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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Determination of interface properties from experiments on the fragmentation process in single-fiber composites
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Determination of interface properties from experiments on the fragmentation process in single-fiber composites

机译：通过单纤维复合材料破碎过程的实验确定界面性质

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摘要

This paper attempts to quantify the fracture properties (strength and toughness) of the fiber-matrix interface in composites, using the fragmentation process and debonding growth for HI-Nicalon? SiC single-fiber and T300 carbon single-fiber epoxy (Bisphenol-A type epoxy resin with triethylenetetramine (TETA) as curing agent) composite systems. This method is based on the numerical modeling for the microscopic damage and fragmentation process in single-fiber composite (SFC) tests, with a cohesive zone model (CZM). For the HI-Nicalon~(TM)SiC single-fiber epoxy composite in which the major damage near a fiber break is interfacial debonding, interface properties were reasonably determined as (T_(II,max), G_(IIc)) = (75 MPa, 200 J/m~2). In contrast, for T300 carbon single-fiber epoxy composite, we could not determine unique interfacial properties, since the variation of the cohesive parameters hardly affects the microscopic damage process due to the transition to the damage pattern dominated by matrix cracking.
机译：本文尝试使用HI-Nicalon？的断裂过程和脱胶增长来量化复合材料中纤维-基体界面的断裂特性（强度和韧性）。 SiC单纤维和T300碳单纤维环氧树脂（以三亚乙基四胺（TETA）为固化剂的双酚A型环氧树脂）复合体系。该方法基于单纤维复合材料（SFC）测试中的微观损伤和破碎过程的数值模型，并带有内聚区模型（CZM）。对于HI-Nicalon〜（TM）SiC单纤维环氧复合材料，其中纤维断裂附近的主要破坏是界面剥离，界面性能合理确定为（T_（II，max），G_（IIc））=（75 MPa，200 J / m〜2）。相比之下，对于T300碳单纤维环氧复合材料，我们无法确定独特的界面性能，因为内聚参数的变化几乎不会影响微观损伤过程，因为过渡到基体裂纹占主导的损伤模式。

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