中山大学学报自然科学版 ›› 2010, Vol. 49 ›› Issue (3): 42-46.

• 研究论文 • 上一篇    下一篇

掺量对聚丙烯纤维增强水泥力学特性的影响

陈江平, 张亚芳   

  1. (广州大学土木工程学院,广东 广州 510006)
  • 收稿日期:2009-08-15 修回日期:1900-01-01 出版日期:2010-05-25 发布日期:2010-05-25
  • 通讯作者: 张亚芳

The Impact on Mechanical Properties of Polypropylene Fiber Reinforced Cement with Different Incorporation Rate

CHEN Jiangping,ZHANG Yafang   

  1. (Faculty of Civil Engineering,Guangzhou University,Guangzhou 50006,China)
  • Received:2009-08-15 Revised:1900-01-01 Online:2010-05-25 Published:2010-05-25

摘要: 针对聚丙烯纤维增强水泥(PPRC)材料建立了不同纤维掺量的PPRC数值分析模型,实现了模拟试件从微裂纹萌生、扩展、相互作用及贯通的全破坏过程,并研究其破裂失稳的基本规律,包括声发射的时空分布规律及其失稳的前兆模式。研究表明,随着聚丙烯纤维掺量的增加,PPRC的弯折强度得到提高,韧性也不断增强。

关键词: 聚丙烯纤维增强水泥, 掺量, 细观模拟, 破坏过程, 声发射

Abstract:

Numuerical models of polypropylene fiber reinforced cement (PPRC) with different incorporation rate have been built to analyze PPRC material. With these models the fracture track, crack initiation, coalescence and development, interaction and final penetration have all been simulated. In the meantime, some basic issues during failure process, like spatiotemporal distribution of acoustic emission and precursor pattern of the failure have also been investigated. The results show that the toughness and the bending strength have been improved with increasing polypropylene fiber incorporation rate.

Key words: PPRC, incorporation rate, microsimulation, failure process, acoustic emission

中图分类号: