Modelling and characterization of the performance of metallized explosives
Publish date: 2019-12-16
Report number: FOI-R--4831--SE
Pages: 24
Written in: Swedish
Keywords:
- afterburn
- metallized high explosives
- non-ideal explosives
- performance
- simulation
- underwater detonation
Abstract
The report describes research activities on metallized high explosives with special emphasis on work done during 2017-2019. The work aims, among other things, to improve the ability to evaluate contemporary and future weapons systems. During the detonation of metallized explosives, the energy is often released over a longer time scale, which is advantageous in specific applications, e.g. enhanced blast explosives, thermobaric and fragmenting warheads and underwater weapons. In order to model unconfined charges detonating in air FOI employs a model with high level of physical detail based on computational fluid dynamics. For confined charges, a phenomenological model is employed in the context of hydrocode simulation. Working towards a method to calibrate this model, three types of experiments have been evaluated, i.e. the disc acceleration experiment, cylinder expansion tests and underwater performance tests. The report summarizes the experiments and discusses how the results in conjunction with thermochemical calculations can be used to calibrate models for the detonation of metallized high explosives.