纺织学报 ›› 2010, Vol. 31 ›› Issue (3): 27-31.

• 纤维材料 • 上一篇    下一篇

聚乙烯自增强复合材料损伤行为的声发射特征

王旭;晏雄   

  1. 东华大学纺织学院 教育部面料技术重点实验室
  • 收稿日期:2009-08-26 修回日期:2009-10-27 出版日期:2010-03-15 发布日期:2010-03-15
  • 通讯作者: 晏雄

Acoustic emission features on damage behaviors of PE self-reinforced composites

WANG Xu;YAN Xiong

  

  1. Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University
  • Received:2009-08-26 Revised:2009-10-27 Online:2010-03-15 Published:2010-03-15

摘要:

为揭示聚乙烯自增强复合材料损伤机制的声发射(Acoustic emission,AE)特征,分别对低密度聚乙烯(LDPE)、单层板的轴向和横向进行准静态拉伸破坏实验,诱导产生基体损伤、界面损伤和纤维损伤并讨论了损伤机制的AE特征。实验表明,不同损伤机制的AE特征具有明显的差异。基体塑性变形的AE幅度和延时分别为40~60 dB、低于800µs;基体断裂分别为75~90 dB、2300~2600µs。不同程度界面损伤的AE幅度和延时分别为40~60 dB、低于500µs;40~80 dB、500~2000µs,高于90 dB、3000~7000µs。单纤维断裂的AE幅度和延时分别为40-75 dB、低于1000µs;纤维束断裂的分别为高于90 dB、1500~2000µs。

Abstract:

The purpose of the present study is to investigate acoustic emission features on damage mechanisms of PE self-reinforced composites. According to quasi-static tensile test on LDPE resin, axial and transverse of unidirectional laminate, matrix damage, interface damage and fiber damage were activated and their AE features were investigated. Experiment revealed that various damage mechanisms resulted in distinct difference in AE features. Matrix plastic transformation and matrix fracture generated AE signal with amplitude 40-60 dB duration less 800µs and amplitude 75-90 dB duration 2300-2600µs respectively. Based on damage level, interface damage generated AE signals with 40-60 dB、less than 500µs,40-80 dB、500-2000µs and over 90 dB、3000-7000µs,respectively. Single fiber breakage and fiber bundle breakage generated AE signals with amplitude 40-75 dB,duration less than 1000µs and over 90 dB、duration 1500-2000µs, respectively.

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