In the figure below the shaft is simply supported in ball bearings at A and D. The shaft rotates and the stationary load F is 6.8 kN. All fillets have a 3-mm radius. The shaft is machined from AISI 1050 cold- drawn steel. Estimate the life of the part. Repeat with: working temp T=330 °C, reliability R=90% 30 A R₁ 10 - 250 32 B 75 6.8 kN | 38 C -100 125 D 10->> -35 R₂ 30

In the figure below the shaft is simply supported in ball bearings at A and D. The shaft rotates and the stationary load F is 6.8 kN. All fillets have a 3-mm radius. The shaft is machined from AISI 1050 cold- drawn steel. Estimate the life of the part. Repeat with: working temp T=330 °C, reliability R=90% 30 A R₁ 10 - 250 32 B 75 6.8 kN | 38 C -100 125 D 10->> -35 R₂ 30

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Figure below shows a portion of a pump that is gear-driven at uniform load and speed. The 25 mm diameter solod shaft supported by the bearings is to be made of machined AISI 1045 CD steel. The helical gear is subjected to the axial force F =499 y a radial load F = 741 N and a tangential load of F=2,006 N. Assume the component is operating at room temperature of 70°F and the material has 50% reliability factor. 25-mm solid Bending K, = 2.0 round shaft Fillet Torsional K = 1.5 F. F, Axial K, = 1.8 F Pump Helical spur gear 50 mm -250-mm dia.- FIGURE 1. Identify the critical location(s) of stress and show it clearly in a diagram. 2. Identify cleary, all the components of stresses (at the critical point) that will be calculated (by drawing and clearly showing the XYZ axes) and show it in a matrix form. Show which components of stresses will have a value zero or non-zero. 3. Calculate the principal stresses and principal directions. Show the principal stresses clearly in a stress element…
5. A non-rotating shaft made of AISI 1018 CD steel is machined to the shape shown below. A load Fy = -250 lbf (pointing down) and F, = F, = 0 lbf is repeatedly applied and removed. Determine the factor of safety for fatigue based on Goodman criterion. If the life is not infinite, estimate the number of cycles to failure (f = 0.9 for S-N curve). 2 in 9 in 1-in dia. B -in R. 2 in 1-in dia. 1글-in dia. -in din. 12 in
A stepped shaft has dimensions of D = 2 in., d = 1 in., and r= 0.1 in. It is machined from AISI steel of 200 Bhn hardness. The load is fully reversed axial torsion. 30 seconds of time history of the nominal torsional stress in the 1 in, section of the shaft, Tnom(t) = Tr/J, is shown (dots indicate the beginning/end of each load cycle; there are 20 cycles total in 30 seconds.). This duty cycle continues repeating. (a) Use Miner's rule to estimate the life of the shaft in cycles. (b) What is the expected life in hours. Su 0.5HB for steel. 30 20 10 -10 -20 -30 30 seconds D=2 in. d=1 in. f= 0.1 in. 200 Bhn
a) The rotating step shaft is subjected to the force as shown in the figure. It is supported by bearings at A and F. The shaft is machined using AISI 1040 CD steel. Determine the minimum fatigue factor of safety based on achieving infinite life. If infinite life is not predicted, estimate the number of cycles failure. Also check for yielding. Given Data: (Notch sensitivity (q)=0.8, Sut=85 kpsi, Syield= 71 kpsi, Surface condition modification factor ka=0.879, Size modification factor kb=0.790, Load modification factor kc=1, fatigue fraction (f)=0.867) * In order to determine Kt; Use Figure A-15-9 in your textbook. Dimensions are in inch and all fillet radius:1/14 inch y 860 lbf de 1.75 1.5 1.0 1.0 B V A| D E F 0.5 8 -8.5- R1 R2 -19.5 20
Required information The shaft shown in the figure is machined from AISI 1040 CD steel. The shaft rotates at 1600 rpm and is supported in rolling bearings at A and B. The applied forces are F₁ = 800 lbf and F2=1200 lbf. Determine the minimum fatigue factor of safety based on achieving infinite life. If infinite life is not predicted, estimate the number of cycles to failure. Also check for yielding -10 in- -10 is -fim All Gillets in R. What are the values of the theoretical stress-concentration factor, the notch sensitivity, and the fatigue stress-concentration factor? The value of the theoretical stress concentration-factor is The value of the notch sensitivity is. The value of the fatigue stress concentration-factor is [
The rotating shaft shown in the figure is machined from AISI 1040 CD steel (sy = 490 MPa, Sut = 590 MPa). It is subjected to a transverse force of F = 8 kN between the supports. The system designed to be operated at a temperature of 120°C with a reliability of 99%. Estimate the number of cycles to failure. All dimensions are in mm. Assume all fillets are 3mm in radius. 25 D. 20 20 -35 D. 180- 3 R. 500 F 280 -175- -50 D. 25 D. | ª -20 20
Requlred Informatlon The shaft shown in the figure is machined from AISI 1040 CD steel. The shaft rotates at 1600 rpm and is supported in rolling bearings at A and B. The appled forces are F = 900 Ibf and F2 = 1350 Ibf. Determine the minimum fatigue factor of safety based on achieving infinite life. If infinite life is not predicted, estimate the number of cycles to fallure. Also check for ylelding. -8 in- -8 in- 8 in F2 17 in in 3 in -10 in- -10 in- in 글 in All fillets in R. B What are the values of the theoretical stress-concentration factor, the notch sensitivity, and the fatigue stress-concentration factor? The value of the theoretical stress concentration-factor Is The value of the notch sensitivity is The value of the fatigue stress concentration-factor Is
Problem 2: F = 10 kip -10 in- -5 in- -5 in- d/5 R. R1 d/ 10 R. 1.4 d- R2 I in The shaft shown above rotates at 1200 RPM and supports a 10 kip load. The material of the shaft is 1095 hot-rolled steel and its surface is machined and then polished. Using a factor of safety of 1.6, specify the minimum value of diameter d for a life of 1,000 hours.
The figure shows a shaft mounted in bearings at A and D and having pulleys at B and C. The forces shown acting on the pulley surfaces represent the belt tensions. The shaft is to be made of AISI 1035 CD steel. The shaft is rotating at speed of 1000 rpm. Find the minimum factor of safety for fatigue based on infinite life. If the life is not infinite, estimate the number of cycles. Be sure to check for yielding. Take shaft diameter to be 1.5 inches.
A rotating shaft of 40×4 mm AISI 1018 cold-drawn steel tubing has a 6 mm diameter hole drilled transversely through it. Estimate the factor of safety guarding against fatigue and static failures using the Gerber and Langer failure criteria for the following loading conditions: a. The shaft is subjected to a completely reversed torque of 120 N.m in phase with a completely reversed bending moment of 150 N.m. b. The shaft is subjected to a pulsating torque fluctuating from 20 to 160 N.m and as steady bending moment of 150 N.m.
2. At a machined shaft shoulder the small diameter d is 25mm the large diameter D is 40mm, and the fillet radius is 2.5 The bending moment is 2300N mm and the steady torsion moment is 1800 N mm The heat-treated steel shaft has an ultimate strength of Sut- 850Mpa The reliability goal is 099 (ka- 0.786, kb 0.870, ke 0.814) Determine the fatigue factor of safety of the design described in this section
Q-3 A 25-mm-diameter solid round bar has a groove 2.5-mm deep with a 2.5-mm radius machined into it. The bar is made of AISI 1050 CD steel and is subjected to a purely reversing torque of 250 N-m. For the S-N curve of this material, let f = 0.9. (a) Estimate the number of cycles to failure. (b) If the bar is also placed in an environment with a temperature of 400°C, estimate the number of cycles to failure.