TY - JOUR
T1 - Fatigue limit evaluation of blunt-notched specimen using ΔK th value of small crack
AU - Matsueda, T.
AU - Noguchi, H.
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2011
Y1 - 2011
N2 - It is the big problem to evaluate the fatigue limit σw in order to safely design structures and machines. Under the condition of the fatigue crack initiation limit σw1, the present author defined the initial crack scale √area using the characteristic elastic field of the notch, the half length of the fatigue crack a and a notch depth t. Using this √area, the methods of calculating ΔKth and σw1 were proposed. In addition to it, in this condition it is made sure that ΔKth exists on the band from ΔK th prediction line of the micro fatigue crack [1] within 18% error. Using ΔKth calculated by the prediction line and the value of √area, this evaluating method of σw1 was confirmed with annealed 0.35% carbon steel. As a result, it was confirmed that this method to evaluate σw1 is within 18% error. Moreover it was also confirmed that the σw1 value by this prediction method is within 10% error when the predicted σw1 value is greater than σw2.
AB - It is the big problem to evaluate the fatigue limit σw in order to safely design structures and machines. Under the condition of the fatigue crack initiation limit σw1, the present author defined the initial crack scale √area using the characteristic elastic field of the notch, the half length of the fatigue crack a and a notch depth t. Using this √area, the methods of calculating ΔKth and σw1 were proposed. In addition to it, in this condition it is made sure that ΔKth exists on the band from ΔK th prediction line of the micro fatigue crack [1] within 18% error. Using ΔKth calculated by the prediction line and the value of √area, this evaluating method of σw1 was confirmed with annealed 0.35% carbon steel. As a result, it was confirmed that this method to evaluate σw1 is within 18% error. Moreover it was also confirmed that the σw1 value by this prediction method is within 10% error when the predicted σw1 value is greater than σw2.
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U2 - 10.1016/j.proeng.2011.04.168
DO - 10.1016/j.proeng.2011.04.168
M3 - Article
AN - SCOPUS:80052920661
SN - 1877-7058
VL - 10
SP - 1023
EP - 1028
JO - Procedia Engineering
JF - Procedia Engineering
ER -