Fusion 360 Design
ResearchACCELERATION is a change in speed over a period of time; the higher the acceleration, the faster the change in speed. Acceleration is a rate of change of speed; NO change means NO acceleration. If something is moving at constant speed, it is NOT accelerating.
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. Force is measured in units such as pounds or newtons. KINETIC FRICTION (or dynamic friction) occurs when two objects are moving relative to each other and rub together (like a sled on the ground). ReflectionThis project was very informative, and taught me skills that I would be able to use in the future. Not only did I learn about the regulations, why helmets are used, and the science behind it was very interesting, but I was able to design my own helmet around that which added another dimension to the learning. There was a major difference between this project and projects or work that I do in other classes. This project was very relatable and was simply explained. At first, the Autodesk Fusion 360 CAD program was very confusing and I couldn't understand how to work it, but eventually I got it; over time, I believe that I can become better at using Fusion 360 and design some products on my own. Overall, I enjoyed the project because it was very hands-on and informative.
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Learning ObjectiveFor our second project in STEM Engineering, we were tasked with:
My DesignAfter researching for how to design a helmet, the first thing that a helmet would advertise would be safety. A helmet has to pass all safety regulations before it can be sold or used. Also, it would have to withstand huge amounts of force or friction to keep the head safe.
Newton's second law of motion states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. Going at astronomical speeds for motorcyclist or Formula One drivers, a hard outer shell and an inner layer of special crushable foam can save your life. Proper helmets have to meet standards of impact, energy absorption, penetration resistance, and retention system. There are special organizations that regulate different types of helmets, Snell and DOT for motorcycles. FIA for Formula One racing, etc. They all have super specific regulations of course, from the depth and hardness of the outer shell to that the force should not exceed 10kN on the inside of the helmet. |