Podcast
Questions and Answers
What is the main cause of fatigue failure in materials?
What is the main cause of fatigue failure in materials?
- Repeated loading and unloading (correct)
- Lack of proper maintenance
- Static load beyond material capacity
- Excessive tensile or yield strength
When does fatigue failure typically occur?
When does fatigue failure typically occur?
- After a lengthy period of repeated stress or strain cycling (correct)
- Immediately upon the application of stress
- Only under static load
- At high loads above the material's tensile strength
In what way is fatigue failure different from static failure?
In what way is fatigue failure different from static failure?
- Fatigue failure occurs without warning (correct)
- Fatigue failure is always ductile in nature
- Static failure involves gross plastic deformation
- Static failure occurs after repeated stress cycling
What type of stress is necessary for fatigue to occur in a material?
What type of stress is necessary for fatigue to occur in a material?
In what kind of components/structures is fatigue failure a common phenomenon?
In what kind of components/structures is fatigue failure a common phenomenon?
What is the nature of fatigue failure in materials?
What is the nature of fatigue failure in materials?
Which fluctuating stress-time mode accounts for fatigue failures with symmetrical amplitude about a mean zero stress level?
Which fluctuating stress-time mode accounts for fatigue failures with symmetrical amplitude about a mean zero stress level?
What is the term for the type of stress cycle where maximum and minimum stresses are asymmetric?
What is the term for the type of stress cycle where maximum and minimum stresses are asymmetric?
What is the term for a material failure caused by the initiation and propagation of cracks due to repeated loading and unloading?
What is the term for a material failure caused by the initiation and propagation of cracks due to repeated loading and unloading?
"Fatigue in rotated shaft carries a pulley while rotating" is an example of what kind of fatigue?
"Fatigue in rotated shaft carries a pulley while rotating" is an example of what kind of fatigue?
What type of stress can be cyclic or random in dynamic loads?
What type of stress can be cyclic or random in dynamic loads?
Which type of test provides useful values for material selection and component dimensioning for statically loaded components?
Which type of test provides useful values for material selection and component dimensioning for statically loaded components?
What is the name of the test result that represents the relationship between stress amplitude and the number of cycles to failure?
What is the name of the test result that represents the relationship between stress amplitude and the number of cycles to failure?
In which type of application must components be designed to avoid permanent deformation?
In which type of application must components be designed to avoid permanent deformation?
What does the intensity of stress do in tensile, compression, and bending tests until the load finally fractures the specimen?
What does the intensity of stress do in tensile, compression, and bending tests until the load finally fractures the specimen?
Which factor affects fatigue properties by causing microscopic voids in the material?
Which factor affects fatigue properties by causing microscopic voids in the material?
