Defects Causes, Classification & Criticality IMEMTS 2019, - - PowerPoint PPT Presentation

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Feb 11, 2023 110 likes •255 views

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

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Supporting Munitions Safety

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Defects – Causes, Classification & Criticality

Dr Michael SHARP MSIAC Project Manager m.sharp@msiac.nato.int Matt FERRAN (MSIAC) Dr Kevin JAANSALU (MSIAC) Dr Matthew ANDREWS (MSIAC)

IMEMTS 2019, Seville, Spain

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Supporting Munitions Safety

The Problem

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Supporting Munitions Safety

Defects Workshop 2020

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Defects – Causes, Classification and Criticality 15th – 19th June 2020 The Hague, The Netherlands

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Supporting Munitions Safety

Workshop Goal

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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

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Supporting Munitions Safety

Workshop Structure

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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

Focus Areas

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Supporting Munitions Safety

Preliminary Activities

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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

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Supporting Munitions Safety

Model for Classifying Material Performance

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Supporting Munitions Safety

Defect Lexicon and Taxonomy

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MSIAC staff have compiled a

lexicon of defect terms from the literature

Terms accompanied by:
Definition
Image (where possible)
Family (explosives, propellants
r pyrotechnics)
Size (nm-µm, µm-cm, cm-m)
Location (bulk, interface,

surface)

Time (processing, integration,

ageing)

https://www.msiac.nato.int/defect-lexicon- questionnaire

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Supporting Munitions Safety

Defect Lexicon and Taxonomy

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Identified need to classify defects terms into like groups
Taxonomy based on materials tetrahedron:
Synthesis and Processing
Composition and Structure
Properties

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Supporting Munitions Safety

Bulk defect Crystal Bulk defect Occluded Solvent Dislocation Inclusion Porosity (intra) Cracks (micro) Twinned crystal Pores Vacuole Void and cavity (Inter) porosity Bubbles Foam Wormhole Blowhole Piping Cavern Fissure

Composition and Structure

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Supporting Munitions Safety

How to Get Involved

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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

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Supporting Munitions Safety

Defects Workshop 2020

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Questions?

www.msiac.nato.int/defects

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Supporting Munitions Safety

Defects Workshop 2020

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Questions?

www.msiac.nato.int/defects

Location: Crowne Plaza Den Haag Promenade Hotel