Effective Mechanical Property Estimation of Composite Solid Propellants Based on VCFEM

Abstract

A solid rocket motor is one of the critical components of solid missiles, and its life and reliability mostly depend on the mechanical behavior of a composite solid propellant (CSP). Effective mechanical properties are critical material constants to analyze the structural integrity of propellant grain. They are estimated by a numerical method that combines the Voronoi cell finite element method (VCFEM) and the homogenization method in the present paper. The correctness of this combined method has been validated by comparing with a standard finite element method and conventional theoretical models. The effective modulus and the effective Poisson’s ratio of a CSP varying with volume fraction and component material properties are estimated. The result indicates that the variations of the volume fraction of inclusions and the properties of the matrix have obvious influences on the effective mechanical properties of a CSP. The microscopic numerical analysis method proposed in this paper can also be used to provide references for the design and the analysis of other large volume fraction composite materials.

Review on the Dewetting of the Particle‐Matrix Interface in Composite Solid Propellants

“…Shen et al. adopted an improved multi‐directional settlement algorithm, developed a random release algorithm for the geometric simulation model of multi‐stage particle filling RVE with high particle content, and studied a Voronoi grid generation method suitable for VCFEM analysis [84, 85]. Peng et al.…”

“…sis [84,85]. Peng et al calculated the stress distribution at the particle interface and in the matrix of composite solid propellant by using the cylindrical group cell axisymmetric viscoelastic finite element model, and analyzed that the dewetting damage between particles and the interface is the main damage form of composite solid propellant [86].…”

Correlation of design parameters of lattice structure for highly tunable passive vibration isolator

“…Lattice structure has high potential as a promising substitute to the foam or honeycomb structures commonly used currently (Ling et al, 2019). Additionally, the lattice structure can have high effective mechanical properties and good energy absorbance capabilities making it perfect for lightweight load-bearing structural applications (Deshpande et al, 2001a; Feng et al, 2019; Fleck et al, 2010; Hualin and Wei, 2006; Park et al, 2014; Shen et al, 2018; Maskery et al, 2017; Roberts and Garboczi, 2002; Vigliotti and Pasini, 2012). Most engineering structures such as machines, cars, and aircraft vibrate especially when involving high stiffness lightweight structures (Junyi and Balint, 2016).…”