The work aims to evaluate the risk of damage caused by shear deformation at the adhesive interface of long-term vertical storage solid engines.High temperature accelerated aging was performed on the shear specimens at the adhesive inter-face of solid engines,followed by constant speed tensile shear tests on the aged shear specimens.Based on the shear test results,the aging law of mechanical properties of the adhesive interface of solid engines was summarized.Based on the Arrhenius equa-tion extrapolation,a shear deformation failure criterion considering aging at the adhesive interface of solid engines was ob-tained.This failure criterion was used to evaluate the risk of damage to the adhesive interface of a certain type of solid engine stored vertically for 15 years due to shear deformation.After 15 years of aging,the maximum shear deformation of the adhesive interface was 0.792 6 rad,which was 5.31%lower than the initial performance.A certain type of solid engine was selected for long-term vertical storage condition calculation,and the simulation results showed that the tangential strain value at the hazard-ous point of the adhesive interface of the solid engine after 15 years of vertical storage was 0.463 3 rad.This value was less than the starting point of shear deformation and failure of the adhesive interface after 15 years of aging,indicating that the degree of interface shear deformation of the engine did not reach the failure threshold.This failure criterion can intuitively evaluate the risk of damage to the adhesive interface of long-term vertical storage solid engines due to shear deformation,providing refer-ence for the structural integrity assessment of the adhesive interface of long-term storage solid engines.
solid engineslong-term storagehigh temperature accelerationinterface agingshear failurestructural integ-rity assessment
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