Multiscale modeling of heterogeneous propellants from particle packing to grain failure using a surface-based cohesive approach

Sun, Bing; Zhang, Jianwei

doi:10.1007/s10409-012-0058-y

Cited by 21 publications

(11 citation statements)

References 26 publications

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“…The effect of thickness and inhomogeneity of ITZ on the effective mechanical properties are studied for the realistic demand by following numerical examples. The experimental results and theoretical models indicate that inclusion volume fraction and matrix modulus are key factors controlling the effective mechanical properties [21,23]. In Figs.…”

Section: Numerical Proceduresmentioning

confidence: 88%

Effect of the Interfacial Transition Zone on Basic Mechanical Properties of a Solid Composite Propellant

Shen

Cui

et al. 2018

Strength Mater

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The evaluation of basic mechanical properties are shown to be of importance for the solid composite propellant development and application. The numerical analysis approach termed the three-phase Voronoi cell finite element method, was proposed to evaluate of the interfacial transition zone effect. Numerical results showed that the performance of the effective modulus could be essentially enhanced by increasing the zone thickness. The module of the composite with the inhomogeneous zone was higher than that of the composite with the homogeneous one. The effect of different zones on volume fractions and matrix moduli was also calculated. The Voronoi method can also be helpful for analyzing the characteristic properties of other three-phase composites.

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Section: Numerical Proceduresmentioning

confidence: 88%

Effect of the Interfacial Transition Zone on Basic Mechanical Properties of a Solid Composite Propellant

Shen

Cui

et al. 2018

Strength Mater

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“…However, while considering the dewetting phenomenon in composites, those analytical models are limited to capturing the real strain and stress distribution which is of great importance during the analysis. RVE is wildly used to predict the effective properties of the composites accompanied with the FE analysis, especially for solid propellants [23][24][25][26][27]. In the published literature, there are different definitions of it.…”

Section: Preparations Of the Rve Modelmentioning

confidence: 99%

Investigation on Viscoelastic Poisson’s Ratio of Composite Materials considering the Effects of Dewetting

Cui

Wei-li

Lv³

et al. 2022

International Journal of Aerospace Engineering

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A direct numerical method is introduced herein to investigate time-dependent Poisson’s ratio of solid propellant based on a representative volume element (RVE) model. Time-dependent longitudinal and transverse strains are considered in the calculation of time-dependent Poisson’s ratio under the relaxation test. The molecular dynamics (MD) packing algorithm is used to generate the high area fraction RVE model of solid propellants consisting of ammonium perchlorate (AP) particles whose radius follows lognormal distribution. In order to simulate the dewetting response of the interface between particles and matrix, the PPR model is modified and utilized during the analysis. Time-dependent Poisson’s ratio is measured under different cohesive parameters, loading conditions (loading temperature, loading rate, and fixed strain), and area fraction. Numerical results reveal that time-dependent Poisson’s ratio can be nonmonotonic or monotonic according to the different cohesive parameters. A concept of critical cohesive parameters is proposed to judge whether the monotonic property of time-dependent Poisson’s ratio appears or not. According to the numerical analysis, the cohesive contact and the shrinkage of the bulk element are two main factors which will control the change of monotonic property. All time-dependent Poisson’s ratios will increase at the beginning of the relaxation stage because the effects of cohesive contact can be ignored compared with the large shrinkage of the bulk element. However, with the increased shrinkage of the bulk element, the increased cohesive contact will defend further shrinkage at the same time. Although the shrink of the bulk element never changes its direction, the ratio of the transverse strain to longitudinal strain may decrease or keep increasing in this stage. When transverse and longitudinal strains stop to change, all time-dependent Poisson’s ratios will achieve their equilibrium values.

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“…They studied the interface debonding process of propellant and its influence on macro mechanical response through finite element calculation. An approximate characterization of the mechanical response of propellant particle/matrix interface by bilinear cohesion model was carried out by Zhi [11]. It was found that the initial modulus and tensile strength of propellant increased with the increase of the filling volume fraction.…”

Section: Introductionmentioning

confidence: 99%

Effect of Microstructure on Micro-Mechanical Properties of Composite Solid Propellant

Han

et al. 2021

Micromachines

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This study was aimed at determining the effect of microstructure on the macro-mechanical behavior of a composite solid propellant. The microstructure model of a composite solid propellant was generated using molecular dynamics algorithm. The correlation of how microstructural mechanical properties and the effect of initial interface defects in propellant act on the macro-mechanics were studied. Results of this study showed that the mechanical properties of propellant rely heavily on its mesoscopic structure. The grain filling volume fraction mainly influences the propellant initial modulus, the higher the volume fraction, the higher initial modulus. Additionally, it was found that the ratio of particles influences the tensile strength and breaking elongation rate of the propellant. The big particles could also improve the initial modulus of a propellant, but decrease its tensile strength and breaking elongation rate. Furthermore, the initial defects lowered the uniaxial tensile modulus, tensile strength, and the relaxation modulus of propellant, but did not affect the relaxation behavior of the propellant.

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Multiscale modeling of heterogeneous propellants from particle packing to grain failure using a surface-based cohesive approach

Cited by 21 publications

References 26 publications

Effect of the Interfacial Transition Zone on Basic Mechanical Properties of a Solid Composite Propellant

Effect of the Interfacial Transition Zone on Basic Mechanical Properties of a Solid Composite Propellant

Investigation on Viscoelastic Poisson’s Ratio of Composite Materials considering the Effects of Dewetting

Effect of Microstructure on Micro-Mechanical Properties of Composite Solid Propellant

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