Repeat Prob. 519 by first plotting the failure loci in the A , B plane

Repeat Prob. 5–19 by first plotting the failure loci in the σ_A, σ_B plane to scale; then for each stress state, plot the load line and by graphical measurement estimate the factor of safety.

(a) σ_x = 25 kpsi, σ_y = 15 kpsi 

(b) σ_x = 15 kpsi, σ_y = -15 kpsi 

(c) σ_x = 20 kpsi, τ_xy = −10 kpsi 

(d) σ_x = -15 kpsi , σ_y = 10 kpsi , τ_xy = -15 kpsi 

(e) σ_x = -20 kpsi , σ_y = -20 kpsi , τ_xy = -15 kpsi