Delamination resistance of through thickness reinforced composites

Mehdi Yasaee; Galal Mohamed; Giuliano Allegri; Stephen R. Hallett

Delamination resistance of through thickness reinforced composites

Mehdi Yasaee, Galal Mohamed, Giuliano Allegri, Stephen R. Hallett

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

2 Citations (Scopus)

Abstract

In this study the delamination resistance of arrays of Z-pins are measured in Mode I, Mode II and mixed Mode I/II loading scenarios, using standard fracture toughness test methodologies. Through experimental observations and measured results it is shown that the bridging behaviours predicted in previous single pin tests are analogous to the arrays of pins inside fracture toughness coupons. Although it is not feasible to measure the steady state delamination propagation in a through-thickness reinforced (TTR) region in all Mode mixities, a method is proposed to measure the apparent toughness of these TTR pins at predetermined delamination lengths. This method provides useful, conservative results that could improve the design of composite components which contain TTR elements.

Original language	English
Title of host publication	16th European Conference on Composite Materials, ECCM 2014
Publisher	European Conference on Composite Materials, ECCM
ISBN (Print)	9780000000002
Publication status	Published - 1 Jan 2014
Event	16th European Conference on Composite Materials, ECCM 2014 - Seville, Spain Duration: 22 Jun 2014 → 26 Jun 2014

Conference

Conference	16th European Conference on Composite Materials, ECCM 2014
Country/Territory	Spain
City	Seville
Period	22/06/14 → 26/06/14

Research Groups and Themes

Composites UTC

Keywords

Damage tolerance
Delamination testing
Through thickness reinforcement
Z-pins

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@inproceedings{832d77ed544f4c4892730de35fdf60f9,

title = "Delamination resistance of through thickness reinforced composites",

abstract = "In this study the delamination resistance of arrays of Z-pins are measured in Mode I, Mode II and mixed Mode I/II loading scenarios, using standard fracture toughness test methodologies. Through experimental observations and measured results it is shown that the bridging behaviours predicted in previous single pin tests are analogous to the arrays of pins inside fracture toughness coupons. Although it is not feasible to measure the steady state delamination propagation in a through-thickness reinforced (TTR) region in all Mode mixities, a method is proposed to measure the apparent toughness of these TTR pins at predetermined delamination lengths. This method provides useful, conservative results that could improve the design of composite components which contain TTR elements.",

keywords = "Damage tolerance, Delamination testing, Through thickness reinforcement, Z-pins",

author = "Mehdi Yasaee and Galal Mohamed and Giuliano Allegri and Hallett, {Stephen R.}",

year = "2014",

month = jan,

day = "1",

language = "English",

isbn = "9780000000002",

booktitle = "16th European Conference on Composite Materials, ECCM 2014",

publisher = "European Conference on Composite Materials, ECCM",

note = "16th European Conference on Composite Materials, ECCM 2014 ; Conference date: 22-06-2014 Through 26-06-2014",

}

TY - GEN

T1 - Delamination resistance of through thickness reinforced composites

AU - Yasaee, Mehdi

AU - Mohamed, Galal

AU - Allegri, Giuliano

AU - Hallett, Stephen R.

PY - 2014/1/1

Y1 - 2014/1/1

N2 - In this study the delamination resistance of arrays of Z-pins are measured in Mode I, Mode II and mixed Mode I/II loading scenarios, using standard fracture toughness test methodologies. Through experimental observations and measured results it is shown that the bridging behaviours predicted in previous single pin tests are analogous to the arrays of pins inside fracture toughness coupons. Although it is not feasible to measure the steady state delamination propagation in a through-thickness reinforced (TTR) region in all Mode mixities, a method is proposed to measure the apparent toughness of these TTR pins at predetermined delamination lengths. This method provides useful, conservative results that could improve the design of composite components which contain TTR elements.

AB - In this study the delamination resistance of arrays of Z-pins are measured in Mode I, Mode II and mixed Mode I/II loading scenarios, using standard fracture toughness test methodologies. Through experimental observations and measured results it is shown that the bridging behaviours predicted in previous single pin tests are analogous to the arrays of pins inside fracture toughness coupons. Although it is not feasible to measure the steady state delamination propagation in a through-thickness reinforced (TTR) region in all Mode mixities, a method is proposed to measure the apparent toughness of these TTR pins at predetermined delamination lengths. This method provides useful, conservative results that could improve the design of composite components which contain TTR elements.

KW - Damage tolerance

KW - Delamination testing

KW - Through thickness reinforcement

KW - Z-pins

UR - http://www.scopus.com/inward/record.url?scp=84915749414&partnerID=8YFLogxK

M3 - Conference Contribution (Conference Proceeding)

AN - SCOPUS:84915749414

SN - 9780000000002

BT - 16th European Conference on Composite Materials, ECCM 2014

PB - European Conference on Composite Materials, ECCM

T2 - 16th European Conference on Composite Materials, ECCM 2014

Y2 - 22 June 2014 through 26 June 2014

ER -

Delamination resistance of through thickness reinforced composites

Abstract

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Keywords

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