Maxwell Institute for Mathematical Sciences

Models for Energetic Materials 2021

10 - 11 May, 2021
Heriot-Watt University and Maxwell Institute for Mathematical Sciences, Edinburgh

The workshop was held virtually on Zoom.

Speakers: Ernest Baker (MSIAC / NATO)
(click on name Maria Charalambides (Imperial College London)
for their slides)Malcolm Cook (Syanco Ltd.)
John Curtis (AWE and University College London)
Didier Picart (CEA DAM Le Ripault)
Jack Reaugh (Lawrence Livermore National Laboratory)
Kieran Quaine (Heriot-Watt)
Sally Said (University College London)
Frank Smith (University College London)
David Torkington (Heriot-Watt)
organised by: Heiko Gimperlein
Andrew Lacey
John Curtis
Schedule and Abstracts
Safety is paramount in the handling and storage of explosives. There is a long and sad history of serious accidents that have resulted from both mechanical and thermal abnormal and unexpected loadings of diverse severities. The high cost and danger of experimentation has necessitated modelling of scenarios of potential danger. The great flexibility and power of hydrocode packages implementing finite element and difference methods has made their use the natural choice to address this need. However, the use of these codes has often revealed that localised effects arise that are hard to resolve with standard computation meshes; often shear bands or local regions of extreme heating are observed. Sometimes the use of very fine meshes and small time-steps can overcome the issue, often at high computational cost and long run-times. The question thus arises: could mathematical modelling, its experimental validation and modern numerical methods offer further advances in understanding to enable improvements to the hydrocodes both as regards accuracy and run-time? Following an initial European Study Group with Industry in 2011, AWE has sponsored a series of PhD projects engaging UK academics in problems addressing key mechanisms of shearing, pinching, cracking and severe heating of explosives and surrogate materials. This Workshop is designed to showcase the recent progress in this area in the UK and internationally. It will offer ample time for discussion and forging collaborations.

Envisaged topics include:
Pinch of Explosives and Related Materials, e.g. Surrogate Explosives
Shearing of Explosives and Related Materials
Burning of Explosives under Thermal Loadings
Thermal Runaway
Asymptotic Analysis of Explosives: Boundary Layers
Finite Element Methods: Enriched Elements, Adaptive Schemes, and any others
Studies with, and Applications of, Ignition Models for High Explosive Violent Reaction
Reaction Modelling
Experiments and their Relationship with Modelling
Influence of Meso-scale Composition on Explosive Properties and Response
Determination of Worst Case Thermal, Mechanical, or Combined Insult
Other modelling topics will be considered for inclusion

Previous events: Mathematical Modelling of Energetic Materials 2019