Question

A steel pipe of 3.5-in. outer diameter is to be used to transmit a torque of 2950 lb-ft without exceeding an allowable shearing stress of 8 ksi. A series of 3.5-in-outer-diameter pipes is available for use. Knowing that the wall thickness of the available pipes varies from 0.25 in. to 0.50 in. in 0.0625-in. increments, choose the lightest pipe that can be used. 3.5 in. Click to select) (Click to select) Use the pipe with thickness = 0.4375 in. Use the pipe with thickness = 0.5 in. Use the pipe with thickness = 0.375 in. Use the pipe with thickness = 0.25 in. Use the pipe with thickness = 0.3125 in.

Answer 1

Hesa oulerg lia , D= 3.s inch Snner ia , d = 3.5-2t wheea t hickness f ?haft Toxq Also T = 2950 -' 2950 xl0 12 K-inch 3S.4 K-inch shaar stess 8 Ksi T Kmow tho, hellow we T = 4 hese 16 3.S 2.9 3.S-2t 2.9 t 0.297 inch haрut tt be usad hat Hence tins is 0.3125 ineh ick