About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
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Presentation Title |
Experimental Measurements of Anisotropic Mechanical Behavior of 𝛽-HMX Crystals |
Author(s) |
Ayotomi Olokun, Abhijeet Dhiman, Vikas Tomar |
On-Site Speaker (Planned) |
Ayotomi Olokun |
Abstract Scope |
Due to their complex microstructure, energetic materials (EMs) are known to be sensitive to mechanical and thermal stimuli, which may lead to sudden localized temperature rise resulting in unintentional detonation. With few exceptions, simulation of the mechanical behavior of HMX-based EMs in the mesoscale generally overlooks the anisotropic thermomechanical properties of HMX crystals which can be vital in determining the performance of HMX-based EMs. In this work, we obtained elastic and viscoplastic constitutive parameters for modelling the mechanical behavior of the (010), {110}, and {011} oriented faces of 𝛽-HMX. Elastic constitutive parameters are obtained via nanoindentation experiments on HMX crystals and HMX-based Polymer Bonded Explosives (PBX). Similarly, dynamic impact is performed to characterize the anisotropic viscoplastic model parameters to fit a viscoplastic power law. Using these parameters, we capture defining anisotropic constitutive properties of HMX for high accuracy in prediction of thermomechanical behavior and sensitivity of HMX-based EMs. |
Proceedings Inclusion? |
Planned: |