A micromechanics model is developed to predict the effective thermo-mechanical properties of energetic materials, which are composite materials made from agglomeration of particles of a range of sizes. A random packing algorithm is implemented to construct a representative volume element for the heterogeneous material based on the experimentally determined particle diameter distribution. The effective mechanical properties of the material are then evaluated through finite element modeling, while its thermal properties are determined through a finite volume approach. The model is first carefully validated against results from the literature and is then used to estimate the thermo-mechanical properties of particular energetic materials. Good agreement is found between experimental results and predictions. The stress-bridging phenomenon in the particulate materials is captured by the model. Thermodynamic averaging is shown to be a poor representation for the estimation of thermal properties of these heterogeneous materials. Also, the general elastic-plastic assumption is found not to be applicable for describing the mechanical behavior of energetic composites.
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ASME 2006 International Mechanical Engineering Congress and
Exposition
November 5–10, 2006
Chicago, Illinois, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
0-7918-4785-3
PROCEEDINGS PAPER
Prediction of Effective Thermo-Mechanical Properties of Particulate Composites Available to Purchase
S. Ravi Annapragada,
S. Ravi Annapragada
Purdue University
Search for other works by this author on:
Suresh V. Garimella
Suresh V. Garimella
Purdue University
Search for other works by this author on:
S. Ravi Annapragada
Purdue University
Dawei Sun
Purdue University
Suresh V. Garimella
Purdue University
Paper No:
IMECE2006-14720, pp. 593-602; 10 pages
Published Online:
December 14, 2007
Citation
Annapragada, SR, Sun, D, & Garimella, SV. "Prediction of Effective Thermo-Mechanical Properties of Particulate Composites." Proceedings of the ASME 2006 International Mechanical Engineering Congress and Exposition. Heat Transfer, Volume 2. Chicago, Illinois, USA. November 5–10, 2006. pp. 593-602. ASME. https://doi.org/10.1115/IMECE2006-14720
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