高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (6): 987.

• 论文 • 上一篇    下一篇

几种高聚物拉伸过程中的声发射现象

祖小涛, 吴继红, 刘民治   

  1. 四川联合大学物理系, 成都 610064
  • 收稿日期:1995-05-31 出版日期:1996-06-24 发布日期:1996-06-24
  • 通讯作者: 祖小涛,男,30岁,硕士,副教授.
  • 作者简介:祖小涛,男,30岁,硕士,副教授.
  • 基金资助:

    国家自然科学基金;中国科学院金属研究所材料疲劳与断裂国家重点实验室资助

The Phenomena of Tensile Acoustic Emission of PS,POM,ABS and PC

ZU Ziao-Tao, WU Ji-Hong, LIU Min-Zhi   

  1. Department of Physics, Sichun Union University, Chengdu, 610064
  • Received:1995-05-31 Online:1996-06-24 Published:1996-06-24

摘要: 研究了4种塑料PS、POM、ABS和PC拉伸过程中的声发射现象,发现声发射信号主要产生在屈服前和断裂时,说明高聚物的声发射信号主要是由于分子链的解缠结、晶体的滑移、裂纹的亚临界扩展和分子链的断裂等诸因素产生的。ABS拉伸时大面积银纹的生成也可能是信号源。拉伸应变速率、材料的结构和不同的屈服过程等对塑料的拉伸声发射规律有较大影响。

关键词: 拉伸, 声发射, 应变速率

Abstract: The tensile acoustic emission(AE) phenomena of PS,POM,ABSand PCwere studied.It was found that AEsignals are mainly produced before yielding and during fracture.That illustrated the production of AEsignals of polymers is mainly due to the unbinding of the molecular chains,the slip of crystalline,the subcritical crack propagation and the fracture of molecular chains.Crazing in a large scale may be a source of AEsignals,The tensile strain rate,plastics'construct and the different yielding processes have great influence on the law of tensile acoustic emission of plastics

Key words: Tensile, Acoustic emission, Strain rate

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