Calculate the resulting safety factor

Question

Response to the following :

(a) Calculate the load and resistance factors for a reliability of 99% when the strength has a mean value of 65.4 MPa and COV 22%; the stress has a mean value 32.7 MPA and COV 11%.

(b) Calculate the resulting safety factor and compare it to the safety factor in Problem 1 and comment on your finding.

Problem 1:

(a) Calculate the load and resistance factors using the data of Problem 2 and a reliability of 99%.

(b) Calculate the resulting safety factor.

Problem 2:

Consider a material with measured strength values F given in Table . Assume the expected stress values to be one-half of the values in Table. Calculate the safety factor and the reliability of the system.