C/SiC复合材料拉伸过程的声发射研究

基金项目:

国家杰出青年科学基金（50425208），国家自然科学基金重大计划重点项目（90405015），西北工业大学博士创新基金（CX200406）

详细信息

Acoustic Emission Characteristics of C/SiC Composite during Tensile Test

摘要: 利用声发射(AE)技术对C/SiC复合材料试样拉伸试验过程进行动态监测。通过声发射多参数分析法对拉伸过程中的声发射累计能量和平均持续时间随载荷或时间的变化进行了综合分析；同时对拉伸过程中典型AE信号的频率特征进行了分析，揭示了C/SiC复合材料拉伸损伤的演化过程及规律，给出了材料拉伸损伤发展的不同阶段以及各阶段损伤类型。通过声发射累计能量随载荷变化的斜率突变定义了材料临界损伤强度。
- 复合材料 /
- 声发射 /
- 拉伸 /
- 损伤演化
Abstract: Acoustic emission (AE) was used during monotonic tensile tests to analyze the tensile behavior and damage evolution of C/SiC composite. A multi-parameters approach was introduced to analyze damage evolution, different damage phases and types of damage by AE data. The frequency of AE signals was also differentiated to recognize the different AE sources. Critical damage stress described with AE cumulate energy was also defined.
- Composite /
- Acoustic emission /
- Tensile /
- Damage evolution

[1]	Evans AG, Mashall DA. The mechanical behavior of ceramic matrix composite［J］. Acta Metall,1989,37:2567-2583.
[2]	Sata N, Kurachi T. Progress in acoustic emission Ⅶ\[A\]. Edited by Kishi T, Mori Y, Enoki M. Proc 12th Intern AE Symp［C］. Sapporo Japan: Jap Soc of NDI,1994.59.
[3]	Lee JS, Lee JO, Oh SK. Progress in acoustic emission Ⅵ\[A\]. Edited by Kishi T, Mori Y, Enoki M. Proc 12th Intern AE Symp［C］. Sapporo Japan: Jap Soc of NDI,1994.52.
[4]	勝山邦久著，冯夏庭译.声发射(AE)技术的应用\[M\].北京: 冶金工业出版社,1997.90-92.
[5]	Surgeon M, Vanswijgenhoven E, Wevers M, et al. Acoustic emission during tensile testing of SiC-fiber-reinforced BMAS glass-ceramic composites\[J\]. Composites Part A,1997,28A(5):473-480.
[6]	Morscher Gregory N. Modal acoustic emission of damage accumulation in a woven SiC/SiC composite\[J\]. Composites Science and Technology,1999,59(5):687-697.
[7]	阳建红，王芳文，覃世勇. HTPB复合固体推进剂的声发射特性及损伤模型的实验和理论研究\[J\].固体火箭技术,2000,23(3):37-40.
[8]	金周庚，刘哲军，王健，等. B/Al复合材料变形和断裂过程声发射特性\[J\].稀有金属,1999,23(3):162-165.