一、引言 纤维增强复合材料在受力过程有着丰富的声发射。国外在六十年代末和七十年代初,和对这方面的工作进行了许多试验研究和报导。近数年来,随着碳纤维增强塑料的研究发展,对纤维增强复合材料的声发射特性进行了更多更深入的研究工作。国内近几年来,运用声发射技术对增强塑料的研究工作引起了很大的重视并有所发展。 我们利用声发射技术对纤维缠绕玻璃钢气瓶强度预测方面做了一些工作。在七八年以前,那时我们技术手段单一,工作比较粗糙,许多试验现象和结果都有待于进一步研究分 I. INTRODUCTION Fiber reinforced composites have a lot of acoustic emission in the process of stress. In the late 1960s and early 1970s, many experiments and reports were made on the work in this area abroad. In recent years, with the research and development of carbon fiber reinforced plastics, the acoustic emission properties of fiber reinforced composites have been studied more and more deeply. In recent years, the use of acoustic emission technology to enhance the plastic research has attracted great attention and development. We have done some work on the strength prediction of fiber-wound FRP gas cylinders using acoustic emission technology. Before 1978, when we had a single technical means and a rough work schedule, many test phenomena and results have yet to be further studied