基于一次底波法的玻璃钢容器厚度测量方法研究  

STUDY ON THE METHOD OF MEASURING THE THICKNESS OF COMPOSITE MATERIALS BASED ON ULTRASONIC WAVE

作　　者：刘磨 杨宇清[2] 陆铭慧[1] 张毅萍[1] 罗晓明[2] 桑临春[2] 丁晓欢[1] 

机构地区：[1]南昌航空大学无损检测技术教育部重点实验室,南昌330063 [2]上海市特种设备监督检验技术研究院,上海200333

出　　处：《玻璃钢／复合材料》2017年第1期97-100,共4页Fiber Reinforced Plastics/Composites

摘　　要：玻璃钢由于具有质量轻、强度高和耐热性好等优点,在航空航天、民用产业等领域得到了广泛的应用。对于在役的玻璃钢制品,由于长时间的分化腐蚀或制品中存在分层缺陷等原因,会造成材料厚度发生变化。对于很难找到材料二次底波的高衰减玻璃钢,提出了一种利用一次底波来测量声速,进而求得材料厚度的方法。实验结果表明,利用一次底波法测量几种材料的厚度,误差为±0.15 mm。利用这种方法测量高衰减玻璃钢的厚度是可行的,对于高衰减玻璃钢现场测厚有很大的指导意义。Because of the small proportion,specific strength and modulus,composite materials have been widely used in aerospace,automotive,chemical,textile,mechanical manufacturing,medical and other fields. The composite products in service,due to the long time of differentiation and corrosion or products in the presence of delamination defects and other reasons,will result in changes in the thickness of the material. For high attenuation composite,this paper puts forward a method to measure the velocity of sound by using the time difference between the ultrasonic wave and the first floor,and then the thickness of the material is obtained. The experimental results show that the thickness of several materials is measured by a bottom wave method,and the error is about ±0. 15 mm. It is feasible to use this method to measure the thickness of the composite material with high attenuation. It has great guiding significance for the field thickness measurement of high attenuation composites.

关 键 词：玻璃钢 一次底波 测厚 高衰减 

分 类 号：TB332[一般工业技术—材料科学与工程]