1. Engineering
  2. Mechanical Engineering
  3. include numerical answers please mainly need help with part 234...

Question: include numerical answers please mainly need help with part 234...

Question details

The electrical hoist is used to lift loads and to hold them in position. Its major part is a chain drive connected to shaft. The shaft transports the load via two bearings or bushings, through the housing, into its mount. The maximum weight the hoist is specified to carry is 250 lbf. The entire shaft is manufactured from a material, with a yield strength S 55 ksi, and an ultimate tensile strength Sut-65 ksi. The company that manufactures the shaft knows the material well. However, it is difficult for them to predict what users going to do with the hoist and how much load one exerts to the material. Your task is to verify the factor of safety for the shaft for a static load situation (holding load at a certain height); ignore all grooves and material discontinuities. Chain drive wheel .3 1.6 Space for bearing Chain Chain Figure 1: The shaft is embedded in the hoist and drives a chain drive wheel (all dimensions in

inch). Cnain Chain Figure 1: The shaft is embedded in the hoist and drives a chain drive wheel (all dimensions in inch). Problem 1: Determine the maximum stress for the shaft and the given situation. Problem 2: Draw the failure theory envelope (Tresca and von Mises). Label it completely. Add a value for all important points. Problem 3: Determine the factor of safety and explain whether the part is safe or will fail Problem 4: What failure theory is more appropriate in this situation? Which one would you rely on? Explain your decision. Use a ruler or program for all sketches and drawings, hand scribblings will not be graded.

Include numerical answers please (mainly need help with part 2,3,4)

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