Principles 1

Question 1

Material Science

Answer 1

Study of interplay between the properties of structures and changes in solids

Question 2

Material Science covers

Answer 2

-Forces
-Properties of materials
-Reactions

Question 3

Structural Form

Answer 3

Underlying structure that maintains the form of the object when it is subjected to forces.

Question 4

Stress

Answer 4

The concentration of internal forces within a structural member measured as the force per unit of cross-sectional area.

Question 5

Stress formula

Answer 5

Force/cross-sectional area or F/A

Question 6

Strain

Answer 6

The relative change in size and shape of a material resulting from the application of stress.

Question 7

Strain formula

Answer 7

elongation/original length or delta L/L

Question 8

Modulus of Elasticity

Answer 8

ratio of stress to strain in the elastic region described as Hooke’s law

Question 9

Plastic Behavior

Answer 9

Strain is disproportionate to the stress and the member will never return to its original size when the stress is removed.

Question 10

Tension

Answer 10

tendency of particles of a material to be pulled apart

Question 11

Compression

Answer 11

tendency for the particles of a material to be pressed together

Question 12

Shear

Answer 12

tendency of the particles of a material to slide past one another

Question 13

Torsion

Answer 13

rotational shear that occurs when a member is twisted around its axis

Question 14

Bending

Answer 14

tendency of a member to bow as a result of loads applied perpendicular to its longest axis