Fold-et Sketch Model Review Team Blue A Helmet use reduces head - PowerPoint PPT Presentation

Fold-et Sketch Model Review Team Blue A

Helmet use reduces head injury ● 51% of cyclists deaths: no helmet ● 82% of cyclists do not wear helmets

Helmet use reduces head injury ● 51% of cyclists deaths: no helmet ● 82% of cyclists do not wear helmets 55% of 150 respondents “Inconvenient to store and carry”

Fold-et Foldable helmet for convenient carrying

Fold-et Foldable helmet for convenient carrying How can we create something that is both foldable and protective ?

Foam Core Sketch Model Hypothesis: Using a material with greater stiffness is a great way to test scalability of the structure for greater shock absorption Result: A foam core origami model demonstrated that the structure has to be significantly thinner than the length and width dimensions to fold

Auxetics allow foldability for helmet

Materials Comparison Easy to work Flexural Yield Easy to work Material with other Strength (MPa) with? materials? Expanded 0.566 No Yes Polystyrene Foam 1095 Spring steel 525 Yes Yes Teflon 14.0-27.6 Yes No

Market Research Price Fold Size Ease to Unfold Appearance + - - Park and Diamond $190 - + + Closca Helmet $140 - + + Fend $99 The Original folding - - - $35 Bike Helmet

Increasing Bike Sharing Market Market Size Bike sharing: $4.1 million Bike helmet: $223 million

References ● Gehler, J., Cantz, M., O’Brien, J. F., Tolksdorf, M., and Spranger, J., 1975, “Mannosidosis: Clinical and Biochemical Findings,” Birth Defects Orig. Artic. Ser., 11 (6), pp. 269–272. ● Hendrickson, W. A., and Ward, K. B., 1975, “Atomic Models for the Polypeptide Backbones of Myohemerythrin and Hemerythrin,” Biochem. Biophys. Res. Commun., 66 (4), pp. 1349–1356. ● Bose, K. S., and Sarma, R. H., 1975, “Delineation of the Intimate Details of the Backbone Conformation of Pyridine Nucleotide Coenzymes in Aqueous Solution,” Biochem. Biophys. Res. Commun., 66 (4), pp. 1173–1179. ● Hendrickson, W. A., and Ward, K. B., 1975, “Atomic Models for the Polypeptide Backbones of Myohemerythrin and Hemerythrin,” Biochem. Biophys. Res. Commun., 66 (4), pp. 1349–1356. ● Stellwagen, E., and Babul, J., 1975, “Stabilization of the Globular Structure of Ferricytochrome c by Chloride in Acidic Solvents,” Biochemistry, 14 (23), pp. 5135–5140. ● Caras, I., and Shapiro, B., 1975, “Partial Purification and Properties of Microsomal Phosphatidate Phosphohydrolase from Rat Liver,” Biochim. Biophys. Acta, 409 (2), pp. 201–211.

References cont. ● Lumholtz, I. B., 1975, “[Nurses’ drug information; therapeutic action group: benzodiazepines. 3],” Sygeplejersken, 75 (40), p. 12. ● Van Gorkom, H. J., Pulles, M. P., and Wessels, J. S., 1975, “Light-Induced Changes of Absorbance and Electron Spin Resonance in Small Photosystem II Particles,” Biochim. Biophys. Acta, 408 (3), pp. 331–339. ● “Bicycling: number of participants U.S. 2017 | Statistic,” Statista. [Online]. Available: https://www.statista.com/statistics/191204/participants-in-bicycling-in-the-us-since-2006/. [Accessed: 04-Oct-2018]. ● “Bike sharing total trips taken US 2010-2017 | Statistic,” Statista. [Online]. Available: https://www.statista.com/statistics/912765/bike-sharing-total-trips-taken-us/. [Accessed: 04-Oct-2018]. ● “U.S. bicycle industry - market size 2004-2015 | Statistic,” Statista. [Online]. Available: https://www.statista.com/statistics/255614/size-of-the-bicycle-market-in-the-united-states/. [Accessed: 04-Oct-2018]. ● P. Taylor, “The Stats Behind the Bicycle Helmet,” BicycleUniverse.info, 23-Mar-2018. [Online]. Available: https://bicycleuniverse.info/stats-behind-bicycle-helmet/. [Accessed: 04-Oct-2018]. ● Bicycle Helmet Statistics. [Online]. Available: https://helmets.org/stats.htm. [Accessed: 04-Oct-2018].