Q3: The bar below is made of carbon steel (1035-hot rolled) and is loaded by the forces F = 0.55 kN, P = 8.0 kN, and T = 30 N. m. Compute the factors of safety, based upon the distortion-energy theory. B A 100 mm- 20-mm D. F T P x
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- Repeat Problem 11.2-3 assuming that R= 10 kN · m/rad and L = 2 m.Answer is closer to 32 kN/m, but how does it get there?This problem illustrates that the factor of safety for a machine element depends on the particular point selected for analysis. This bar is made of AISI 1006 cold-drawn steel and is loaded by the forces F=0.55 kN, P=4.0 kN, and T=25 N·m. (For AISI 1006 cold- drawn steel, S=280 MPa. “D." means diameter) (a) Calculate factor of safety at the position A based on the distortion-energy theory by calculating the von Mises stress. [6] (b) Calculate factor of safety at the position B based on the distortion-energy theory by calculating the von Mises stress. [6] unti O 15-mm D.
- The figure shows a cast-iron bearing block that is to be bolted to a steel ceiling joist and is to support a gravity load of 18 kN. Bolts used are M24 ISO 8.8 with coarse threads and with 4.6-mm-thick steel washers under the bolt head and nut. The joist flanges are 20 mm in thickness, and the dimension A, shown in the figure, is 20 mm. The modulus of elasticity of the bearing block is 135 GPa. (a) Find the wrench torque required if the fasteners are lubricated during assembly and the joint is to be permanent. (b) Determine the factors of safety guarding against yielding, overload, and joint separation.1) Ball bearings support the rotating axle shown below at points A and D. The rotating axle is loaded by a stationary (non-rotating) force of F = 6.8 kN. In the drawing below, all dimensions are in mm. While the real part has fillets (r=3mm), you can assume an abrupt change in geometry for each shaft step for this problem. The axle is machined from AISI cold-drawn steel with an ultimate strength of S_u = 690 MPa, a yield strength of S_y=580 MPa, and a modulus of Elasticity of E_steel = 207 GPa. Determine the displacement at the 6.8 kN load and points B and C. 6.8 KN 30 10 250 32 B 75 38 100 10-1 -35 30The figure gives the cross-section of a grade 25 cast-iron pressure vessel. A total of N bolts are to be used to resist a separating force of 150 kN. (a) Determine kb, km, and C. (b) Find the number of bolts required for a load factor of 2 where the bolts may be reused when the joint is taken apart. (c) With the number of bolts obtained in part (b), determine the realized load factor for overload, the yielding factor of safety, and the load factor for joint separation. Use (SI) units as it applies
- 4 dia 16 R. 3. The grip strengthener shown in Fig. 1 is composed of a helical spring made of 4 mm diameter A227 hard-drawn Wire clip wire. The main coil has an outer diameter OD = 32 mm and a total number of body turns N= 3.5. During operation, assume that the force applied to the handles Molded 112.5 plastic handle 87.5 occurs at a distance of 50 mm from the base of the handle. Using a design factor at closure of n, = S,lo,= 1.1, calculate the torsional spring constant k' and the force F, required to close the handles. 75 Fig. 1Solve fast Include fbd. UrgentNeeds Complete solution with 100 % accuracy. Don't use chat gpt or ai i definitely upvote you. Be careful Downvote for ai or chat gpt answer.
- Requlred Informatlon A rotating shaft of 25-mm dlameter Is simply supported by bearing reaction forces R;and R2. The shaft is loaded with a transverse load of 13 kN as shown In the figure. The shaft is made from AISI 1045 hot-rolled steel. The surface has been machined. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. 200 mm 25 mm 13 kN -50 mm Not to acale Determine the minimum fatigue factor of safety based on achleving Infinite life. The minimum fatigue factor of safety isAn ACME-thread power screw is considered. The coefficient of friction of the thread is mu. The external load on the screw is F. d = 1.75; % (in) major diameter | = 0.25; % (in) screw lead mu = 0.2; % coefficient of friction for thread F = 2000; % (lb) external load on the screw Find: 2.4 the moment required for lowering the load (Ib in)A steel rod is subjected to a reversed axial load of 180 kN. Find the diameter of the rod for a factor of safety of 2. Neglect column action. The material has an ultimate tensile strength of 1070 MPa and yield strength of 910 MPa. The endurance limit in reversed bending may be assumed to be one-half of the ultimate tensile strength. Other correction factors may be taken as follows: For axial loading (Ka) = 0.7; For machined surface (Ksur) = 0.8 ; For size (Ksz) = 0.85 ; For stress concentration(Kf)= 1.0.3.