For the given mechanical system in Fig. 1. A weight-lifting mechanism. The pulley is used to...

  

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For the given mechanical system in Fig. 1. A weight-lifting mechanism. The pulley is used to support the rob which lifts the load. Pulley is linked to a solid rectangular plate using a riveted joint. Strip is welded (with a joint like square) to the plate which is fixed to I-beam's flange with a group of bolts. The I-beam is fixed to I and. Assume reasonable values for any missed data. Known dimensions in mm are as follows: 400 200 300 300 200 650 150 280 520 100 90 System is made of material that have mechanical properties: Sy Sut 600 MPa 800 MPa Rivet material properties: Sy 550 MPa Knowing that the applied force on system Sut 770 MPa E 210 GPa R = 4 KN With angle 0 = 0° (2.1) Find the thickness (t) of the right welded rectangular plate at the critical section based on Von Mises yield criteria for static load with FOS = 4. (2.2) Find the weld size S if the welding material has S, = 800 MPa and FOS = 1.1. (2.3) Compare results of point (2.2) with point (2.1) and comment. (2.4) Bolts: if the bolts are (M18X2) and Fastening two plates with equal thickness = 15 mm. (a) The resultant load on each bolt (b) The maximum shear stress in each bolt (c) The maximum bearing stress. (2.5) Rivets: Find the diameter of rivets if FOS=1.5 and minimum thickness of plate that 2 the pulley and rivets attached to if the safety factor is 3. (2.6) Is it preferred to increase distances between rivets or not? C 8 0 • A Critical Section C F H FIG.1 R For the given mechanical system in Fig. 1. A weight-lifting mechanism. The pulley is used to support the rob which lifts the load. Pulley is linked to a solid rectangular plate using a riveted joint. Strip is welded (with a joint like square) to the plate which is fixed to I-beam's flange with a group of bolts. The I-beam is fixed to I and. Assume reasonable values for any missed data. Known dimensions in mm are as follows: 400 200 300 300 200 650 150 280 520 100 90 System is made of material that have mechanical properties: Sy Sut 600 MPa 800 MPa Rivet material properties: Sy 550 MPa Knowing that the applied force on system Sut 770 MPa E 210 GPa R = 4 KN With angle 0 = 0° (2.1) Find the thickness (t) of the right welded rectangular plate at the critical section based on Von Mises yield criteria for static load with FOS = 4. (2.2) Find the weld size S if the welding material has S, = 800 MPa and FOS = 1.1. (2.3) Compare results of point (2.2) with point (2.1) and comment. (2.4) Bolts: if the bolts are (M18X2) and Fastening two plates with equal thickness = 15 mm. (a) The resultant load on each bolt (b) The maximum shear stress in each bolt (c) The maximum bearing stress. (2.5) Rivets: Find the diameter of rivets if FOS=1.5 and minimum thickness of plate that 2 the pulley and rivets attached to if the safety factor is 3. (2.6) Is it preferred to increase distances between rivets or not? C 8 0 • A Critical Section C F H FIG.1 R

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21 Answer The thickness of the right welded rectangular plate at the critical section can be determined using the Von Mises yield criteria for static load with FOS 4 The maximum shear stress max is gi... View the full answer