Personalized 3D Helmet
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Helmets are very important. A head injury means a brain injury and if that head injury is so intense or sever, it may lead to death. Helmets are used to prevent head injuries and will provide some protection for your head, face, or neck. 1.6-3.8 million sports related concussions occur in the United States each year. According to the Cosumer Reports National Research Center, 58 percent of Americans don't wear a helmet while cycling and in 2007, 92 percent of rider killed while cycling were not helmeted.
Helmets are used in various sports and activities. They are worn by lacrosse players, construction workers, and other athletes and workers who have a higher chance of getting a head injury. Skateboarding and longboarding are amongst the trends of the culture and a lot of accidents occur while performing these activites; people run into eachother, they fall, etc. For this project I decided to design a model of a typical motorcyclist helmet. This type of helmet are made with fiberglass reinforced with Kevlar or carbon fiber. Helmets are constructed from an inner EPS “Expanded Polystyrene foam” and an outer shell to protect the EPS. The density and the thickness of the EPS is designed to cushion or crush on impact to help prevent head injuries. Some manufacturers even offer different densities to offer better protection. The outer shell can be made of plastics or fiber materials. Some of the plastics offer very good protection from penetration as in lexan (bulletproof glass) but will not crush on impact, so the outer shell will look undamaged but the inner EPS will be crushed. Fiberglass is less expensive than lexan but is heavy and very labor-intensive. Fiberglass or fiber shells will crush on impact offering better protection. Some manufacturers will use Kevlar or carbon fiber to help reduce the amount of fiberglass but in the process it will make the helmet lighter and offer more protection from penetration but still crushing on impact. But this can be very expensive. http://www.protectthebrain.org/Brain-Injury-Research/What-is-a-Concussion-.aspx http://www.bikehugger.com/posts/consumer-reports-58-percent-do/ https://www.allsportprotection.com/How_to_Choose_a_Skateboard_Helmet_s/694.htm https://en.wikipedia.org/wiki/Motorcycle_helmet |
ACCELERATION is a change in speed over a period of time; the higher the acceleration, the faster the change in speed.
COEFFICIENT OF FRICTION is the measurement of the level of friction embodied in a particular material. The formula is μ = f/N, where μ is the coefficient of friction, f, is the amount of force that resists motion, and N is the normal force. Normal force is the force at which one surface is being pushed into another.
CRUMPLE ZONES are areas of an object designed to deform and crumple in an impact, as a means to absorb the energy of a collision. The fronts of most automobiles are designed as crumple zones to protect the passengers from frontal collisions.
DRAG is a term used in fluid dynamics that is sometimes referred to as air resistance or fluid resistance. Friction is one of multiple factors that influence the amount of drag encountered by a body moving through a fluid such as air or water.
INERTIA: when an object remains still or moves in a constant direction at a constant speed.
G FORCE: a force acting on a body as a result of acceleration or gravity, informally described in units of acceleration equal to one g.
FRICTION is a force that resists motion when two objects or surfaces come in contact.
FORCE causes masses to accelerate; they are influences that cause a change of movement, direction, or shape. When you press on an object, you are exerting a force on it. When a robot is accelerating, it does so because of the force its wheels exert on the floor. Force is measured in units such as pounds or newtons. For instance, the weight of an object is the force on the object due to gravity (accelerating the object towards the center of the earth).
KINETIC FRICTION (or dynamic friction) occurs when two objects are moving relative to each other and rub together (like a sled on the ground).
NEWTON'S SECOND LAW OF MOTION
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
COEFFICIENT OF FRICTION is the measurement of the level of friction embodied in a particular material. The formula is μ = f/N, where μ is the coefficient of friction, f, is the amount of force that resists motion, and N is the normal force. Normal force is the force at which one surface is being pushed into another.
CRUMPLE ZONES are areas of an object designed to deform and crumple in an impact, as a means to absorb the energy of a collision. The fronts of most automobiles are designed as crumple zones to protect the passengers from frontal collisions.
DRAG is a term used in fluid dynamics that is sometimes referred to as air resistance or fluid resistance. Friction is one of multiple factors that influence the amount of drag encountered by a body moving through a fluid such as air or water.
INERTIA: when an object remains still or moves in a constant direction at a constant speed.
G FORCE: a force acting on a body as a result of acceleration or gravity, informally described in units of acceleration equal to one g.
FRICTION is a force that resists motion when two objects or surfaces come in contact.
FORCE causes masses to accelerate; they are influences that cause a change of movement, direction, or shape. When you press on an object, you are exerting a force on it. When a robot is accelerating, it does so because of the force its wheels exert on the floor. Force is measured in units such as pounds or newtons. For instance, the weight of an object is the force on the object due to gravity (accelerating the object towards the center of the earth).
KINETIC FRICTION (or dynamic friction) occurs when two objects are moving relative to each other and rub together (like a sled on the ground).
NEWTON'S SECOND LAW OF MOTION
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Reflection
When I began working on this project I had no idea what I was doing. The videos I was assigned to watch were not up to date and it made it hard to learn. This project was very difficult, but I was able to get some help from fellow students who knew how to use fusion 360 and could teach me how to use it. This was my first time using fusion 360, but I could see myself using it sometime in the future. The best part of this project was seeing my final work, while the worst was figuring out what to do. In the future I could be more prepared to learn a form of creating objects on computers.