MATERIALS IN DOMESTIC AND INDUSTRIAL AP

Question 1

Elasticity

Answer 1

Sample That Has Been Deformed By Force Returns To Original Shape When Force Causing Deformation Removed

Question 2

Stress- Strain Curve

Answer 2

Gives Relationship b\w Stress & Strain

Gradually Applying Load To Material & Measuring Deformation

Curve Reveal Many Properties Of Material

Question 3

Elastic Limit

Answer 3

Material Begins To Suffer Plastic Deformation

Don’t Return To Original Shape

Question 4

Strength

Answer 4

Max Stress Material Can Bare

Occurs Before Material Fractured & Fails

Question 5

Plastic Deformation

Answer 5

Occur Under Stress Level

Material Begins To Flow Like Liquid

Does Not Turn To Original Shape

Question 6

Creep

Answer 6

Solid Material Under Stress Move Slowly & Deforms Permanently Over Time

Question 7

Fatigue

Answer 7

Progressive & Structural Damage Occur Slow Levels Deform
If Repeated Loading & UnLoading

Question 8

Ductility

Answer 8

Stretched & Put under Tension Without Breaking

Drawn Into Wires

Atoms Slide Over Eachother

Deformed Under Tensile Stress

Question 9

Brittleness

Answer 9

Cannot be permanently stretched

Break soon after elastic limit

Very strong under pressure

Question 10

Density

Answer 10

Material defined as mass per unit vol of material

Question 11

Hookes law

Answer 11

Extension produced by a force in wite or spring directionally proportional to force applied up to limit of proportionality

Question 12

Equation for hookes law

Answer 12

F = K 🔼 x

Question 13

K in F = K 🔼 x

Answer 13

Spring constant

Question 14

F in F = K 🔼 x

Answer 14

Force

Question 15

🔼x in F = K 🔼 x

Answer 15

Change

Question 16

Strain energy

Answer 16

Area under force graph for elastic material represents work done in stretching material

Question 17

Work done stretching material equasion

Answer 17

E= 1/2 F 🔼X

Question 18

Energy stormed in spring =

Answer 18

Work done in stretching spring