8 A special C-clamp shown in the figure below uses a in -10 ACME thread and...

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8 A special C-clamp shown in the figure below uses a in -10 ACME thread and a collar of in effective mean diameter. The collar is attached rigidly to the top end of the externally threaded member. For a thread and collar friction coefficient of f = f = 0.15, determine the following: a) Torque required to develop a 150 lb clamping force on the block. [12 marks] b) Efficiency of the power screw. [4 marks] c) Force required at the end of the 6 in. handle to develop the clamping force in (a). [4 marks] d) Maximum torsional shear stress in the screw body. [4 marks] e) Axial stress in the screw body. [4 marks] f) Maximum bending stress at the root of the thread. [4 marks] g) Von Mises stress at the root of the thread. [4 marks] h) Safety factor against yielding failure of the power screw root using the DE approach with a material having Syt = 29 kpsi. Is this a suitable material?. [4 marks] (Hint: assume single thread system and that the first engaged thread bears 38% of the clamping force} Block 0 -6 in.- All Dimensions are given in inches.. 8 A special C-clamp shown in the figure below uses a in -10 ACME thread and a collar of in effective mean diameter. The collar is attached rigidly to the top end of the externally threaded member. For a thread and collar friction coefficient of f = f = 0.15, determine the following: a) Torque required to develop a 150 lb clamping force on the block. [12 marks] b) Efficiency of the power screw. [4 marks] c) Force required at the end of the 6 in. handle to develop the clamping force in (a). [4 marks] d) Maximum torsional shear stress in the screw body. [4 marks] e) Axial stress in the screw body. [4 marks] f) Maximum bending stress at the root of the thread. [4 marks] g) Von Mises stress at the root of the thread. [4 marks] h) Safety factor against yielding failure of the power screw root using the DE approach with a material having Syt = 29 kpsi. Is this a suitable material?. [4 marks] (Hint: assume single thread system and that the first engaged thread bears 38% of the clamping force} Block 0 -6 in.- All Dimensions are given in inches..

Answer rating: 100% (QA)

Solution a Torque required to develop a 150 lb clamping force on the block First we need to calculate the force that the threaded member applies to the block The clamping force is given as 150 lb and ... View the full answer