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利用声发射技术监测颗粒填充聚合物材料的裂纹扩展过程
引用本文:赵方芳,罗景润,田常津,金周庚,何颖波.利用声发射技术监测颗粒填充聚合物材料的裂纹扩展过程[J].高压物理学报,2000,14(3):235-240.
作者姓名:赵方芳  罗景润  田常津  金周庚  何颖波
作者单位:1. 中物院结构力学研究所,四川绵阳,621900;中物院研究生部,四川绵阳,621900
2. 中物院结构力学研究所,四川绵阳,621900
3. 中物院研究生部,四川绵阳,621900
4. 航天材料及工艺研究所,北京,100076
基金项目:中国物理研究院科研项目,990103,
摘    要: 利用声发射技术监测了颗粒填充聚合物材料含单边缺口试样承受三点弯曲载荷时裂纹尖端形成损伤并断裂的全过程,明显地区分了裂纹尖端起裂和扩展的不同阶段,有效地识别了颗粒填充聚合物材料的破坏模式。研究表明,在承载状态下,裂纹尖端损伤起始和扩展分为3个阶段,且裂纹起裂至快速扩展存在一个演变过程;结合SEM观察结果,判定该材料的断裂模式以颗粒与基材的界面分离为主。

关 键 词:颗粒填充聚合物材料  声发射  损伤  断裂
收稿时间:1999-11-26;
修稿时间:1999-11-26

THE CRACK GROWTH PROCESS OF PARTICULATE FILLED POLYMER MONITORED BY ACOUSTIC EMISSION
ZHAO Fang-fang,LUO Jing-run,TIAN Chang-jin,JIN Zhou-geng,HE Ying-bo.THE CRACK GROWTH PROCESS OF PARTICULATE FILLED POLYMER MONITORED BY ACOUSTIC EMISSION[J].Chinese Journal of High Pressure Physics,2000,14(3):235-240.
Authors:ZHAO Fang-fang  LUO Jing-run  TIAN Chang-jin  JIN Zhou-geng  HE Ying-bo
Institution:1. Institute of Structural Mechanics, CAEP, Mianyang 621900, China;2. Graduate School, CAEP, Mianyang 621900, China;3. Institute of Space Material and Technology, Beijing 100076, China
Abstract:In this paper,acoustic emission technology was used to monitor the crack initiation and propagation of single edge notched specimen of particulate filled polymer under three point bending condition.In the experiments,the initiation and propagation of crack tip were distinctly distinguished,and the damage modes of particulate filled polymer were efficiently identified.The experimental results studied that the initiation and propagation of crack tip can be divided into three periods.SEM results demonstrated that the main fracture mode of the material is the split between filler and matrix.
Keywords:particulate filled polymer  acoustic emission  damage  fracture
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