TY - GEN
T1 - Fatigue crack propagation characteristics of alumina ceramics
AU - Noguchi, Hiroshi
AU - Mori, Kazuya
PY - 1995/1/1
Y1 - 1995/1/1
N2 - Fatigue tests with frequency of 0, 1, 5, 10, and 20 Hz were carried out on three types of cracked alumina ceramics. A specimen surface was replicated at the maximum stress during one cycle. The crack length was measured on plastic-replica with optical microscope and the crack opening displacement was observed on metal-replica with scanning electron microscope. The fatigue crack propagation rate, da/dN, was not controlled by the stress intensity factor. However an equivalent crack propagation rate da/dt|eq was controlled by the effective stress intensity factor at crack tip obtained from COD, independent of the frequency with some percent scatter.
AB - Fatigue tests with frequency of 0, 1, 5, 10, and 20 Hz were carried out on three types of cracked alumina ceramics. A specimen surface was replicated at the maximum stress during one cycle. The crack length was measured on plastic-replica with optical microscope and the crack opening displacement was observed on metal-replica with scanning electron microscope. The fatigue crack propagation rate, da/dN, was not controlled by the stress intensity factor. However an equivalent crack propagation rate da/dt|eq was controlled by the effective stress intensity factor at crack tip obtained from COD, independent of the frequency with some percent scatter.
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M3 - Conference contribution
AN - SCOPUS:85054800510
SN - 1880653168
T3 - Proceedings of the International Offshore and Polar Engineering Conference
SP - 243
EP - 247
BT - 5th International Offshore and Polar Engineering Conference, ISOPE 1995
PB - International Society of Offshore and Polar Engineers
T2 - 5th International Offshore and Polar Engineering Conference, ISOPE 1995
Y2 - 11 June 1995 through 16 June 1995
ER -