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

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

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: inches

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

comparison of our various cross sections.

Critical Design Sketches

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

Optimization Methods Criterion Value Adj. (%) Blade Grips (score) Blade Support (score) Sym. Blade (score) Cut-outs (score) Heat Treat (score) Stiffness Safety Mfg Func Cost Mkt Durabilit y Score Σ Design Matrix

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

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