and mixed mode loading in symmetric double cantilever beam (DCB) samples of a material formed of alternating stiff and compliant layers. In contrast to their homogeneously determined counterparts these ERRs and their mixity are dependent on both sample depth and interface thickness and when compared the conditions under which obvious differences become apparent can be explicitly identified. Some brief conclusions on the application of the analysis to the prescription of practical delamination testing protocols for composite laminates are drawn.",
keywords = "fibre reinforced composite laminate, delamination, energy release rate (ERR), size effect, micropolar (Cosserat) elasticity",
author = "Marcus Wheel",
year = "2016",
month = "7",
day = "21",
doi = "10.1016/j.prostr.2016.06.023",
language = "English",
volume = "2",
pages = "174--181",
journal = "Procedia Structural Integrity",
issn = "2452-3216",

}

On energy release rates in heterogeneous composite laminates. / Wheel, Marcus.

In: Procedia Structural Integrity, Vol. 2, 21.07.2016, p. 174-181.

Research output: Contribution to journalConference Contribution

TY - JOUR

T1 - On energy release rates in heterogeneous composite laminates

AU - Wheel, Marcus

PY - 2016/7/21

Y1 - 2016/7/21

N2 - Composite laminates are usually assumed to be homogeneous when determining the energy release rates (ERRs) associated with inter-ply delamination. This short paper discusses the effect of neglecting this assumption by accounting for inter-ply interface layer thickness and the resulting influence that this may have on the ERRs. A global approach is used to analytically determine ERRs for delaminations subject to mode I and mixed mode loading in symmetric double cantilever beam (DCB) samples of a material formed of alternating stiff and compliant layers. In contrast to their homogeneously determined counterparts these ERRs and their mixity are dependent on both sample depth and interface thickness and when compared the conditions under which obvious differences become apparent can be explicitly identified. Some brief conclusions on the application of the analysis to the prescription of practical delamination testing protocols for composite laminates are drawn.

AB - Composite laminates are usually assumed to be homogeneous when determining the energy release rates (ERRs) associated with inter-ply delamination. This short paper discusses the effect of neglecting this assumption by accounting for inter-ply interface layer thickness and the resulting influence that this may have on the ERRs. A global approach is used to analytically determine ERRs for delaminations subject to mode I and mixed mode loading in symmetric double cantilever beam (DCB) samples of a material formed of alternating stiff and compliant layers. In contrast to their homogeneously determined counterparts these ERRs and their mixity are dependent on both sample depth and interface thickness and when compared the conditions under which obvious differences become apparent can be explicitly identified. Some brief conclusions on the application of the analysis to the prescription of practical delamination testing protocols for composite laminates are drawn.

KW - fibre reinforced composite laminate

KW - delamination

KW - energy release rate (ERR)

KW - size effect

KW - micropolar (Cosserat) elasticity

UR - http://www.sciencedirect.com/science/journal/24523216

UR - http://www.ecf21.eu/site/

U2 - 10.1016/j.prostr.2016.06.023

DO - 10.1016/j.prostr.2016.06.023

M3 - Conference Contribution

VL - 2

SP - 174

EP - 181

JO - Procedia Structural Integrity

T2 - Procedia Structural Integrity

JF - Procedia Structural Integrity

SN - 2452-3216

ER -