1) The part shown is made of AISI 1035 CD steel loaded at point B with...

Transcribed Image Text:

1) The part shown is made of AISI 1035 CD steel loaded at point B with 300 lbf in the negative y direction, at point C with 200 lbf in the negative z direction, and at point D with a force with components of 60 lbf in the positive x direction and 75 lbf in the positive y direction. The diameter of bar AB is 0.75 in. 75 lbf 60 lbf 0.75-in dia 300 lbf B 5.5 in Sin 200 lbf 6 in (a) Based on failure at the wall at A, determine the factor of safety using the maximum-shear-stress theory. (b) Based on failure at the wall at A, determine the factor of safety using the distortion-energy theory. 2) This problem illustrates that the factor of safety for a machine element depends on the particular point selected for analysis. Here you are to compute factors of safety, based upon the distortion-energy theory, for stress elements at A and B of the member shown in the figure. This bar is made of AISI 1006 cold-drawn steel and is loaded by the forces F = 0.55 kN, P = 4.0 kN, and T = 25 Nm. B -100 mm 15-mm dia. 3) A brittle material has the properties Sut = = 30 kpsi and Suc = 90 kpsi. Using the brittle Coulomb-Mohr and modified-Mohr theories, determine the factor of safety for the following states of plane stress. (a) ox=-15 kpsi, Oy 10 kpsi, xy = 15 kpsi (b) ox = 20 kpsi, oy = 20 kpsi, txy =15 kpsi 1) The part shown is made of AISI 1035 CD steel loaded at point B with 300 lbf in the negative y direction, at point C with 200 lbf in the negative z direction, and at point D with a force with components of 60 lbf in the positive x direction and 75 lbf in the positive y direction. The diameter of bar AB is 0.75 in. 75 lbf 60 lbf 0.75-in dia 300 lbf B 5.5 in Sin 200 lbf 6 in (a) Based on failure at the wall at A, determine the factor of safety using the maximum-shear-stress theory. (b) Based on failure at the wall at A, determine the factor of safety using the distortion-energy theory. 2) This problem illustrates that the factor of safety for a machine element depends on the particular point selected for analysis. Here you are to compute factors of safety, based upon the distortion-energy theory, for stress elements at A and B of the member shown in the figure. This bar is made of AISI 1006 cold-drawn steel and is loaded by the forces F = 0.55 kN, P = 4.0 kN, and T = 25 Nm. B -100 mm 15-mm dia. 3) A brittle material has the properties Sut = = 30 kpsi and Suc = 90 kpsi. Using the brittle Coulomb-Mohr and modified-Mohr theories, determine the factor of safety for the following states of plane stress. (a) ox=-15 kpsi, Oy 10 kpsi, xy = 15 kpsi (b) ox = 20 kpsi, oy = 20 kpsi, txy =15 kpsi