飞机结构强度试验中拉压垫加载技术研究

随着飞机结构中新结构、新材料的大量应用,飞机结构强度试验对无损检测、加载速率提出了很高的要求。传统加载方式如胶布带、卡板等难以满足试验要求,因此,提出了一种采用拉压垫进行结构强度试验加载的方法。首先根据双向加载的要求对拉压垫结构进行了针对性设计,然后研究了拉压垫的材料选择、拉压垫制作和粘贴工艺规程的制定、拉压垫疲劳老化性能,并采用拉压垫加载技术进行了试验验证和实际应用。实际应用结果证明:结构强度试验中,采用拉压垫加载技术能够准确、高效的完成多加载节点拉压双向载荷的施加,便于结构的无损检测,能够显著的缩短试验准备周期,加快试验加载速率。

The Research of Tension/Compression Pad Load TechniqueinStructure Strength Test

With wide application of new structure and new material, the structure strength test put higher request to NDT,loading rate.The traditional loading method, such as canvas-pad,lock board, can not meet the demands. In this paper a new loading method which use tension/compression pad is presented. Firstly the structure of tension/compression padis designed based on the demand of tension/compression load.then the material for tension/compression pad is selected , the process planning of manufacturing and bonding tension/compression pad is drawn up, the fatigue and aging performance is studied. thenthe tension/compression pad load technique is verified and applied.Results show,the Application of tension/compression pad load technique can apply tension/compression load to multi-node accurately and efficiently, be convenient for NDT, shorten the test preparation cycle observably,and accelerate test loading rate.