Development of novel green and biocomposite materials: Tensile and flexural properties and damage analysis using acoustic emission

被引:49
作者
Bravo, Alencar [1 ]
Toubal, Lotfi [1 ]
Koffi, Demagna [1 ]
Erchiqui, Fouad [2 ]
机构
[1] Univ Quebec Trois Rivieres, Lab Mech & Ecomat, Trois Rivieres, PQ G9A 5H7, Canada
[2] Univ Quebec Abitibi Temiscamingue, Lab Biomat, Rouyn Noranda, PQ J9X 5E4, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
HIGH-DENSITY POLYETHYLENE; MECHANICAL-PROPERTIES; FAILURE MECHANISMS; THERMAL-PROPERTIES; COUPLING AGENT; COMPOSITES; FIBERS; THERMOPLASTICS;
D O I
10.1016/j.matdes.2014.10.026
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A new green composite made of natural polyethylene (NPE) has never been produced using short birch fibers and compared with others biocomposites with matrices of linear low-density polyethylene (LLDPE) and high-density polyethylene (HDPE). Versions with and without a coupling agent (CA) in fiber ratios of 10, 20, 30 and 40 wt% were produced. Tensile and 3-point flexural tests were conducted to measure the mechanical properties of the composites, and acoustic-emission testing was used to measure the evolution of damage caused by irreversible changes in the materials in correlation with an analysis of the damage modes. It was concluded that the extent of the damage and the contribution of each damage mode depend on the material, the test performed and, especially the presence of a CA. The results prove that the choice of composite for a particular application must be a judicious one and should consider not only the mechanical properties but also the damage processes of the composite, which may be crucial for long-term applications. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:16 / 28
页数:13
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