EML 4905 Ethics and Design Project Organization Department of
Mechanical and Materials Engineering Florida International
University
Slide 2
04/21/2015 US Air Force VHg Mark II Florida International
University Jason CampbellKenny CandelarioCinthya EnriquezMichael
Fisher
Slide 3
No Thermal controllability exists for test chamber VHG Mark I
is unsafe and inefficient. US Air Force VHg Mark II Florida
International University 04/21/2015
Slide 4
Cooling controllability -35C Ideal -25C Required Commercially
available components 2 thick material stack clearance US Air Force
VHg Mark II Florida International University 04/21/2015
Slide 5
Shock test results determine storage and transportation
procedures for munition components. Safety and efficiency require
major improvements Thermal conditions can impact reliability of
fuses. US Air Force VHg Mark II Florida International University
04/21/2015
Slide 6
Funded by Eglin Air Force Base Upgrade Very High-G Mark I.
Focus on Thermal Controllability, and Carriage Yoke upgrade. US Air
Force VHg Mark II Florida International University 04/21/2015
Slide 7
Portable tester that produces steel on steel impacts. Designed
and Manufactured in the years 1966 to 1968. Testing ordnance
components associated with Arming, fuzing and safing functions. US
Air Force VHg Mark II Florida International University
04/21/2015
Slide 8
US Air Force VHg Mark II Florida International University
04/21/2015
Slide 9
Deliver a peak shock of 80,000-100,000gs 5-10lb test specimen
40 microseconds test duration Recovery time less than 3 minutes 1/4
steel safety shield US Air Force VHg Mark II Florida International
University 04/21/2015
Slide 10
Austenitic Stainless Steels Great resistance to cryogenic
temperatures FCC > BCC Tightly packed particles US Air Force VHg
Mark II Florida International University 04/21/2015
Slide 11
Ranque Hilsch Tube Uses compressed air only No moving
components Not bulky Capable of extreme, cold temps Instant US Air
Force VHg Mark II Florida International University 04/21/2015
Slide 12
Non-Porous Resists Mold Frost Build Up (-182C to 104C) thick
R-Value = 3 US Air Force VHg Mark II Florida International
University Reduces heat transfer Prevents condensation Closed-cell
sheet insulation 04/21/2015
Slide 13
Methodology applied to Carriage Yoke upgrade Setup Reduction
External vs. Internal Tasks Flexibility of operations Pull-Type
Manufacturing offers control of variables US Air Force VHg Mark II
Florida International University 04/21/2015
Slide 14
The federal requirement for using compressed air OSHA -
1910.242; 1910.242(b); 1917.154 ASME EA-4-2010 Eye Safety OSHA -
1910.133 ANSI Z87.1 2010 US Air Force VHg Mark II Florida
International University 04/21/2015
Slide 15
US Air Force VHg Mark II Florida International University Scope
of the design Liquid Nitrogen available Material for
heating/cooling Principle behind heating coils Cycling liquid
through tubes Convective cooling From BeverageFactory.com 304
Stainless Steel 04/21/2015
Slide 16
US Air Force VHg Mark II Florida International University New
scope Only compressed gas available Nitrogen or Air Principle
behind air cans to freeze water Gas expansion chamber Pressurized
nitrogen through nozzle No moisture Possible use of Labyrinth
nozzle for lower cooling temps 04/21/2015
Slide 17
US Air Force VHg Mark II Florida International University
Re-Design to Lower Section of Yoke Pros: Less parts to be
re-designed Cons: Height Deficiency (2 Mat. Stack) Protruding
Fixture 04/21/2015
Slide 18
US Air Force VHg Mark II Florida International University
Re-Design to Upper & Lower Sections of Yoke Pros: Compact
Design Height Clearance Achieved Safety 1 min. Cycle Time Reduction
Cons: More parts to be re-designed 04/21/2015
Slide 19
US Air Force VHg Mark II Florida International University Shock
loads negligible to Carriage Yoke Weight load from Interior Chamber
Assembly Max. Von Mises Stress: 7.08 Mpa Yield Strength: 27.57 MPa
Max. Deflection: 0.021 mm Factor of Safety: 3.9 04/21/2015
Slide 20
US Air Force VHg Mark II Florida International University
04/21/2015
Slide 21
US Air Force VHg Mark II Florida International University 3D
Printed using PLA Top, bottom and material stack fixture Contracted
out to Make-It Studio Functional Model 04/21/2015
Slide 22
US Air Force VHg Mark II Florida International University
04/21/2015
Slide 23
US Air Force VHg Mark II Florida International University
04/21/2015
Slide 24
US Air Force VHg Mark II Florida International University
04/21/2015
Slide 25
US Air Force VHg Mark II Florida International University
04/21/2015 Best Performance
Slide 26
US Air Force VHg Mark II Florida International University
04/21/2015 Unstable Air Flow Not Enough Air Flow
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Reduce risk of undetonated ordnance Incorporate English and SI
units Multilingual user manual and warning labels US Air Force VHg
Mark II Florida International University 04/21/2015
Slide 28
US Air Force VHg Mark II Florida International University
Safety Equipment: Safety Glasses Welding Gloves Safe Clearance
Space 04/21/2015
Slide 29
Insulation enclosure is fiber free and environmental friendly
3D printed carriage yoke and material stacks are made out of PLA
(Polylactic acid filament), Biodegradable material, which is
commonly made from corn starch or sugar cane. Compressed Air
instead of liquid nitrogen, nitrogen gas or other harmful substance
that was not safe to use and needed to be properly contained US Air
Force VHg Mark II Florida International University 04/21/2015
Slide 30
Group 4 Materials/Manufacturing Budget Goal: $2000.00 Cooling
System Total: $1014.49 Vortex Tube Spot Cooler
Couplings/Hoses/Generators Carriage Yoke Prototype Total: $210.00
US Air Force VHg Mark II Florida International University
04/21/2015
Slide 31
Overcome any and all obstacles. Enjoy and embrace this
experience. Ability to apply all skills on a large-scale project.
Collaboration between multiple teams. Improve and challenge our
Engineering skills on a global scale. Correspondence with clients
US Air Force VHg Mark II Florida International University
04/21/2015
Slide 32
US Air Force VHg Mark II Florida International University
MonthSept.Oct.Nov.Dec.Jan.Feb.Mar.Apr. Research Design Calculations
Simulation Cost Analysis Assembly Testing 04/21/2015
Slide 33
US Air Force VHg Mark II Florida International University
Function/Team MemberJasonKennyCinthyaMichael SolidWorks/Simulations
Cooling System Damping Material Stacks Manufacturing/Testing
Research System Efficiency Cost Analysis Main Role Supporting Role
04/21/2015
Slide 34
US Air Force VHg Mark II Florida International University
Cooling System: Temperature Difference of 50C or Greater Achieved
Commercially Available Components Recommended Lab Environment at
< 77F Carriage Yoke: Safety Efficiency (1 min. Cycle Time
Reduction) 04/21/2015
Slide 35
US Air Force VHg Mark II Florida International University
Integrate to existing system Air compressor LabView Additional
Thermocouple Expand Vortex Tube Capabilities Heating and cooling
04/21/2015