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An investigation into the effects of micro-compressive defects on interphase behaviour in hemp-epoxy composites using half-fringe photoelasticity. / Hughes, Mark; Sebe, Gilles; Hague, James et al.
In: Composite Interfaces, Vol. 7, No. 1, 02.04.2000, p. 13-29.

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Hughes M, Sebe G, Hague J, Hill C, Spear M, Mott L. An investigation into the effects of micro-compressive defects on interphase behaviour in hemp-epoxy composites using half-fringe photoelasticity. Composite Interfaces. 2000 Apr 2;7(1):13-29. doi: 10.1163/156855400300183551

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TY - JOUR

T1 - An investigation into the effects of micro-compressive defects on interphase behaviour in hemp-epoxy composites using half-fringe photoelasticity

AU - Hughes, Mark

AU - Sebe, Gilles

AU - Hague, James

AU - Hill, Callum

AU - Spear, Morwenna

AU - Mott, Laurence

PY - 2000/4/2

Y1 - 2000/4/2

N2 - Half-fringe photoelasticity was used to evaluate the two-dimensional state of stress in epoxy matrix micro-tensile specimens. The experimental technique is described in detail and demonstrated by the measurement of the stress distribution around a circular hole in a thin epoxy film subject to uniaxial tension. The results obtained using this photoelastic technique compare well with theoretical solutions. This system has enabled the mapping of stresses in the matrix of single (hemp) filament composites, strained parallel to the fibre axis, to be undertaken. Concentrations of stress were observed in the interphase region, adjacent to kink bands (micro-compressive defects) and stress concentration factors of ~ 1.4 were recorded. The role that these stress concentrations play in the failure of hemp fibre reinforced composites is discussed.

AB - Half-fringe photoelasticity was used to evaluate the two-dimensional state of stress in epoxy matrix micro-tensile specimens. The experimental technique is described in detail and demonstrated by the measurement of the stress distribution around a circular hole in a thin epoxy film subject to uniaxial tension. The results obtained using this photoelastic technique compare well with theoretical solutions. This system has enabled the mapping of stresses in the matrix of single (hemp) filament composites, strained parallel to the fibre axis, to be undertaken. Concentrations of stress were observed in the interphase region, adjacent to kink bands (micro-compressive defects) and stress concentration factors of ~ 1.4 were recorded. The role that these stress concentrations play in the failure of hemp fibre reinforced composites is discussed.

U2 - 10.1163/156855400300183551

DO - 10.1163/156855400300183551

M3 - Article

VL - 7

SP - 13

EP - 29

JO - Composite Interfaces

JF - Composite Interfaces

SN - 0927-6440

IS - 1

ER -