4) 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, and all geometry changes (steps in the diameter shaft) have a fillet radius of 3 mm. The axle is machined from AISI cold-drawn steel with an ultimate strength of S_u = 690 MPa and a yield strength of S_y= 580 MPa. Calculate the safety factor at the 6.8 kN load and points B and C, which experience moderate bending moments with a geometric feature that causes a stress concentration. Determine the number of cycles to failure of this part. 30 10 -250- -32 B 75 6.8 kN F 38 125 -35 30

4) 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, and all geometry changes (steps in the diameter shaft) have a fillet radius of 3 mm. The axle is machined from AISI cold-drawn steel with an ultimate strength of S_u = 690 MPa and a yield strength of S_y= 580 MPa. Calculate the safety factor at the 6.8 kN load and points B and C, which experience moderate bending moments with a geometric feature that causes a stress concentration. Determine the number of cycles to failure of this part. 30 10 -250- -32 B 75 6.8 kN F 38 125 -35 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

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Concept explainers

Slope and Deflection

The slope in a deflected beam is described as an angle in radians made by the tangent of the section with the original axis of the beam. The deflection at any point on the axis of the beam is defined as the lateral displacement of the point before and after loading.

Question

4) 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, and
all geometry changes (steps in the diameter shaft) have a fillet radius of 3 mm. The axle is machined
from AISI cold-drawn steel with an ultimate strength of S_u = 690 MPa and a yield strength of S_y=
580 MPa. Calculate the safety factor at the 6.8 kN load and points B and C, which experience
moderate bending moments with a geometric feature that causes a stress concentration. Determine
the number of cycles to failure of this part.
30
-10
-250
32
B
6.8 KN
75
-38
100-
с
125
10
35
D
30

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Step 1: Evaluate bending moment of beam.

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Step 2: Evaluate stresses acting at points P, B, and C.

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Step 3: Evaluate factor of safety.

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Step 4: Evaluate number of cycles to failure.

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