TY - GEN
T1 - Experimental determination of fatigue lives of rotating aluminum alloys using Weibull analysis
AU - Vlcek, Brian L.
AU - Hendricks, Robert C.
AU - Zaretsky, Erwin V.
AU - Parker, John
PY - 2006
Y1 - 2006
N2 - Rotating beam fatigue tests with three aluminum alloys AL 2024, AL 6061, and AL 7075 at three stress levels were analyzed and compared using Weibull statistical analysis. These fatigue results were also analyzed and compared based on average life and ASTM Standard E739-91 (2004). Based upon Weibull statistical analysis, AL 2024 alloy had the longest fatigue life of the three materials followed in order by AL 7075 and AL 6061. The stress-life exponents n for the 10-percent life L10 were 4.42, 6.57, and 5.84 for AL 2024, AL 6061, and AL7075, respectively. Statistically distinguishing differences between the fatigue lives of AL 7075 and AL 6061 was not possible either using average values of life or median values from ASTM Standard E739-91 (2004). While the minimum number of samples that the ASTM specification recommends may be adequate to establish an S-N relation, it may not be adequate to distinguish differences in fatigue lives with any statistical certainty between two or more materials.
AB - Rotating beam fatigue tests with three aluminum alloys AL 2024, AL 6061, and AL 7075 at three stress levels were analyzed and compared using Weibull statistical analysis. These fatigue results were also analyzed and compared based on average life and ASTM Standard E739-91 (2004). Based upon Weibull statistical analysis, AL 2024 alloy had the longest fatigue life of the three materials followed in order by AL 7075 and AL 6061. The stress-life exponents n for the 10-percent life L10 were 4.42, 6.57, and 5.84 for AL 2024, AL 6061, and AL7075, respectively. Statistically distinguishing differences between the fatigue lives of AL 7075 and AL 6061 was not possible either using average values of life or median values from ASTM Standard E739-91 (2004). While the minimum number of samples that the ASTM specification recommends may be adequate to establish an S-N relation, it may not be adequate to distinguish differences in fatigue lives with any statistical certainty between two or more materials.
KW - Aluminum fatigue life
KW - ASTM specification
KW - Rotating shaft fatigue life
KW - Weibull analysis
UR - http://www.scopus.com/inward/record.url?scp=84866935071&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:84866935071
SN - 9781604236774
T3 - Proceedings of the 11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11
SP - 622
EP - 629
BT - Proceedings of the 11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11
PB - ISROMAC-11
T2 - 11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11
Y2 - 26 February 2006 through 2 March 2006
ER -