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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

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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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
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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