stress strain & fatigue

Question 1

ultimate stress formula

Answer 1

US = 1.5 * yield stress

Question 2

shear formula

Answer 2

shear = V/A

V - shear force at location
A - section area parallel to shear force

Question 3

strain formula

Answer 3

strain = change is dimension/original dimension

Question 4

low cycle fatigue meaning and example

Answer 4

large load over long period of time

loading/ pressurization

Question 5

high cycle fatigue meaning and examples

Answer 5

smaller loads over a short period of time

turbine/compression

Question 6

design load, safety factor equation

Answer 6

design load = UTs/safety factor

Question 7

shear stress formula

Answer 7

F shear Ulti. stress: Ps / A

Fs - fastener ultimate shear stress
Ps - shear load
A - area of rivet

Question 8

bearing stress formula

Answer 8

bru = Pb / (d * t)

bru - bearing ultimate stress
Pb - bearing load
d - diameter
t - thickness

Question 9

tear out stress formula

Answer 9

Fsu = Pto / [(2e - 0.766D)*t]

Fsu - shear ultimate stress
Pto - tear out load
e - edge distance
d - diameter
t - thickness

Question 10

net tension formula

Answer 10

Ftu = Pnet / [(W - D)*t]

Ftu - UTS
Pnet - tension load
W - material width
D - diameter
t - thickness