Thermomechanical modeling of regressing heterogeneous solid propellants

K. R. Srinivasan, K. Matouš, P. H. Geubelle, T. L. Jackson

Research output: Contribution to journalArticlepeer-review

Abstract

A numerical framework based on the generalized finite element method (GFEM) is developed to capture the coupled effects of thermomechanical deformations and thermal gradients on the regression rate of a heterogeneous solid propellant. The thermomechanical formulation is based on a multiplicative split of the deformation gradient and regression of the heterogeneous solid propellant is simulated using the level set method. A spatial mesh convergence study is performed on a non-regressing solid heterogeneous propellant system to examine the consistency of the coupled thermomechanical GFEM solver. The overall accuracy (spatial and temporal) of the coupled thermomechanical solver for regressing solid propellants is obtained from a periodic sandwich propellant configuration, where the effects of thermomechanical deformations on its regression rate is investigated. Finally, the effects of thermomechanical deformations in a regressing two-dimensional heterogeneous propellant pack are studied and time-average regression rates are reported.

Original languageEnglish (US)
Pages (from-to)7883-7901
Number of pages19
JournalJournal of Computational Physics
Volume228
Issue number21
DOIs
StatePublished - Nov 20 2009

Keywords

  • Bimaterial incompressible hyperelastic solids
  • Generalized mixed finite element method
  • Heterogeneous solid propellants
  • Lagrange multipliers
  • Thermomechanical model

ASJC Scopus subject areas

  • Numerical Analysis
  • Modeling and Simulation
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)
  • Computer Science Applications
  • Computational Mathematics
  • Applied Mathematics

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