Research on mechanical behavior of particle/matrix interface in composite solid propellant

• Published in: European journal of mechanics, A, Solids A, Solids, 2025-01, Vol.109, p.105498, Article 105498
• Main Authors: Zou, Zijie, Qiang, Hongfu, Zhang, Fengtao, Wang, Xueren, Li, Yiyi
• Format: Article
• Language: English
• Subjects: Cohesive constitutive model; Composite solid propellant; Dewetting damage; Mechanical behavior; Particle/matrix interface
• ISSN: 0997-7538
• DOI: 10.1016/j.euromechsol.2024.105498

In the mesostructure of composite solid propellant, the interface formed between solid particle and matrix is a region with very special physical and chemical properties, and the mechanical behavior of the interface will directly affect the mechanical properties of the propellant. This article derived a viscoelastic cohesive constitutive model to describe the mechanical behavior of the interface. subsequently a particle/matrix interface specimen was design to measure the interface mechanical properties under different conditions. To this end, the parameters of the constitutive model were solved through a combination of experimental data fitting and inversion. It was found that the interface behavior exhibits strong rate and temperature correlations, and the cohesive constitutive model can effectively describe this characteristic. •Proposed an experimental method for particle/matrix interface mechanical properties.•Analyzed the mechanical behavior of the particle/matrix interface.•Constructed a new viscoelastic cohesive constitutive model.