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针对固体发动机部件保险机构所出现破坏现象，对其进行了激光散斑和电阻应变法联合测试．由于保险机构在高温和高压环境下工作，材料有蠕变现象，出现较大的热变形，传统的光测方法无法实施，发展了一种叠合散斑技术，使之能够对大变形进行非接触式测量，在实验室测试的基础上，对保险机构进行了热容器试验，测量了点火后应变随时间的变化规律．实验结果发现，在保险机构机体上存在着一个接近破坏应力的高危应力区，这是保险机构破坏的主·要因素之一．提出进一步改善其力学性能的措施，获得了满意的效果．
Aiming at the damage phenomenon of solid engine parts and components insurance institutions, the laser speckle and resistance strain method were tested. Due to the creep phenomenon of materials and the large thermal deformation due to the work of insurance institutions under the conditions of high temperature and high pressure, the traditional photometric method can not be implemented and a composite speckle technique has been developed to enable large deformation Contact measurement, based on the laboratory test, conducted a thermal container test on the insurance agency and measured the variation of the strain after ignition with time. The experimental results show that there exists a high-stress zone close to the failure stress in the body of the insurance agency, which is one of the main factors in the destruction of the insurance agency. Proposed to further improve the mechanical properties of measures to obtain satisfactory results.