Author: Anonymous

I am a teacher and need help creating exam problems. Please recommend more incorrect answers to the following problem but do not explain your logic. At a point subjected to plane stress on the surface of a compressed air cylinder, the stresses are σx = –80 MPa, σy = 40 MPa, and τxy = –80 MPa. Determine shear stress τnt at the point for a counterclockwise coordinate rotation of 52°.

I am a teacher and need help creating exam problems. Please recommend more incorrect answers to the following problem but do not explain your logic. At a point subjected to plane stress on the surface of a compressed air cylinder, the stresses are σx = 27 ksi, σy = 26 ksi, and τxy = –9 ksi. Determine shear stress τnt at the point for a counterclockwise coordinate rotation of 66°.

I am a teacher and need help creating exam problems. Please recommend more incorrect answers to the following problem but do not explain your logic. A silicone rubber [E = 6.90 MPa, G = 2.30 MPa] wristband has an initial length of 101 mm and a width of 13 mm. If the wearer imparts a normal stress of 550 kPa in the length direction while putting it on, what is the corresponding change in width?

Create 5 variations of the following problem but do not show the answers. At a point in a body subjected to plane strain, the strains are εx = 830 με, εy = 730 με, and γxy = 440 μrad. Determine the magnitude of the absolute maximum shear strain at the point.

I am a teacher and need help creating exam problems. Please recommend more incorrect answers to the following problem but do not explain your logic. A Mohr’s circle is shown for a point in a physical object that is subjected to plane stress. If 1 grid square = 8 MPa, determine the stress σx.

Create 5 variations of the following problem but do not show the answers. At a point in a body subjected to plane strain, the strains are εx = –530 με, εy = –710 με, and γxy = 130 μrad. Determine the magnitude of the absolute maximum shear strain at the point.

I am a teacher and need help creating exam problems. Please recommend more incorrect answers to the following problem but do not explain your logic. At a point subjected to plane stress on the surface of a compressed air cylinder, the stresses are σx = –30 ksi, σy = –15 ksi, and τxy = 29 ksi. Determine normal stress σn at the point for a clockwise coordinate rotation of 69°.

Create 5 variations of the following problem but do not show the answers. At a point subjected to plane stress on the surface of a structural member, the stresses are σx = 24 ksi, σy = 23 ksi, and τxy = 6 ksi. Determine the magnitude of the absolute maximum shear stress at the point.

Create 5 variations of the following problem but do not show the answers. At a point in a body subjected to plane strain, the strains are εx = –530 με, εy = –380 με, and γxy = 70 μrad. Determine principal strain εp2 at the point.

Create 5 variations of the following problem but do not show the answers. At a point in a body subjected to plane strain, the strains are εx = –500 με, εy = –520 με, and γxy = –130 μrad. Determine principal strain εp2 at the point.