# Question: An ASTM cast iron has minimum ultimate strengths of 30

An ASTM cast iron has minimum ultimate strengths of 30 kpsi in tension and 100 kpsi in compression. Find the factors of safety using the MNS, BCM, and MM theories for each of the following stress states. Plot the failure diagrams in the σA , σB plane to scale and locate the coordinates of each stress state.

(a) σx = 20 kpsi, σy = 6 kpsi

(b) σx = 12 kpsi, τx y = −8 kpsi

(c) σx = −6 kpsi, σy = −10 kpsi, τx y = −5 kpsi

(d) σx = −12 kpsi, τx y = 8 kpsi

(a) σx = 20 kpsi, σy = 6 kpsi

(b) σx = 12 kpsi, τx y = −8 kpsi

(c) σx = −6 kpsi, σy = −10 kpsi, τx y = −5 kpsi

(d) σx = −12 kpsi, τx y = 8 kpsi

## Answer to relevant Questions

For Prob. 5–7, case (d), estimate the factors of safety from the three theories by graphical measurements of the load line.A 4142 steel Q&T at 80◦F exhibits Syt = 235 kpsi, Syc = 275 kpsi, and εf = 0.06. Choose and plot the failure locus and, for the static stresses at the critical locations, which are 10 times those in Prob. 5–9, ...An ASTM cast iron, grade 30 (see Table A–24), carries static loading resulting in the stress state listed below at the critical locations. Choose the appropriate failure locus, plot it and the load lines, and estimate the ...Given the summing amplifier shown, select the values of R2 that will produce an output voltage of –3v. The figure shows a shaft mounted in bearings at A and D and having pulleys at B and C. The forces shown acting on the pulley surfaces represent the belt tensions. The shaft is to be made of ASTM grade 25 cast iron using a ...Post your question