期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 42, 期 11, 页码 1584-1591出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2011.07.002
关键词
Polymer-matrix composites; Carbon fiber; Mechanical properties; Strength
资金
- Grupo Antolin Ingenieria, Burgos, Spain
Susceptibility to matrix driven failure is one of the major weaknesses of continuous-fiber composites. In this study, helical-ribbon carbon nanofibers (CNF) were dispersed in the matrix phase of a continuous carbon fiber-reinforced composite. Along with an unreinforced control, the resulting hierarchical composites were tested to failure in several modes of quasi-static testing designed to assess matrix-dominated mechanical properties and fracture characteristics. Results indicated CNF addition offered simultaneous increases in tensile stiffness, strength and toughness while also enhancing both compressive and flexural strengths. Short-beam strength testing resulted in no apparent improvement while the fracture energy required for the onset of model interlaminar delamination was enhanced by 35%. Extrinsic toughening mechanisms, e.g., intralaminar fiber bridging and trans-ply cracking, significantly affected steady-state crack propagation values. Scanning electron microscopy of delaminated fracture surfaces revealed improved primary fiber-matrix adhesion and indications of CNF-induced matrix toughening. (C) 2011 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据