改性双基推进剂药柱表面静动态应变测量方法

针对推进剂药柱材料线胀系数大、应变大,传统的电测技术测量其表面应变时死片率高的问题,该文采用近似将应变片植入推进剂装药的粘贴技术,建立了一种改进的测量改性双基推进剂药柱表面应变的电测法。应用该法测量了单孔推进剂药柱在静载荷和冲击载荷作用下的应变响应过程,分析了推进剂材料的延滞回复现象。结果表明:该方法可以准确地测量药柱的的静态、准静态及动态应变等粘弹性力学特征,适于固体火箭发动机推进剂药柱的结构完整性研究。

Measurement on Static and Dynamic Strain of Modified Double-base Propellant Grain Surface

In view of the large linear expansion coefficient,large strain of the propellant grain materials and highdeath piecerate when measuring the surface strain,an improved electrical measurement method for modified double-base propellant grain surface strain is given here.The paste technology is adopted to implant the stain gauges into the propellant grain.Using the improved electrical measurement method,the response process of the single-hole propellant grain strain is tested under the static and impact loads.T...