Authors
K Matouš, HM Inglis, X Gu, D Rypl, TL Jackson, Philippe H Geubelle
Publication date
2007/6/1
Journal
Composites science and technology
Volume
67
Issue
7-8
Pages
1694-1708
Publisher
Elsevier
Description
We present a theoretical and computational framework for modeling the multiscale constitutive behavior of highly filled elastomers, such as solid propellants and other energetic materials. Special emphasis is placed on the effect of the particle debonding or dewetting process taking place at the microscale and on the macroscopic constitutive response. The microscale is characterized by a periodic unit cell, which contains a set of hard particles (such as ammonium perchlorate for AP-based propellants) dispersed in an elastomeric binder. The unit cell is created using a packing algorithm that treats the particles as spheres or discs, enabling us to generate packs which match the size distribution and volume fraction of actual propellants. A novel technique is introduced to characterize the pack geometry in a way suitable for meshing, allowing for the creation of high-quality periodic meshes with refinement zones in the …
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K Matouš, HM Inglis, X Gu, D Rypl, TL Jackson… - Composites science and technology, 2007