At the beginning of this project, we were required to go through a series of tutorials on how to build a standard helmet in Fusion 360, so that we could learn how to operate the program. Once we had learned how it worked, we went on to design our helmet, first using perspective and orthographic drawings, (which can be seen below) and then making a 3D model (found here). We were also required to do our research on how helmets worked to negate crashes, and create a document detailing our findings, which can also be found below.
Another helmet view:
Concepts Used:
Acceleration: Acceleration is a measurement of velocity over time. Abrupt changes in velocity can be very dangerous to humans, as they impart a lot of force. Acceleration is also covered here.
Coefficient Of Friction: The coefficient of friction of a material is the measurement of the level of friction it has. 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 forces involved with the collision between the objects that is causing the friction.
Crumple Zones: The areas of a device designed to absorb an impact by deforming are crumple zones. In our helmet the crumple zone is the inner lining, though the outer lining will also crumple under enough force.
Drag: Also known as air resistance, drag is the amount an object will slow down when it moves through the atmosphere due to air displacement. A good helmet has little drag; a good parachute has lots of drag.
Inertia: Inertia is a object's tendency to resist change. If an object is motionless, it can be hard to get it to start moving, and once it starts moving, it will resist attempts to slow it down, or alter its direction.
G Force: The force acting on the body due to acceleration, measured in units of earth gravity. Unless you are moving very fast right now, you are likely experiencing 1 G. The body can't take too many Gs, so it is important to try and negate as much acceleration as possible during a crash.
Friction: Friction is the force that resists the motion of 2 objects against one another. It prevents everything from being slippery all the time.
Force: A force is any influence that causes a change in movement, direction, or shape. Typing exerts force on the keyboard; a motorcyclist exerts force on the ground to move. There is a force behind any movement. You can calculate force using the equation F=MA.
Kinetic Friction: A force that acts on moving objects that touch each other. Each object will experience a force in the opposite direction to that which they are moving. The strength of the force is decided by the coefficient of friction.
Acceleration: Acceleration is a measurement of velocity over time. Abrupt changes in velocity can be very dangerous to humans, as they impart a lot of force. Acceleration is also covered here.
Coefficient Of Friction: The coefficient of friction of a material is the measurement of the level of friction it has. 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 forces involved with the collision between the objects that is causing the friction.
Crumple Zones: The areas of a device designed to absorb an impact by deforming are crumple zones. In our helmet the crumple zone is the inner lining, though the outer lining will also crumple under enough force.
Drag: Also known as air resistance, drag is the amount an object will slow down when it moves through the atmosphere due to air displacement. A good helmet has little drag; a good parachute has lots of drag.
Inertia: Inertia is a object's tendency to resist change. If an object is motionless, it can be hard to get it to start moving, and once it starts moving, it will resist attempts to slow it down, or alter its direction.
G Force: The force acting on the body due to acceleration, measured in units of earth gravity. Unless you are moving very fast right now, you are likely experiencing 1 G. The body can't take too many Gs, so it is important to try and negate as much acceleration as possible during a crash.
Friction: Friction is the force that resists the motion of 2 objects against one another. It prevents everything from being slippery all the time.
Force: A force is any influence that causes a change in movement, direction, or shape. Typing exerts force on the keyboard; a motorcyclist exerts force on the ground to move. There is a force behind any movement. You can calculate force using the equation F=MA.
Kinetic Friction: A force that acts on moving objects that touch each other. Each object will experience a force in the opposite direction to that which they are moving. The strength of the force is decided by the coefficient of friction.
Reflections:
I did a few things well in this unit. One was specialization. Early on, I saw that our team needed someone to work hard on 3D modeling, and I decided that person was going to be me. I learned how to use Fusion 360, and made the model. I was also good at delegation. I was nominally the leader for this unit, or at least I made sure everyone had a job they were doing.
I did have a few failings over the course of this project, however. One was clearly communication. Despite having a general idea of what everyone was doing, I didn't know how their projects were going, only my own. This led to some confusion. Additionally, I was guilty of procrastination. I largely ignored the project for the first 3 days, because there were other, urgent matters that needed to be taken care of. By the time I looked at this project, I was already behind.
I did a few things well in this unit. One was specialization. Early on, I saw that our team needed someone to work hard on 3D modeling, and I decided that person was going to be me. I learned how to use Fusion 360, and made the model. I was also good at delegation. I was nominally the leader for this unit, or at least I made sure everyone had a job they were doing.
I did have a few failings over the course of this project, however. One was clearly communication. Despite having a general idea of what everyone was doing, I didn't know how their projects were going, only my own. This led to some confusion. Additionally, I was guilty of procrastination. I largely ignored the project for the first 3 days, because there were other, urgent matters that needed to be taken care of. By the time I looked at this project, I was already behind.