摘要
界面相作为纤维与树脂之间载荷传递的桥梁,其性质对整体复合材料力学性能和耐环境性能有直接影响。本研究用准静态纳米压痕技术对碳纤维T300/环氧E51体系的界面相模量进行测试分析。研究发现,当探针压入深度大于30nm以后,试样表面粗糙度对测试结果的影响可以忽略;同时,三种测试排点方式下的纳米压痕结果表明:纤维增强效应对载荷-压深曲线影响很大,由于压深和压痕间距较大,对于界面相宽度较小的碳纤维环氧复合材料体系,采用准静态纳米压痕技术不易得到其界面相的模量。
The interphase between the fiber and resin matrix is the bridge of the load transfer.It has a strong influece on composite properties.The mechanical behaviour and environmental stability of composites are highly dependent on the morphology and size of the interphase around fibers.In this paper,quasi-static nanoindentation technique is used to study the interphase of the carbon fiber T300/epoxy E51 system.The experimental results show that the effect of surface roughness of the sample on the tested results can be ignored when the indentation depth is larger than 30nm.The fiber stiffening effect has a great influence on the load-displacement curve.Due to the requirement of depenatration depth and indentation space in nanoindentation teset and small size of the interphase in Carbon fiber/Epoxy resin,it is difficult to get the modulus of the interphase of Carbon fiber/Epoxy composites.
出处
《玻璃钢／复合材料》
CAS
CSCD
北大核心
2012年第6期23-27,共5页
Fiber Reinforced Plastics/Composites
基金
国家973项目(2010CB631104)
关键词
碳纤维复合材料
界面
准静态纳米压痕
carbon fiber/epoxy composites
interphase
qusistatic nanoindentation
