Meso-scale strain mapping in UD woven composites

P. Potluri; R. J. Young; K. Rashed; A. Manan; Y. T. Shyng

doi:10.1016/j.compositesa.2009.09.011

Meso-scale strain mapping in UD woven composites

P. Potluri, R. J. Young, K. Rashed, A. Manan, Y. T. Shyng

Research output: Contribution to journal › Article › peer-review

Abstract

Unidirectional (UD) woven laminates have complex tow geometry due to unbalanced weave architecture. Warp tows are held together by fine weft. Unit cell models for textile composites found in the literature are based on balanced weaves with identical warp and weft specifications. In this paper, unit cell geometry of unbalanced UD weaves has been considered. Unbalanced laminates have complex tow geometry with in-plane tow waviness and a significant overlap between adjacent tows. Main objective of this work is to measure full-field strain distribution at meso-scale or unit cell level and compare the results with FE analysis. Raman spectroscopy is a powerful technique for in situ strain measurement. A UD woven composite laminate with Kevlar fibres is used in this study, as Kevlar fibres exhibit clear Raman band shifts under strain. Influence of in-plane tow waviness on local strain gradients has been demonstrated. © 2009 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	1838-1845
Number of pages	7
Journal	Composites Part A: Applied Science and Manufacturing
Volume	40
Issue number	12
DOIs	https://doi.org/10.1016/j.compositesa.2009.09.011
Publication status	Published - Dec 2009

Keywords

A. Aramid fibre
B. Stress concentration
C. Micro-mechanics
E. Weaving

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10.1016/j.compositesa.2009.09.011

Cite this

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title = "Meso-scale strain mapping in UD woven composites",

abstract = "Unidirectional (UD) woven laminates have complex tow geometry due to unbalanced weave architecture. Warp tows are held together by fine weft. Unit cell models for textile composites found in the literature are based on balanced weaves with identical warp and weft specifications. In this paper, unit cell geometry of unbalanced UD weaves has been considered. Unbalanced laminates have complex tow geometry with in-plane tow waviness and a significant overlap between adjacent tows. Main objective of this work is to measure full-field strain distribution at meso-scale or unit cell level and compare the results with FE analysis. Raman spectroscopy is a powerful technique for in situ strain measurement. A UD woven composite laminate with Kevlar fibres is used in this study, as Kevlar fibres exhibit clear Raman band shifts under strain. Influence of in-plane tow waviness on local strain gradients has been demonstrated. {\textcopyright} 2009 Elsevier Ltd. All rights reserved.",

keywords = "A. Aramid fibre, B. Stress concentration, C. Micro-mechanics, E. Weaving",

author = "P. Potluri and Young, {R. J.} and K. Rashed and A. Manan and Shyng, {Y. T.}",

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T1 - Meso-scale strain mapping in UD woven composites

AU - Potluri, P.

AU - Young, R. J.

AU - Rashed, K.

AU - Manan, A.

AU - Shyng, Y. T.

PY - 2009/12

Y1 - 2009/12

N2 - Unidirectional (UD) woven laminates have complex tow geometry due to unbalanced weave architecture. Warp tows are held together by fine weft. Unit cell models for textile composites found in the literature are based on balanced weaves with identical warp and weft specifications. In this paper, unit cell geometry of unbalanced UD weaves has been considered. Unbalanced laminates have complex tow geometry with in-plane tow waviness and a significant overlap between adjacent tows. Main objective of this work is to measure full-field strain distribution at meso-scale or unit cell level and compare the results with FE analysis. Raman spectroscopy is a powerful technique for in situ strain measurement. A UD woven composite laminate with Kevlar fibres is used in this study, as Kevlar fibres exhibit clear Raman band shifts under strain. Influence of in-plane tow waviness on local strain gradients has been demonstrated. © 2009 Elsevier Ltd. All rights reserved.

AB - Unidirectional (UD) woven laminates have complex tow geometry due to unbalanced weave architecture. Warp tows are held together by fine weft. Unit cell models for textile composites found in the literature are based on balanced weaves with identical warp and weft specifications. In this paper, unit cell geometry of unbalanced UD weaves has been considered. Unbalanced laminates have complex tow geometry with in-plane tow waviness and a significant overlap between adjacent tows. Main objective of this work is to measure full-field strain distribution at meso-scale or unit cell level and compare the results with FE analysis. Raman spectroscopy is a powerful technique for in situ strain measurement. A UD woven composite laminate with Kevlar fibres is used in this study, as Kevlar fibres exhibit clear Raman band shifts under strain. Influence of in-plane tow waviness on local strain gradients has been demonstrated. © 2009 Elsevier Ltd. All rights reserved.

KW - A. Aramid fibre

KW - B. Stress concentration

KW - C. Micro-mechanics

KW - E. Weaving

U2 - 10.1016/j.compositesa.2009.09.011

DO - 10.1016/j.compositesa.2009.09.011

M3 - Article

SN - 1878-5840

VL - 40

SP - 1838

EP - 1845

JO - Composites Part A: Applied Science and Manufacturing

JF - Composites Part A: Applied Science and Manufacturing

IS - 12

ER -

Meso-scale strain mapping in UD woven composites

Abstract

Keywords

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