Science 7 Unit D Flashcards
(26 cards)
The Three main types of structures
Shell,Frame and Solid
What Is a shell structure
A solid outer surface but is hollow in the inner area
what is a Frame structure
Made of rigid arrangement of parts or structural components fastened together
What is a solid structure
formed from a solid peace or a solidi combination of peaces of some strong materials
What is aesthetics
The pleasing appearance of an object cause of it’s design
What is meant by a function of a structure
what the structure is meant to do
Some forms of structural failure
Buckling,shearing,separating,deformation
What is a dynamic load
loads that change over time
what is a static load
a weight that stays the same
What are 3 internal forces
compression,tension,shear
What are some structural components
Arches,Beams,Trusses,Cantilevers, and Columns
What are complementary forces
When different types on internal forces act on the same structures at the same time
What are joints
A place at which two or more components are joined together
What are two types of joints
Fixed and movable
What is the margin of safety
the limits within which the safety aspects are considered to be acceptable
What is a strong structural shape
triangle
What is brittleness
how easily a object breaks
What is ductility
how easily a material into a wire
What is plasticity
how easily the material is made into a shape
What is deformation
the change of shape of a structure
What is flexibility
the ability of a materiel to be bent under force without breaking
What are 3 environmental factors that affect the structures
Climate,Terrain, and Earthquake Risk
What are some examples of shell structures
shell,dome,fan cover,circle globe,etc…
What are some examples of a frame structure
skeleton,house,glasses frame,bed frame,chair
