Modeling for Detonation and Energy Release from
Peroxides and Non-Ideal Improvised Explosives


Matthew Anthony PRICE and Ang How GHEE
Energetics Research Institute,
Nanyang Technological University, Singapore

Abstract: This work focuses on the development of models for predicting explosive
power and air blast from the detonation of organic peroxides (TATP and HMTD)
and non-ideal explosives involving ammonium nitrate, urea nitrate, and chlorates.
CHEETAH calculations assuming ideal behaviour are in agreement with literature
data for peroxides. However, the detonation behaviour of non-ideal explosives is
dependent on charge size and confnement. This behaviour is investigated using
thermo-chemical calculations with Kinetic CHEETAH, and reactive fow models
with AUTODYN. A simplifed ignition and growth (I&G) model was calibrated
using experimental charge diameter vs. VoD data. I&G models are used to predict
the front curvature, reaction zone structure, and energy release from the non-ideal
explosives. Detonation and air blast predictions for peroxides and unconfned and
confned (paper, plastic, steel) non-ideal charges are presented.

Keywords: improvised explosive, non-ideal, reactive flow, ANFO,