Determine the Basquin's law equation for the alloy. Use the following fatigue data, (about a zero-mean stress), for the above alloy: Stress Range (MPa) Number of cycles to failure 290 106 155 1011
Determine the Basquin's law equation for the alloy. Use the following fatigue data, (about a zero-mean stress), for the above alloy: Stress Range (MPa) Number of cycles to failure 290 106 155 1011
Materials Science And Engineering Properties
1st Edition
ISBN:9781111988609
Author:Charles Gilmore
Publisher:Charles Gilmore
Chapter11: Fracture And Fatigue
Section: Chapter Questions
Problem 11.7P
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Question
Can you answer part i please
![b)
Sinusoidal fatigue tests (about a zero mean stress) were carried out on two
identical aluminium alloy specimens.
i)
Determine the Basquin's law equation for the alloy.
Use the following fatigue data, (about a zero-mean stress), for the above alloy:
Stress Range (MPa) Number of cycles to failure
290
106
155
1011
(Note: for the Basquin's equation, present the values of the constants, a and
logC1, to four decimal places)
ii)
Determine the number of cycles for a component, made from the same
material as above, which is required to sustain a fatigue stress range of 200
MPa (about a zero-mean stress).
An engineering component, made from the same material as above, has
encountered 70 x 107 cycles at a stress range of 200 MPa. It is desired to
extend the airframe life by a further 50 x 107 cycles. Determine the decrease in
stress range necessary to achieve the additional life.
сусіод](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8eff1a48-e34b-4c41-938b-7e79c0661988%2F57e2bdd2-f4d5-4b18-8935-cc2c0d3e2899%2Fg95lawh_processed.jpeg&w=3840&q=75)
Transcribed Image Text:b)
Sinusoidal fatigue tests (about a zero mean stress) were carried out on two
identical aluminium alloy specimens.
i)
Determine the Basquin's law equation for the alloy.
Use the following fatigue data, (about a zero-mean stress), for the above alloy:
Stress Range (MPa) Number of cycles to failure
290
106
155
1011
(Note: for the Basquin's equation, present the values of the constants, a and
logC1, to four decimal places)
ii)
Determine the number of cycles for a component, made from the same
material as above, which is required to sustain a fatigue stress range of 200
MPa (about a zero-mean stress).
An engineering component, made from the same material as above, has
encountered 70 x 107 cycles at a stress range of 200 MPa. It is desired to
extend the airframe life by a further 50 x 107 cycles. Determine the decrease in
stress range necessary to achieve the additional life.
сусіод
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