摘要
为了深入理解树脂基碳纤维复合材料的损伤发生和演化规律,制作了三种不同铺层的中心开孔的拉伸试样和一种用于测试层裂的拉伸试样,应用声发射技术全程监测拉伸试验。试验结果分析表明,声发射信号的峰值频率能有效的识别复合材料的各种损伤模式。对在试验过程中采集的声发射信号进行希尔伯特-黄变换,可以有效的分离隐含于声发射信号中的复合材料各种损伤模式,为声发射技术应用于实际复合材料结构的安全监测提供有效方法。
To gain a deeper understanding of the initiation,growth and evolution of the different types of damage,three types of specimens with different lay- ups and orientations and one type of specimen for interlaminar toughness test were subjected to the tensile test along with acoustic emission monitoring. AE signals were collected and post- processed,and the statistical results showed that the peak frequency of AE signal could distinguish various damage modes effectively. After an AE signal was decomposed by Hilbert- Huang Transform（ HHT） method,it might separate and extract all damage modes included in this AE signal apart from damage mode corresponding to the peak frequency. it provides an effective mthod for safety monitor of composites using acoustic emission technique.
出处
《淮阴工学院学报》
CAS
2016年第1期67-71,共5页
Journal of Huaiyin Institute of Technology
基金
国家自然科学基金项目(11402101)
江苏省产业前瞻与共性关键技术(BE2015007-1)
