Abstract
The present work provides a theoretical and computational framework for modeling the macroscopic/microscopic behavior and interfacial decohesion of grains during propellant loading. The micro-scale is characterized by a unit cell, which contains micro-constituents (grains) dispersed in a polymeric blend. We have used a packing algorithm, treating the ammonium Perchlorate (AP) as spheres or discs, which enables us to generate packs which match the size distribution and volume fraction of actual propellants. Then a novel technique to characterize the pack geometry suitable for meshing is described and a powerful mesh generator is employed to obtain high quality periodic meshes with refinement zones in the regions of interest. The proposed numerical multiscale framework, based on the mathematical theory of homogenization, is capable of predicting non-homogeneous microfields and damage nucleation and propagation along the particle matrix interface, as well as the macroscopic response and mechanical properties of the damaged continuum. Examples are considered involving simple unit cells in order to illustrate the multiscale algorithm and demonstrate the complexity of the underlying physical processes.
| Original language | English (US) |
|---|---|
| State | Published - Dec 1 2005 |
| Event | 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit - Tucson, AZ, United States Duration: Jul 10 2005 → Jul 13 2005 |
Other
| Other | 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit |
|---|---|
| Country | United States |
| City | Tucson, AZ |
| Period | 7/10/05 → 7/13/05 |
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ASJC Scopus subject areas
- Aerospace Engineering
- Control and Systems Engineering
- Electrical and Electronic Engineering
Cite this
Multiscale damage modeling of solid propellants : Theory and computational framework. / Matous, Karel; Inglis, Helen M.; Gu, Xiaofang; Jackson, Thomas L.; Rypl, Daniel; Geubelle, Philippe H.
2005. Paper presented at 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Tucson, AZ, United States.Research output: Contribution to conference › Paper
}
TY - CONF
T1 - Multiscale damage modeling of solid propellants
T2 - Theory and computational framework
AU - Matous, Karel
AU - Inglis, Helen M.
AU - Gu, Xiaofang
AU - Jackson, Thomas L.
AU - Rypl, Daniel
AU - Geubelle, Philippe H
PY - 2005/12/1
Y1 - 2005/12/1
N2 - The present work provides a theoretical and computational framework for modeling the macroscopic/microscopic behavior and interfacial decohesion of grains during propellant loading. The micro-scale is characterized by a unit cell, which contains micro-constituents (grains) dispersed in a polymeric blend. We have used a packing algorithm, treating the ammonium Perchlorate (AP) as spheres or discs, which enables us to generate packs which match the size distribution and volume fraction of actual propellants. Then a novel technique to characterize the pack geometry suitable for meshing is described and a powerful mesh generator is employed to obtain high quality periodic meshes with refinement zones in the regions of interest. The proposed numerical multiscale framework, based on the mathematical theory of homogenization, is capable of predicting non-homogeneous microfields and damage nucleation and propagation along the particle matrix interface, as well as the macroscopic response and mechanical properties of the damaged continuum. Examples are considered involving simple unit cells in order to illustrate the multiscale algorithm and demonstrate the complexity of the underlying physical processes.
AB - The present work provides a theoretical and computational framework for modeling the macroscopic/microscopic behavior and interfacial decohesion of grains during propellant loading. The micro-scale is characterized by a unit cell, which contains micro-constituents (grains) dispersed in a polymeric blend. We have used a packing algorithm, treating the ammonium Perchlorate (AP) as spheres or discs, which enables us to generate packs which match the size distribution and volume fraction of actual propellants. Then a novel technique to characterize the pack geometry suitable for meshing is described and a powerful mesh generator is employed to obtain high quality periodic meshes with refinement zones in the regions of interest. The proposed numerical multiscale framework, based on the mathematical theory of homogenization, is capable of predicting non-homogeneous microfields and damage nucleation and propagation along the particle matrix interface, as well as the macroscopic response and mechanical properties of the damaged continuum. Examples are considered involving simple unit cells in order to illustrate the multiscale algorithm and demonstrate the complexity of the underlying physical processes.
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M3 - Paper
AN - SCOPUS:77957841217
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