ColoradoSchoolofMines,Golden,Colorado,USAMarch,2018

Experimental techniques for ultra-high-velocity impact

Introduction This 3.5 days long course offers participants the opportunity to develop a fundamental knowledge of the principles of ultra-high-velocity impact and the current experimental techniques for capturing such phenomena. The course will overview the ballistic theory and impact; metallurgical observations and energy partitioning; and engineering considerations in the hypervelocity regime. In addition, participants will gain an understanding of the various high speed imaging techniques with different types of cameras, as well as advanced experimental techniques such as flash x-rays and stereoscopy. The course will include laboratory demonstrations, industry expert guest lectures, and hands-on practical exercises.

Proposed Outline Day 1: Fundamental Principles in Ultra High-Velocity Impact (Tuesday)

• Introduction and Welcome• Explosives Materials Detonation and Shock Wave • Introduction to High-Velocity Accelerators• Ballistic theory• Theory of Impact and Stress Wave Propagation in Solids• Metallurgical Observations and Energy Partitioning• Networking Meeting at Hill hall 300 (food and drinks will be served)

Day 2: Selected Experimental Techniques (Wednesday)• Introduction to Ultra-High-Speed Imaging• Selection of Lenses• Lighting and Lasers• Camera Triggering and Synchronization• Safety training for Small Scale Blast Chamber (SSBC)• Classroom hands-on 1-5 Experiments• Introduction to Flash X-Rays (optional)

Day 3: Safety Training and Large Scale Laboratory Experiments (Thursday)• Safety Training/Safety Quiz for ERL• Laboratory Experiments 1-10• Data evaluation of impact phenomena

Day 4: Data Analysis and Certificates (Friday)• Group projects and Q&A: data analysis and report writing• Final Presentations & Q&A• Certificates

Laboratory ExperimentsHigh Velocity Accelerators:

– Guns– Shaped Charges– Explosively Formed Penetrators (EFPs)

Experimental Techniques:– Ultra-high Speed Imaging– High-speed Imaging– Flash X-Rays

Experimentalsetupexample Hypervelocityimpactfromshaped chargejet

Shapedcharge(top)vsEFP(bottom)

Large Scale Laboratory ExperimentsExperiment 1: Bullet impact

– Bullet impact using high speed camera (v ~ 1,000 m/s)

Experiment 2: Shaped charge– Jet impact and penetration using Flash X-Rays (optional) (v ~ 6,000 m/s)

Experiment 3: Explosively Formed Penetrator– Slug impact using ultra-high speed imaging (v ~ 2,000 m/s)

AXPROExplosivesResearchLaboratory(ERL)atIdahoSprings, CO.Upto80lb openairdetonation

Small-Scale Laboratory Experimentsat the Classroom and Blasting Chamber

Experiment 1: Bullet impact– Bullet impact using high speed camera (v ~ 1,000 m/s)

Experiment 2: Shaped charge– Jet impact and penetration in aquarium

AXPROSmall-ScaleBlastChamber(SSBC)atGolden,CO.Upto20grdetonation