1. Standout Technical Designers MAE 416: ME Senior Design Sponsored by Cooper Hand Tools Group K4: Nate OuelletteNathan MizeJustin Bridges Brian SearsChris EvansPooria Javidi

2. Outline Problem Statement/Constraints Design Options Design selection Design layout Analysis Fabrication Testing Results Recommendation Concluding Remarks

3. Problem Statement Design a new tape blade with a minimum standout of at least 10ft while adhering to the defined problem constraints Constraints Blade length: 25 ft Width: 1.1 inches Thickness: 0.0047 inches

4. Critical Design Features Based on Combination of Ideas Utilizes Original Lufkin Dimensions – Requires Less Changes in Production Edges turned over – Double Thickness Flats Slots Cut Along Blade Length – First 2’ of Length – Diminishing Returns Coil Extendable Support – Coil wire attached to the blade

5. comparison of our various cross sections.

7. Critical Design Sketches

8. Statistical Consideration Factors Test how material will perform – Test sample to yield- calculation. – Population mean= 95.24 ksi – Population variance=5.1816 ksi – Coefficient of variance= 0.0169  Probability density for Ultimate Tensile Strength of 1095 carbon steel.  Cumulative probability

9. Optimization Methods Criterion Value Adj. (%) Blade Grips (score) Blade Support (score) Sym. Blade (score) Cut-outs (score) Heat Treat (score) Stiffness0.2520.50030.75-2-0.530.8 Safety0.2500-0.25-0.3-0.330.8 Mfg.0.2-0.2-0.2-0.220.430.6 Func.0.1520.32 2 2 30.5 Cost0.5-0.5-0.5-221-3-1.5 Mkt.0.51 1 1 2121 Durabilit y 0.5-3-1.5-0.5-2 -0.510.5 Score Σ 100 -0.9 -0.65 -0.9 1.45 2.6 Design Matrix

10. Ethics Engineering Ethics are a set of standards which define engineers’ obligations to the public, their clients, and the profession. Fundamental Canons – 1 st Canon- Safety – 2 nd Canon- Perform Services in Expertise – 3 rd Canon- Avoid Conflicts of Interest

11. Concluding Remarks Focused on a Single Design Continued Testing and Simulation Remain on Schedule Stay on Budget Looking Ahead to Prototype Fabrication Any Questions?