Supporting Munitions Safety Defects – Causes, Classification & Criticality IMEMTS 2019, Seville, Spain Dr Michael SHARP Matt FERRAN (MSIAC) MSIAC Project Manager Dr Kevin JAANSALU (MSIAC) m.sharp@msiac.nato.int Dr Matthew ANDREWS (MSIAC) 24/10/2019 1
The Problem Supporting Munitions Safety 24/10/2019 2
Defects Workshop 2020 Supporting Munitions Safety Defects – Causes, Classification and Criticality 15 th – 19 th June 2020 The Hague, The Netherlands 24/10/2019 3
Workshop Goal Supporting Munitions Safety To define the methodology by which the criticality of the materials factors leading to failure of munition systems can be assessed, and how this assessment can then be used to inform safety and capability related decisions. We must understand: • Defect types and how they are created • Techniques for detection and characterisation • Impact on S3 • Information required to support decisions 24/10/2019 4
Workshop Structure Supporting Munitions Safety 24/10/2019 5
Focus Areas Supporting Munitions Safety FA1: Origin • Identify typical defects by munition system / energetic material / LCEP etc. • Determine how defects are created, grow and change FA2: Detection • Identify best practice techniques for different defects / munition systems • Limitations, capability gaps and emerging technology FA3: Consequences • Identify safety hazards associated with defects • Identify methods to quantify the extent of hazards FA4: Criticality • Understand the point at which defects impact S3 24/10/2019 6
Preliminary Activities Supporting Munitions Safety • Review of techniques for the detection and characterisation of defects • Support to AC/326 SG/A efforts on gun launch setback loading • Development of a general model for classification of factors leading to the failure of munition systems • Collation and classification of known munition system defects and development of a defects lexicon and taxonomy 24/10/2019 7
Model for Classifying Material Performance Supporting Munitions Safety 24/10/2019 8
Defect Lexicon and Taxonomy Supporting Munitions Safety • MSIAC staff have compiled a lexicon of defect terms from the literature • Terms accompanied by: o Definition o Image (where possible) o Family (explosives, propellants or pyrotechnics) o Size (nm-µm, µm-cm, cm-m) o Location (bulk, interface, surface) o Time (processing, integration, https://www.msiac.nato.int/defect-lexicon- ageing) questionnaire 24/10/2019 9
Defect Lexicon and Taxonomy Supporting Munitions Safety • Identified need to classify defects terms into like groups • Taxonomy based on materials tetrahedron: o Synthesis and Processing o Composition and Structure o Properties 24/10/2019 10
Composition and Structure Supporting Munitions Safety Bulk defect Crystal Bulk Pores defect Occluded Dislocation Inclusion Porosity (intra) Cracks (micro) Twinned crystal Vacuole Void and cavity Solvent (Inter) porosity Bubbles Foam Wormhole Blowhole Piping Cavern Fissure 24/10/2019 11
How to Get Involved Supporting Munitions Safety • Session Chairs • Submission of technical papers for presentation at workshop • Defect lexicon survey • Inform interested parties • Attend For more information, to submit abstracts and to register interest in attending visit: www.msiac.nato.int/defects 24/10/2019 12
Defects Workshop 2020 Supporting Munitions Safety Questions? www.msiac.nato.int/defects 24/10/2019 13
Defects Workshop 2020 Supporting Munitions Safety Location: Crowne Plaza Den Haag Promenade Hotel Questions? www.msiac.nato.int/defects 24/10/2019 14
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