新型炭材料2004，Vol.19Issue(2)：97-102,6.
采用Z-Pin增强体的3D炭/炭复合材料层间断裂行为
Interlaminar fracture behavior of 3D C/C composites using z-pins as through-thickness reinforcements
摘要
Abstract
A novel form of preform consisting of plain weave fabric and z-pin through-thickness reinforcements was prepared. The carbon matrix was derived from a combination of isothermal chemical vapor infiltration and high pressure impregnation-carbonization of coal tar pitch. The interlaminar shear strength of the composites was characterized by a short beam interlaminar shear test and a double edge-notched tensile shear test. Hyper pseudoplastic fracture behavior of short beam interlaminar shear of 3D C/C composites was found, which is ascribed to the propagation of microcracks formed between laminations within and between bundles. Z-pins can have effective control over the progress of pseudoplastic fracture. True shear failure, which is characterized by the double edge-notched tensile test, shows non-pseudoplastic fracture progress that is ascribed to shear sliding occurring only within one interlamination. Both short beam interlaminar strength and double edge-notched tensile strength is 40～50 % higher for a z-pin density of 1.5 mm interval than for a z-pin density of 2.5 mm interval. Employing z-pins as through-thickness reinforcements has advantages over a 3D weave.关键词
层间破坏/3D C/C复合材料/Z-pin/假塑性Key words
Interlaminar fracture/3D C/C composite/Z-pin/Pseudoplastic分类
通用工业技术引用本文复制引用
韩立军,李铁虎,刘建军,邱海鹏,丁海英..采用Z-Pin增强体的3D炭/炭复合材料层间断裂行为[J].新型炭材料,2004,19(2):97-102,6.基金项目
国防预研基金(51461070103ZS5003) （51461070103ZS5003）
