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

被引：58

作者：

Hughes, M ^{[1
]}

Sèbe, G

Hague, J

Hill, C

Spear, M

Mott, L

机构：

[1] Univ Coll N Wales, BioComposites Ctr, Bangor LL57 2UW, Gwynedd, Wales

[2] Univ Coll N Wales, Sch Agr & Forest Sci, Bangor LL57 2UW, Gwynedd, Wales

[3] Perstorp AB, Perstorp, Sweden

来源：

COMPOSITE INTERFACES | 2000年 / 7卷 / 01期

关键词：

hemp; micro-compressive defects; kink bands; interphase; half-fringe photoelasticity; stress concentrations;

D O I：

10.1163/156855400300183551

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

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 similar to 1.4 were recorded. The role that these stress concentrations play in the failure of hemp fibre reinforced composites is discussed.

引用

页码：13 / 29

页数：17

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