Types of Structures
A push or pull, or anything that causes a change in the motion of an object .
What is a force?
This is the job that the structure is designed to do. For example, a train bridge is designed to support the weight of the train.
What is function?
A measure of the amount of matter in material.
What is mass?
Stresses that act on a structure from outside it. For example, your kick when striking a soccer ball. These produce internal forces.
What are external forces?
A device that can change the amount of force needed to move an object.
What is a lever?
The weight carried or supported by a structure.
What is load?
Are made from more than one type of material. Example: concrete can be reinforced using steel rods.
What are combination structures?
Stresses such as pushes or pulls.
What are forces?
Stresses put on the materials that make up a structure. Are the result of external forces.
What are internal forces?
Car bumpers and sheet metal used in cars are designed to do this in a collision.
What is absorb collision forces OR absorb the impact?
Things with a definite size and shape, which serve a definite function.
What is a structure?
Layers of different materials pressed or glued together.
What are laminations?
This is the standard unit of force.
What is a Newton?
Internal stresses can change the shape of a structure. This change of shape to a structure is called a ...
What is deformation?
In a boat's outboard motor, the propeller is held to the engine with this kind of pin. This pin breaks if the propeller gets tangled in the weeds. This is done to..
What is save the engine?
These objects are strong and hollow and have a thin outer layer that is carefully shaped to provide strength.
What is a shell?
Where a structure's parts are held together.
What are joints?
What is needed to describe a force (think: MDL).
What is the Magnitude, Direction and Location
Bends or tears material by pushing it in opposite directions at the same time.
What is shear force?
If a great enough _______ is applied to a building, it will begin to fail.
force
Examples of this type of structure include football helmets, dams, airplanes, domed buildings, warehouses.
What is a shell?
Glue and cement are types of this joint.
What are adhesives?
The force exerted by gravity on an object; measured in Newtons. This is the scientific term for the everyday term "weight."
What is gravitational force?
Twist the material by turning the ends in opposite directions. Example: doorknob.
What is torsion?
When metal weakens due to stress. This process often results in the metal cracking and breaking.
What is Structural Fatigue?