1.3 – STRESS TRANSFORMATION For each of the questions below, choose the best answer. The stress matrix and associated principal stresses are as given. Using this information choose the closest correct answer to 3 significant figures. Name Email 1. The first stress invariant is 60.0 ksi -60.0 ksi 40.0 ksi -40.0 ksi None of the above 2. The second stress invariant is 100.0 ksi^{2} 1,100.0 ksi^{2} -1,100.0 ksi^{2} 500.0 ksi^{2} None of the above 3. The third stress invariant is 6,000.0 ksi^{3} 60,000.0 ksi^{3} 600.0 ksi^{3} 8,000.0 ksi^{3} None of the above 4. The stress σ_{xx} is 22.0 ksi (T) 22.0 ksi (C) Zero 17.5 ksi (T) None of the above 5. The maximum shear stress is 25.0 ksi 60.0 ksi 40.0 ksi 50.0 ksi None of the above 6. The octahedral normal stress is 20.0 ksi (T) 20.0 ksi (C) 13.3 ksi (C) 13.3 ksi (T) None of the above 7. The magnitude of octahedral shear stress is 17.0 ksi 16.0 ksi 18.0 ksi 20.0 ksi None of the above 8. The magnitude of the stress vector on the plane whose outward normal makes the angle of 90^{o}, 45^{o}, 45^{o} to the principal coordinates is 14.4 ksi 21.21 ksi 15.81 ksi 17.15 ksi None of the above 9. The magnitude of normal stress on the plane whose outward normal makes the angle of 90^{o}, 45^{o}, 45^{o} to the principal coordinates is 10.0 ksi 12.0 ksi 20.0 ksi 5.0 ksi None of the above 10. The magnitude of shear stress on the plane whose outward normal makes an angle of 90^{o}, 45^{o}, 45^{o} to the principal coordinates is 10.0 ksi 15.0 ksi 25.0 ksi 21.21 ksi None of the above Do you have any comments or suggestions? Please email them to author@madhuvable.org Time's up