Results 1 to 10 of about 7,250 (196)
Theoretical stress mechanism and structural integrity of viscoelastic propellant grains with variable Poisson’s ratio [PDF]
Scientific ReportsFor the propellant grain of solid rocket motors (SRMs) with circular inner surfaces, the generalized Maxwell model (GMM) and the generalized Kelvin–Voigt model (GKV) are used to characterize the relaxation properties of the grain’s elastic modulus and ...
Xueren Wang +5 more
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Position Normalization of Propellant Grain Point Clouds
AerospacePoint cloud data obtained from scanning propellant grains with 3D scanning equipment exhibit positional uncertainty in space, posing significant challenges for calculating the relevant parameters of the propellant grains.
Junchao Wang +5 more
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Research on the influence of loading rate on the dynamic initiation fracture toughness of CMDB propellant [PDF]
Scientific ReportsIn the field of gun launched missile extended range rocket, the propellant grain in the rocket needs to withstand significant launch loads during their firing phase, and also bear the high pressure caused by ignition, and the impact of launch overloads ...
Jian Zheng +5 more
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A numerical method for solid propellant grain design [PDF]
Scientific Technical Review, 2018 In this study, a grain burnback analysis for an Anchor solid propellant grain geometry for a rocket motor was done. The design process involves parametric modeling of the geometry in using PTC Creo software through dynamic variables that define the ...
Tanaskovski Bojan +3 more
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Xibei Gongye Daxue Xuebao, 2022 Aiming at the structural response characteristics of solid rocket motor (SRM) under vertical storage conditions, the creep tests of HTPB propellant under different stress levels were carried out, and the creep constitutive model of the propellant was ...
CHEN Ke +4 more
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Methodology for Testing High-Energy Materials Under Low Temperature Conditions [PDF]
Problemy Mechatroniki, 2021 The methodology developed for testing gun propellants at low temperatures according to PN-EN ISO 604:2006 is presented in the paper. Brief characteristics are given of the materials tested and the most important static compression test conditions, such ...
Patryk MODRZEJEWSKI, Jacek JANISZEWSKI
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Self-assembly of self-propelled magnetic grains [PDF]
EPJ Web of Conferences, 2021 In this work, we study bidisperse mixtures of self-propelled magnetic particles of different shapes via discrete element method simulations. We show how these particles self-assemble into clusters and how these clusters depend on the ratio of the mixture, the magnetic interaction, and the shape of the grains.
Marcos A. Madrid +3 more
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International Journal of Aerospace Engineering, 2023 In this study, the effect of the axial gap on the mechanical response of a cartridge-loaded propellant grain under vibration loads is investigated. The wide strain rate range of uniaxial compression tests (1.7×10−3~4×103 s−1) on the composite modified ...
Yiming Zhang +6 more
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Using the Impulse Method to Determine High-Pressure Dynamic Burning Rate of Solid Propellants
Aerospace, 2023 A new method for determining the burning rate of a solid propellant, called the Impulse Method, is proposed in this paper. It is based on the proportional relationship between the impulse generated and the mass of the burned propellant. The pressure–time
Jiahao Liu +3 more
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Parametric study of solid propellant slotted grain
IOP Conference Series: Materials Science and Engineering, 2021 Abstract One of the goals in solid rocket motor design is to have as large volumetric loading as possible keeping the basic requirements unaffected. Slotted grain can achieve this goal as it has the advantages of sliver-free and no stress-concentration regions that occur in other internal burning grains as star grain and wagon wheel ...
M El-Naggar, H Belal, H M Abdalla
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