Determining the mechanism controlling glass fibre strength loss during thermal recycling of waste composites

被引：40

作者：

Feih, S. ^{[1
,2
]}

Mouritz, A. P. ^{[1
]}

Case, S. W. ^{[3
]}

机构：

[1] RMIT Univ, Sch Aerosp Mech & Mfg Engn, Sir Lawrence Wackett Aerosp Res Ctr, Melbourne, Vic, Australia

[2] Singapore Inst Mfg Technol SIMTech, Polymer Joining Technol Grp, Singapore 638075, Singapore

[3] Virginia Polytech Inst & State Univ, Dept Engn Sci & Mech, Blacksburg, VA 24061 USA

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2015年 / 76卷

关键词：

Glass fibres; Fracture toughness; Fractography; Recycling; TENSILE-STRENGTH; REINFORCED COMPOSITES; FRACTURE-TOUGHNESS; SUBCRITICAL WATER; SILICA GLASS; RELAXATION; STRESS;

D O I：

10.1016/j.compositesa.2015.06.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper presents an experimental investigation into the large reductions to the tensile fracture stress and the associated strength loss mechanism of E-glass fibres during thermal recycling. Fractographic analysis reveals the fracture process is controlled by surface flaws, irrespective of heat treatment temperature and duration. The fracture toughness is an important material property in order to understand possible changes in the strength-flaw relationship during heat treatment. Focussed ion beam (FIB) milling is used to artificially create a single nano-sized deep notch (between 30 and 1000 nm) in glass fibres. The strength loss, fracture toughness, fracture mirror constant and fracture mechanism observed for nano-notched and thermally recycled fibres are identical, indicating bulk property changes do not occur during thermal recycling. The study proves conclusively that surface flaw growth is the controlling mechanism reducing fibreglass strength during thermal recycling of waste polymer composites. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：255 / 261

页数：7

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