Types of Structures
These are the three types of structures.
What are a mass or solid, shell and frame?
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?
These are the three ways structures can fail.
What is bending/buckling, shear and torsion ?
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.
Bend or buckle to absorb collision forces or impact?
Things with a definite size and shape, which serve a definite function.
What is a structure?
A way to describe structures as natural or...?
What is manufactured?
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 failure or 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?
Mass is measured in what unit and using what measuring tool?
grams or kilograms and a balance
This type of force 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.
What is weight?
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 Metal Fatigue?