Experimental determination of the true epoxy resin strength using micro-scaled specimens
Experimental determination of the true epoxy resin strength using micro-scaled specimens
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DOI：
10.1016/j.compositesa.2006.08.006
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发表时间：
2007-01-01
影响因子：
8.7
通讯作者：
Tanaka, Mototsugu
中科院分区：
文献类型：
--
作者：
Hobbiebrunken, Thomas;Fiedler, Bodo;Tanaka, Mototsugu
在纤维增强复合材料中，基体为连续相，但纤维间距离较小。材料的强度和塑性变形能力既受基体物理特性的控制，也受作用应力状态和受应力体积的控制。介绍了一种以环氧树脂为原料生产纤维的新方法。单纤维强度按照单纤维试验的标准试验方法进行测定。这些薄环氧树脂纤维的强度实测数据与理论强度接近（60%）。断裂的机制被断口学研究确定为先前存在的空洞或空洞成核和生长引起的内聚破坏。在最终断裂之前，纤维表现出颈缩和塑性变形，这对脆性环氧树脂来说是一种令人惊讶的行为。(c) 2006 Elsevier Ltd.版权所有。
In fibre reinforced composite materials, the matrix is the continuous phase, but the inter-fibre distance is rather small. The strength and the capability of plastic deformation is controlled by the matrix physics properties as well as by the acting stress state and the stressed volume. A new method is explained to produce fibres from epoxy resin. The single fibre strength was measured according to the standard test method for single fibre tests. The measured strength data of these thin epoxy resin fibres is close (60%) to the theoretical strength. The mechanism of fracture was identified by fractographic studies as cohesive failure initiated at pre-existing voids or void nucleation and growth. Before final rupture, the fibres showed necking and plastic deformation, which is a surprising behaviour for a brittle epoxy resin. (c) 2006 Elsevier Ltd. All rights reserved.