Ch. 6 Mechanical properties

Question 1

Types of deformation

Answer 1

Elastic & Plastic

Question 2

Strain Formula

Answer 2

Strain = deltal / l0

Question 3

Torsion Stress Formula

Answer 3

Strain = F/As = M(turning moment)/ AcR

Question 4

Types of Compression

Answer 4

Linear, Bi-Axial, Hydrostatic

Question 5

Strength

Answer 5

Load it can take (Fishing line)

Question 6

Engineering Stress Formula

Answer 6

Force/Min Cross Section Area

Question 7

True Stress Formula

Answer 7

True Stress = Force/Instantaneous Cross Section Area

Question 9

Lateral Strain Formula

Answer 9

R = delta x / y = tan theta

Question 10

Hookes Law (elastic deformation)

Answer 10

Stress = E * Strain

Question 12

If U > 0.5

Answer 12

Density Increases

Question 13

If Y < 0.5

Answer 13

Density Decreases

Question 14

Elastic Shear

Answer 14

Shear Stress = Shear Modulus * Shear Strain

Question 15

E, G, U formula

Answer 15

E = 2G(1 + U)

Question 16

Strength is the amount of…

Answer 16

Stress Amount

Question 17

Ductility is the amount of…

Answer 17

Strain

Question 18

Toughness is the amount of…

Answer 18

Area under the curve

Question 19

Resilience is the amount of…

Answer 19

Elastic area under the curve

Question 20

Hardness is the amoount of…

Answer 20

Resistance to surface plastic deformation

Question 21

Resilience approx

Answer 21

Stress^2/2E

Question 22

Birnell Hardness measurement

Answer 22

HB = 2P/piD(D-sqrt(D^2-d^2))