OD In Figure show the fatigue curve for a metal. a) If a sample was taken from this material with diameter 5mm and tested on latigue device under constant load 29,4 N far 125.2 mm from the specimen. Find the critical number of cycle in revolution ? b) Find the endurance limit for this material.

OD In Figure show the fatigue curve for a metal. a) If a sample was taken from this material with diameter 5mm and tested on latigue device under constant load 29,4 N far 125.2 mm from the specimen. Find the critical number of cycle in revolution ? b) Find the endurance limit for this material.

Elements Of Electromagnetics

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ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Question

O) In Figure show the fatigue curve for a metal.
a) If a sample was taken from this material with diameter 5mm and tested on
fatigue device under constant load 29,4 N far 125.2 mm from the specimen.
Find the critical number of cycle in revolution ?
b) Find the endurance limit for this material.
500
(ee
200
leo
4.
6 7
2.
No.of cycles (logM)
stress N/mm

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Help me answer pls
I am only interested in part 6-27(a). I see that Bartleby has answered this question before but I have a question regarding the yielding factor of safety. Why is the yielding factor of safety calculated as ( n=Sy/sigma_max), but not as ( n=Sy/Kt*sigma_max )? Since there is a stress concentration factor and the sigma_max is technically considered the nominal stress.
A rod specimen of ductile cast iron was tested in a torsion-testing machine. The rod diameter was 14 mm, and the rod length was 440 mm. When the applied torque reached 225.3 N-m, a shear strain of 2105 microradians was measured in the specimen. What was the angle of twist in the specimen? Calculate the shear stress in the specimen. Answer: T= 418.16 Use Hooke's Law to calculate the shear modulus of the specimen. answer: MPa G = i MPa
A rod specimen of ductile cast iron was tested in a torsion-testing machine. The rod diameter was 30 mm, and the rod length was 300 mm. When the applied torque reached 260.8 N·m, a shear strain of 1605 microradians was measured in the specimen. What was the angle of twist in the specimen?
Only the highlighted I need want to make sure I did it right
a) Refer to the figure below. Even though the cyclic loading accidentally caused the stresses to exceed the levels at point A slightly (as marked by the red arrow), the machine part may not break instantly according to the Modified Goodman fatigue failure criterion. True or False - Yield (Langer) line Gerber line - Load line, slope r = S„ISm Modified Goodman line S. I JA ASME-elliptic line Soderberg line ! Sm S, Midrange stress om b) good fatigue design should keep the fatigue design factor of safety at a minimum value of (_ Alternating stress o
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I am only interested in part 6-27(a). I see that Bartleby has answered this question before but I have a question regarding the yielding factor of safety. Why is the yielding factor of safety calculated as ( n=Sy/sigma_max), but not as ( n=Sy/Kf*sigma_max)? Since there is stress concentration factor.