TY - GEN
T1 - Very high-cycle fatigue characteristics of cross-ply CFRP laminates in transverse crack initiation
AU - Hosoi, Atsushi
AU - Suzuki, Takuro
AU - Kosugi, Kensuke
AU - Atsumi, Takeru
AU - Shimamura, Yoshinobu
AU - Tsuda, Terumasa
AU - Kawada, Hiroyuki
N1 - Publisher Copyright:
© Springer Nature Switzerland AG 2020.
PY - 2020
Y1 - 2020
N2 - Fan blades are subjected to very high-cycle loadings during the design life, so it is essential to evaluate the giga-cycle fatigue characteristics of carbon fiber reinforced plastic (CFRP) laminates. In this study, the transverse crack initiation of the cross-ply CFRP laminates in very high-cycle fatigue region was evaluated using an ultrasonic fatigue testing machine. The fatigue tests were conducted at the frequency of f = 20 kHz and the stress ratio of R = −1. In order to suppress temperature rise of the specimen, the intermittent operation with the loading time of 200 ms and the dwelling time of 2000 ms was adopted. The fatigue life data to transverse crack initiation in very high-cycle fatigue region was compared with the data of the fatigue test which was conducted at the frequency of f = 5 Hz and the stress ratios of R = 0.1 and −1 using a hydraulic control fatigue test machine. It was evaluated considering the influences of the stress ratio and the thermal residual stress by using the modified Walker model. The fatigue life to the transverse crack initiation of the cross-ply CFRP laminates in the very high-cycle region exceeding 108 cycles was on the extension of the test data in the low cycle region.
AB - Fan blades are subjected to very high-cycle loadings during the design life, so it is essential to evaluate the giga-cycle fatigue characteristics of carbon fiber reinforced plastic (CFRP) laminates. In this study, the transverse crack initiation of the cross-ply CFRP laminates in very high-cycle fatigue region was evaluated using an ultrasonic fatigue testing machine. The fatigue tests were conducted at the frequency of f = 20 kHz and the stress ratio of R = −1. In order to suppress temperature rise of the specimen, the intermittent operation with the loading time of 200 ms and the dwelling time of 2000 ms was adopted. The fatigue life data to transverse crack initiation in very high-cycle fatigue region was compared with the data of the fatigue test which was conducted at the frequency of f = 5 Hz and the stress ratios of R = 0.1 and −1 using a hydraulic control fatigue test machine. It was evaluated considering the influences of the stress ratio and the thermal residual stress by using the modified Walker model. The fatigue life to the transverse crack initiation of the cross-ply CFRP laminates in the very high-cycle region exceeding 108 cycles was on the extension of the test data in the low cycle region.
KW - CFRP
KW - Giga-cycle fatigue
KW - Transverse crack
KW - Ultrasonic
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U2 - 10.1007/978-3-030-21503-3_66
DO - 10.1007/978-3-030-21503-3_66
M3 - Conference contribution
AN - SCOPUS:85071840159
SN - 9783030215026
T3 - Lecture Notes in Mechanical Engineering
SP - 838
EP - 846
BT - ICAF 2019 – Structural Integrity in the Age of Additive Manufacturing - Proceedings of the 30th Symposium of the International Committee on Aeronautical Fatigue, 2019
A2 - Niepokolczycki, Antoni
A2 - Komorowski, Jerzy
PB - Springer Science and Business Media Deutschland GmbH
T2 - 30th Symposium of the International Committee on Aeronautical Fatigue, ICAF 2019
Y2 - 2 June 2019 through 7 June 2019
ER -