Influence of drying on the mechanical behaviour of flax fibres and their unidirectional composites

被引：155

作者：

Baley, C. ^{[1
]}

Le Duigou, A. ^{[1
]}

Bourmaud, A. ^{[1
]}

Davies, P. ^{[2
]}

机构：

[1] Equipe Polymeres & Composites, LIMATB Lab Ingn Mat Bretagne, F-56321 Lorient, France

[2] IFREMER, Ctr Brest, Mat & Struct Grp, F-29280 Plouzane, France

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2012年 / 43卷 / 08期

关键词：

Flax fibres; Mechanical properties; Water absorption; TENSILE DEFORMATION; PHYSICAL-PROPERTIES; CELLULOSE; WOOD; STEM; DEGRADATION; XYLOGLUCAN; POLYMERS; LOCATION; BINDING;

D O I：

10.1016/j.compositesa.2012.03.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure of flax fibres can be considered as a laminate with layers reinforced by cellulose fibrils. During a single fibre tensile test the S2 layer is subjected to shear. At room temperature, natural fibres contain water absorbed in the cell-walls. This paper examines the influence of this water at two scales: on the tensile behaviour of the flax fibres and on unidirectional plies of flax reinforced epoxy. Drying (24 h at 105 degrees C) is shown to reduce both failure stress and failure strain significantly. Analysis of normal stresses at the accomodation threshold provides an estimation of the shear strength of secondary cell walls as 45 MPa for fibres containing 6.4% by weight of water and only 9 MPa for dried fibres. Results from tensile tests on unidirectional flax/epoxy composites, reinforced by as-received and dried fibres, confirm the influence of drying on strength properties. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：1226 / 1233

页数：8

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