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An Analysis of Notched Uniaxial Fatigue Data.

PB166259

Publication Date	1955
Personal Author	Dirkes, W. E.
Page Count	62
Abstract	An analysis of the failure trends of fatigue data is presented in terms of the nominal applied stresses. Fatigue failure stresses are related to the maximum tensile stresses applied to test specimens. The concepts presented are used as a means of expressing notched specimen test results as functions of unnotched specimen characteristics. Test data for 2014-T6(14S-T6) and 2024-T4(24S-T4) aluminum alloys and SAE 4130 steel were taken from WADC TR 52-307 and NACA TN 2639 for use in this analysis. The test data available are in agreement with the concepts presented; however, additional data are required to prove the analysis. Data for failure of unnotched fatigue specimens are used as the basis for the development of a method for predicting fatigue test data for notched specimens by a semi-graphical method. Fatigue strengths for notched specimens can be predicted for various mean strengths from tensile test data, fatigue data for unnotched specimens, and a single SN curve for notched specimens. The method as presented is limited to ductile materials tested with axially applied loads and is applicable for fatigue strengths determined for large numbers of cycles. (Author)
Keywords	Fatigue(Mechanics) Metals Test methods Stresses Aluminum alloys Steel Data
Corporate Authors	Illinois Univ., Urbana.
Document Type	Technical Report
Title Note	Rept. for 1 Mar 53-1 Apr 54.
NTIS Issue Number	196401

An Analysis of Notched Uniaxial Fatigue Data.

An Analysis of Notched Uniaxial Fatigue Data.
PB166259

Publication Date	1955
Personal Author	Dirkes, W. E.
Page Count	62
Abstract	An analysis of the failure trends of fatigue data is presented in terms of the nominal applied stresses. Fatigue failure stresses are related to the maximum tensile stresses applied to test specimens. The concepts presented are used as a means of expressing notched specimen test results as functions of unnotched specimen characteristics. Test data for 2014-T6(14S-T6) and 2024-T4(24S-T4) aluminum alloys and SAE 4130 steel were taken from WADC TR 52-307 and NACA TN 2639 for use in this analysis. The test data available are in agreement with the concepts presented; however, additional data are required to prove the analysis. Data for failure of unnotched fatigue specimens are used as the basis for the development of a method for predicting fatigue test data for notched specimens by a semi-graphical method. Fatigue strengths for notched specimens can be predicted for various mean strengths from tensile test data, fatigue data for unnotched specimens, and a single SN curve for notched specimens. The method as presented is limited to ductile materials tested with axially applied loads and is applicable for fatigue strengths determined for large numbers of cycles. (Author)
Keywords	Fatigue(Mechanics) Metals Test methods Stresses Aluminum alloys Steel Data
Corporate Authors	Illinois Univ., Urbana.
Document Type	Technical Report
Title Note	Rept. for 1 Mar 53-1 Apr 54.
NTIS Issue Number	196401