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http://dx.doi.org/10.5139/JKSAS.2021.49.10.813

Study on the Dynamic Stress-Strain Behavior of Solid Propellant Using Low-Velocity Impact Test  

Hwang, Jae-Min (Department of Aerospace Engineering, Chungnam National University)
Go, Eun-Su (Department of Aerospace Engineering, Chungnam National University)
Jo, Hyun-Jun (Department of Aerospace Engineering, Chungnam National University)
Kim, In-Gul (Department of Aerospace Engineering, Chungnam National University)
Kim, Jae-Hoon (Department of Mechanical Engineering, Chungnam National University)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.49, no.10, 2021 , pp. 813-820 More about this Journal
Abstract
In this study, a low-velocity impact test was performed to obtain the dynamic properties of solid propellants. The dynamic behavior of the solid propellant was examined by measuring the force and displacement of the impactor during the low-velocity impact test. The bending displacement was calculated by compensating for the local displacement caused by the low-velocity impact test in the form of three point bending and the shear displacement caused by using a short and thick solid propellant specimen. Stress and strain were calculated using compensated displacements and measured force, and dynamic properties of solid propellants were obtained from the stress-strain curve and compared with static bending test. The dynamic properties of solid propellant under the low-velocity impact loading at various operating temperature conditions such as room temperature(20 ℃), high temperature(63 ℃), and low temperature(-32 ℃) were compared and investigated.
Keywords
Low-Velocity Impact Test; Strain-Rate; Dynamic Properties; Displacement Compensation;
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