Relation between interfacial shear strength and compressive strength of carbon fiber/epoxy resin composite strands

被引:83
作者
Kim, JH [1 ]
Shioya, M [1 ]
Nakatani, M [1 ]
机构
[1] Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, Tokyo 1528552, Japan
关键词
compressive strength; interfacial shear strength; carbon fiber; epoxy resin; composite;
D O I
10.1163/156855400750262932
中图分类号
TB33 [复合材料];
学科分类号
摘要
The mechanism with which the fiber-matrix interfacial strength exerts its influence on the compressive strength of fiber reinforced composites has been studied by measuring the axial compressive strength of carbon fiber/epoxy resin unidirectional composite strands having different levels of interfacial shear strength. The composite strands are used for experiments in order to investigate the compressive strength which is not affected by the delamination taking place at a weak interlayer of the laminated composites. The interfacial strength is varied by applying various degrees of liquid-phase surface treatment to the fibers. The efficiency of the compressive strength of the fibers utilized in the strength of the composite strands is estimated by measuring the compressive strength of the single carbon filaments with a micro-compression test. The compressive strength of the composite strands does not increase monotonically with increasing interfacial shear strength but showes lower values at higher interfacial shear strengths. With increasing interfacial shear strength, the suppression of the interfacial failure in the misaligned fiber region increases the compressive strength, while at higher interfacial shear strengths, the enhancement of the crack sensitivity decreases the compressive strength.
引用
收藏
页码:443 / 458
页数:16
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