A Micromechanical Model for Debonding Process in Composite Solid Propellants

Abstract:

The random distribution packing models of particles in the binder of solid propellant were generated based on the Molecular Dynamics method. The generated packing models were then analyzed by finite element method combined with the analytical method. A cohesive interface model was incorporated to capture the debonding process taking place along particles binder interface. The results show that the FEM analyses with cohesive interface can predict the complex heterogeneous stress and strain fields and the progress of debonding of particles from binder. Particles interaction significantly influences the interfacial damage evolution of propellant.

• Periodical: Applied Mechanics and Materials (Volumes 148-149)
• Pages: 1107-1112
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.148-149.1107
• Online since: December 2011
• Authors: Gao Chun Li, Yu Feng Wang, Ai Min Jiang, Xiang Yi Liu
• Keywords: Interfacial Debonding, Micromechanical Modeling, Packing Models, Solid Propellant

References

[1] Ha K, Schapery R A. A three-dimensional viscoelastic constitutive model for particulate composites with growing damage and its experimental validation. International Journal of Solid and Structures. Vol. 35, No. 26, 1998: 3497-3517.

DOI: 10.1016/s0020-7683(97)00213-8

[2] Hinterhoelzl R M, Schapery R A. FEM Implementation of a Three-Dimensional Viscoelastic Constitutive model for Particulate Composites with Damage Growth. Mechanics of Time-Dependent Materials. 8, 2004: 65-94.

DOI: 10.1023/b:mtdm.0000027683.06097.76

[3] Ozupek S. Constitutive Equations For Solid Propellants. The University of Texas at Austin. (1997).

[4] Zhong A X, Knauss W G. Analysis of interfacial failure in particle-filled elastomers. Journal of Engineering Materials and Technology. 119, 1997: 198-204.

DOI: 10.1115/1.2812243

[5] Matous K et. al, Multiscale damage modeling of solid propellant: theory and computational framework. AIAA 2005-4347.

[6] Matous K, Geubelle P H. Multiscale modeling of particle debonding in reinforced elastomers subjected to finite deformations. International Journal for Numerical Methods in Engineering. 65, 2006: 190-223.

DOI: 10.1002/nme.1446

[7] Knot G. M et al. Random Packing of Heterogeneous Propellants. AIAA Journal, Vol. 39, No. 4, 2001: 678-686.

[8] Kochevets S V. Random Sphere Packing Model of Heterogeneous Propellants. The University of Illinois at Urbana-Champaign, (2002).

[9] IDE K.M., HO S.Y. Fracture behavior of accelerated aged solid rocket propellants. Journal of Material Science. 34, 1999: 4209-4218.