Explosive Science - Advanced

Course aim:

This five-day course will equip the students with a comprehensive view of Explosive Materials and provide participants with an introduction to chemistry and its application to detonable material systems. Mechanisms of deflagration and detonation as well as the effects of explosive blast will also be explored.

Attendees will receive a comprehensive set of notes covering the lecture content.

Who should attend?

Anyone who is working in the mining and defence sectors where explosive substances are used including (and not limited to): design engineers; material scientists; systems engineers; project managers; serving officers; end-users and business managers. This course is technical and therefore a related technical qualification in a tertiary establishment is desirable to get the most out of the content.

Course outline:

DAY 1

Introduction to explosives (2 hours)

Historical perspectives | Basic chemical and physical concepts for explosives and explosions.

Chemical reactions and explosive behaviour (1 hour)

Introduction to chemical reactions |Ignition, Stability and Reactivity | Energy from chemical reactions

Thermochemistry of explosives (2 hour)

Explosive reactions | Oxygen balance 

Tutorial (1 hour)

A session will be provided so that the student can work through some of the issues raised in this course under the guidance of the course presenter.

 

DAY 2

Classification and performance and type of explosives (3 hours)

Classification of explosives | Performance parameters | Energised explosives | Initiation and propagation of explosive reactions | Explosive trains

Introduction to Combustion, Deflagration and Detonation (2 hours)

Physical and chemical aspects of combustion | Deflagration | Detonation | Detonation Waves | Nature of Detonation waves | Introduction to Shock waves

Tutorial (1 hour)

A session will be provided so that the student can work through some of the issues raised in this course under the guidance of the course presenter.

 

DAY 3

Explosive materials and manufacture (1 hour)

Overview of some specific explosive materials| Applications | Aspects of manufacturing | Future developments

Insensitive munition design (1 hour)

System approaches | Shock mitigation methods | Chemistry of insensitive munition design

Introduction to Blast (2 hours)

Nature of Blast | Effects of blast on people and structures | Engineering principles to protect building occupants from blast | Case studies

Tutorial (Blast Calculations) – 2 hours

Introduction to Kingery-Bulmash calculations | Worked examples will be presented and discussed and students given the opportunity to do their own calculations

 

DAY 4

Introduction to Shock Wave Theory (2 hours)

Introduction to waves | Calculation of the particle velocity | Elastic waves |Inelastic waves | Shock waves | Rankine-Hugoniot equations | Impedance matching | Calculating the pressure due to collisions | Experimental techniques | Calculations

Detonics (2 hours)

Hot spot mechanisms | Homogeneous detonation | Shock-to-Detonation | Deflagration-to-Detonation | Chapman-Jouget theory | ZND Theory | Equations of State

Tutorial on Shock wave theory (2 hours)

Introduction to calculation of pressures, temperatures and densities when a substance has been shocked.

 

DAY 5

Computational modelling (2 Hours)

Introduction to computer codes including hydrocodes | Discretisation | Empirical vs analytical vs computational | Equations of state | Strength models | Failure models |Erosion models | Modelling explosions and explosive effects.

Explosive material models (2 Hours)

An introduction to concepts for material modelling | Ideal Gas | Jones-Wilkins-Lee | Lee-Tarver | Powder Burn models

Case studies in computational modelling in ANSYS AUTODYN (2 Hours)

Pitfalls | Single Mousetrap modelling | Projectile impact modelling | The Gap Test | Zero Gap Test (C4 and TNT) |

 

Course Leaning Objectives:

At the end of this course, the student will be able to:

LO1 Explain basic chemical principles relevant to explosives science, including stoichiometry, chemical bonding, intermolecular forces, thermochemistry and reaction kinetics (including detonation vs deflagration);

LO2 Discuss the differences between types of explosives;

LO3 Explain the application for each type of explosive and show how each type can be used in an explosive train;

LO4 Discuss IM-compliant munitions;

LO5 Explain the different types of stimuli that will lead to detonation of an explosive;

LO6 Explain the way a detonation evolves within the explosive composition and how these waves are sustained;

LO7 Describe shock-wave theory (including equations-of-state); Rankine-Hugoniot theory and C-J theory.


Presenters:

Paul J Hazell

Paul has over 20 years of experience studying the impact behaviour of materials and explosive engineering. In 2012 he moved to Canberra, Australia from the UK to take up the post of Professor of Impact Dynamics at UNSW Canberra. Before taking this position he was Head of the Centre for Ordnance Science and Technology at Cranfield University’s Shrivenham campus (at the UK Defence Academy). He has published extensively, appeared in several documentaries and presented his research work at numerous symposia. He has published two books on protection technologies with the most recent called ‘ARMOUR: Materials, Theory, and Design’ (CRC Press, 2015).

Adrian Garrido Sanchis

Dr. Adrian Garrido Sanchis is a Chemical Engineer that works as an Associate Lecturer at UNSW School of Science, in Canberra, where he lectures chemical and biological weapons and explosives. He specializes on developing new technologies for explosive detection and the purification and sterilization of wastewater from bench to commercial scale applications. He has pioneered the development of a novel sterilization process, which has been adopted by Australian Pork Limited (APL), who have recently funded his research and have funded the development and construction of a small scale water treatment pilot unit which has been trialled at a piggeries water treatment plant in NSW. He submitted a provisional patent application via UNSW to seek protection for this new process.

Adrian has substantial experience in commercial R&D and a unique range of abilities and skill set in water treatment and automation/environmental monitoring through IoT devices.

 

 

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