Reliability - ANSWER Statistical measure of the probability that a mechanical
element will not fail in use
Reliability R = 0.90 - ANSWER 90% chance the part will not fail
Deterministic method - ANSWER Design factor: nd = loss of function
parameter / maximum allowable parameters
The factor of safety - ANSWER Design factor of the final design
Strength - ANSWER Inherent property of a material or a mechanical element
Heat treatments
May not be uniform through a part
Stress - ANSWER Surface force per unit area at a point within a body
Probability of failure - ANSWER the number of instances of failures per total
number of possible instances
Reliability related to probability of failure - ANSWER R = 1 - Pf
6 out if 1000
element will not fail in use
Reliability R = 0.90 - ANSWER 90% chance the part will not fail
Deterministic method - ANSWER Design factor: nd = loss of function
parameter / maximum allowable parameters
The factor of safety - ANSWER Design factor of the final design
Strength - ANSWER Inherent property of a material or a mechanical element
Heat treatments
May not be uniform through a part
Stress - ANSWER Surface force per unit area at a point within a body
Probability of failure - ANSWER the number of instances of failures per total
number of possible instances
Reliability related to probability of failure - ANSWER R = 1 - Pf
6 out if 1000
