SLIDE 1
Helmet use reduces head injury
- 51% of cyclists deaths: no helmet
- 82% of cyclists do not wear helmets
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 - - 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
SLIDE 2
SLIDE 3
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”
SLIDE 4
Fold-et
Foldable helmet for convenient carrying
SLIDE 5
Fold-et
Foldable helmet for convenient carrying
How can we create something that is both foldable and protective?
SLIDE 6
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
SLIDE 7
Auxetics allow foldability for helmet
SLIDE 8
Materials Comparison
Material Flexural Yield Strength (MPa) Easy to work with? Easy to work with other materials? Expanded Polystyrene Foam 0.566 No Yes 1095 Spring steel 525 Yes Yes Teflon 14.0-27.6 Yes No
SLIDE 9
Market Research
Price Fold Size Ease to Unfold Appearance Park and Diamond $190
+
- Closca Helmet
$140
- +
+
Fend $99
- +
+
The Original folding Bike Helmet $35
SLIDE 10
Increasing Bike Sharing Market
Market Size Bike sharing: $4.1 million Bike helmet: $223 million
SLIDE 11
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.
SLIDE 12
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].