1. S OLID -S TATE S MART M ATERIAL B ASED P ROSTHETIC A RM S TATUS U PDATE 2 : A PRIL 3, 2014 1 Advisor: Dr. Onur Bilgen (MAE) Mechanical Subgroup Members: ● Gordon Clark ● Megan Guzman ● Paul Jelenek ● Can Karaoz Electrical Subgroup Members: ● Jared Gongloff ● Brett Lefebvre ● Brad Ketterer ● Mark Levenstein ● Daniel Park ● Stephanie Vasquez SOLID STATE PROSTHETIC SENIOR DESIGN TEAM 2013-2014 ● Michael Pollard ● Theodore Teates

2. SOLID STATE PROSTHETIC SENIOR DESIGN TEAM 2013-2014 2 S IMPLIFIED A RM M ODEL Top View (Arm straight) Artificial muscle in resting position Side View (Arm bent) Artificial muscle contracted

3. SOLID STATE PROSTHETIC SENIOR DESIGN TEAM 2013-2014 3 End Caps SMA/Silicone Muscle SMA A RTIFICIAL M USCLES End Cap Shoulder Screw Weld Nut

4. SOLID STATE PROSTHETIC SENIOR DESIGN TEAM 2013-2014 4 C OMPOSITE LAYUPS OF A NCHOR P OINTS Original weld nut Modified weld nuts Composite layups with the 3 modified weld nuts

5. SOLID STATE PROSTHETIC SENIOR DESIGN TEAM 2013-2014 5 C OMPOSITE LAYUPS OF A CTUATION P OINTS Composite layups of varying thicknesses. 2 Layers 3 Layers 4 Layers 5 Layers

6. SOLID STATE PROSTHETIC SENIOR DESIGN TEAM 2013-2014 6 U PDATED W IRE F RAMING R IG New Wire Frame (longer & slimmer than first frame) Previous Design for End-Cap Placement Modified Frame Design for End-Caps

7. 7 SMA R IBBON F ABRICATION SOLID STATE PROSTHETIC SENIOR DESIGN TEAM 2013-2014 Loop configuration for equal pre-tension Mold for SMA wires and Silicon Posts SMA wire wound from loops through both end-caps and around posts

8. SOLID STATE PROSTHETIC SENIOR DESIGN TEAM 2013-2014 Fabrication 8 Machined end-cap 16 holes for SMA wires to go through Conductive epoxy layer over SMA wires 1 st Layer of structural epoxy

9. 9 SOLID STATE PROSTHETIC SENIOR DESIGN TEAM 2013-2014 Location of Constraints 15 lb Force Max Displacement Elbow Joint Graphite Swatch  Modulus of Elasticity: 198 ksi  Poisson’s Ratio: 0.3  Density: 0.0491 lb/in^3 F INITE -E LEMENT -A NALYSIS M ODEL

10. 10 F INITE -E LEMENT -A NALYSIS M ODEL SOLID STATE PROSTHETIC SENIOR DESIGN TEAM 2013-2014  Modulus of Elasticity: 246.5 ksi  Poisson’s Ratio: 0.1  Density: 0.0578 lb/in^3 Elbow Joint Carbon Fabric Max Stress

11. G ANTT CHART 11 SOLID STATE PROSTHETIC SENIOR DESIGN TEAM 2013-2014

12. T HANK Y OU F OR Y OUR TIME Q UESTIONS OR C OMMENTS ? 12 SOLID STATE PROSTHETIC SENIOR DESIGN TEAM 2013-2014