Problem- A round bar made of medium carbon steel is under a cyclic axial load between Pmax = 12 kN and Pmin = 2 kN. Determine the following parameters, assuming that the diameter of the shaft is 4 mm: (a) Amplitude and mean value of the force. (b) Amplitude and mean value of the resulting stress. (c) What is the R value for this loading condition?
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- Two sections of steel drill pipe, joined by bolted flange plates at Ä are being tested to assess the adequacy of both the pipes. In the test, the pipe structure is fixed at A, a concentrated torque of 500 kN - m is applied at x = 0.5 m, and uniformly distributed torque intensity t1= 250 kN m/m is applied on pipe BC. Both pipes have the same inner diameter = 200 mm. Pipe AB has thickness tAB=15 mm, while pipe BC has thickness TBC= 12 mm. Find the maximum shear stress and maximum twist of the pipe and their locations along the pipe. Assume G = 75 GPa.Problem- A round bar made of medium carbon steel is under a cyclic axial load between Pmax = 12 kN and Pmin = 2 kN. Determine the following parameters, assuming that the diameter of the shaft is 4 mm: (a) Amplitude and mean value of the force. (b) Amplitude and mean value of the resulting stress. (c) What is the R value for this loading condition?(Q6) A solid spring steel shaft in small engine with 5hp at 3000rpm is used as a torque measuring device at the rated load. Select a suitable length and diameter combination for this measurement assuming an angular deflection of 10.. The modulus of elastic of the spring steel 28.6x106 psi and the Poisson's ratio is 0.3.
- A mechanism used in printing machinery consists of a tension spring assembled with a preload of 40 N. The mean diameter of the coilis 32 mm with a spring index of 8. The spring has 18 active coils. The spring wire is hard drawn and oil tempered having the following material properties: a.Design shear stress = 700 MPb b. .Modulus of rigidity = 80 kN/mm2 Identify (a) the initial torsional shear stress in the wire, (b) the spring rate, and (c) the force to cause the body of the spring to reach its yield strength.Bearing stress 4. Please provide proper discussion and illustration also complete solution and clear solution please thank you Determine the length of a square key to be used for a 3.73 kW, 1800 rpm electric motor if the motor shaft diameter is 35 mm and the width of the key is approximately one-fourth of the shaft diameter. The allowable shearing stress on the key is 2.45 MPaA flywheel made of AISI 1040 HR steel has inner and outer diameters of 1.5m and 2m, respectively. a. Determine the maximum rotational speed (rpm) it can be subjected to before failure. b. Plot the tangential, radial, and total stress as a function of radius at that 2000 rpm. Take the material density as 7800kg/m3 and Poisson’s ratio 0.292. Yield strength is 290 MPa
- pls find box ur answer Determine the value of the von Mises stress at point A. The von Mises stress at point A is This problem illustrates that the factor of safety for a machine element depends on the particular point selected for analysis. Here you are to compute factors of safety, based upon the distortion-energy theory, for stress elements at A and B of the member shown in the figure. This bar is made of AISI 1006 cold- drawn steel and is loaded by the forces F= 0.55 kN, P = 4 kN, and T = 25 N-m. Given: Sy= 280 MPa. 5 15-mm D. 100 mm- MPa.A mild steel shaft has to transmit 75 kW at 200 rpm. Design a cast Iron flange coupling for the shaft. The allowable stresses are Shear stress for the shaft and keys 40 N/mm²Shear stress for bolts = 28 N/mm²Shear stress for C.I. coupling = 20 N/mm² Take wearing stress as twice the shear stress value and number of bolts for coupling as 6.= A shaft of circular cross-section with diameter 100 mm is sub- jected to a bending moment of M = 10 kN.m, torque T = 30kN.m, and axial load F = 50 kN. Consider for the material of the shaft a yield strength of oy 750 MPa. Determine the design factor of safety using Tresca and von Mises Theories. Hint: find the point in the shaft that would be subjected to the largest stresses caused by the forces applied. Refer the the lecture. Example of Tresca with the inclusion of safety factor: 01 - 03 2 Where N is the safety factor. = бу 2N
- What length of a square key is required for a 5-in diameter shaft transmitting 1000 hp at 1000 rpm? The allowable shear and compressive stresses in the key are 15 ksi and 30 ksi, respectively.The plate of the figure is subjected to a bending moment with irregular cycles, which are repeated. In the graphic one of this cycles is represented in terms of stress which appears in each section whose height is h. The piece is made of ductile steel. Determine the number of repetitions of the sequence which the piece can resist before the failure takes place due to fatigue considering a reliability of 95 %. Data: Sult = 1.000 MPa Syp 3D800 Mра thickness e = 4 mm H = 10 cm h = 5 cm r=1 cm ka = 0,72 kp = 0,95 S(MPa) M 400 h 300 200 100 W -100 -200Required information This problem illustrates that the factor of safety for a machine element depends on the particular point selected for analysis. Here you are to compute factors of safety, based upon the distortion-energy theory, for stress elements at A and B of the member shown in the figure. This bar is made of AISI 1006 cold-drawn steel and is loaded by the forces F= 0.55 kN, P= 4 kN, and T=25 N-m. Given: Sy= 280 MPa. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. B 15-mm D. -100 mm What is the value of the axial stress at point A? The value of the axial stress at point A is MPa.