Simulation of Stress Relaxation Behaviour of Composite Propellants with Varying Solid Loading Using the Generalized Maxwell Model

• Autorzy: Bihari Bipin Kumar , Kumaraswamy Adepu , Jain Mukesh , Kurva Ramesh , Vipin Lisha

Identyfikatory

DOI

10.22211/cejem/169024

• Języki publikacji: EN

Abstrakty

EN

Hydroxyl-terminated polybutadiene (HTPB) based composite propellants possess viscoelastic behaviour and hence time and temperature dependent mechanical properties. The mathematical analysis of viscoelastic behaviour of composite propellants becomes complex due to the non-linearity involved under various loading conditions. In the present study, a linear viscoelasticity assumption was considered to simulate stresses related to storage conditions. In this paper, a study of stress relaxation behaviour of composite propellants was carried out using the Generalized Maxwell model to obtain the material viscoelastic characteristics. The relaxation behaviour of composite propellants having solid loading varying from 85% to 89% were studied at different temperatures, from -27 to +32 °C, using a Dynamic Mechanical Analyser (DMA). The generated relaxation curves were curve fitted using MATLAB (R2022a) with the Generalized Maxwell model. The simulation demonstrated that a maximum of four elemental parameters of the Generalized Maxwell model are sufficient and can represent a best fit of the relaxation behaviour of the studied composite propellants. The equilibrium modulus was also evaluated at different temperatures, along with other material constants that are essential parameters for performing the structure integrity analysis of a solid propellant rocket motor. It was observed that the equilibrium modulus decreases with an increase in temperature, but increases with an increase in solid loading in the propellant composition formulations.

Słowa kluczowe

EN

composite propellant; viscoelastic; stress relaxation; DMA; temperature; equilibrium modulus

• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2023
• Tom: Vol. 20, no. 2
• Strony: 221--235
• Opis fizyczny: Bibliogr. 16 poz., rys., tab., wykr.

Twórcy

autor

Bihari Bipin Kumar

• High Energy Materials Research Laboratory, DRDO, Sutarwadi, Pune-411021, India

autor

Kumaraswamy Adepu

• Defence Institute of Advanced Technology, Girinagar, Pune-411025, India

autor

Jain Mukesh

• High Energy Materials Research Laboratory, DRDO, Sutarwadi, Pune-411021, India

autor

Kurva Ramesh

• High Energy Materials Research Laboratory, DRDO, Sutarwadi, Pune-411021, India

autor

Vipin Lisha

• High Energy Materials Research Laboratory, DRDO, Sutarwadi, Pune-411021, India

Bibliografia

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