The machine shown in Figure P7-33 on page 433 is an overload protection device that releases the load when the shear pin S fails. Determine the maximum von Mises stress in the upper part ABE if the pin shears when its shear stress is 40 MPa. Assume the upper part to have a uniform thickness of 6 mm. Assume plane stress conditions for the upper part. The part is made of 6061 aluminum alloy. Is the thickness sufficient to prevent failure based on the maximum distortion energy theory? If not, suggest a better thickness. (Scale all dimensions as needed.)

Figure P7-33

Figure P7-33

Use a computer program to help solve the design-type problems, 7.33 through 7.39?

Transcribed Image Text:

120 30 60 E 24 50 D Dimensions in millimeters Released position