906 多軸応力下における木材の疲労 : エネルギーロス

概要

論文の詳細を見る
In order to investigate the fatigue behavior of wood, fatigue tests under pulsating axial-torsion combined loading were performed. The specimen used for the experiments was a rectangular bar with one of its major axes in the fiber (longitudinal) direction of wood (Japanese cypress). Pulsating axial and torsion combined loading were respectively applied along and around the longitudinal axis of the specimen, as the triangular waveform of the same phase, and the frequency of a repetition was set to 1 Hz. The accumulation energy loss was discussed by the relation with the fatigue life and the fatigue limit. An accumulation energy-loss began to increase rapidly by about 10% of the number of cycles to failure, and there was a good correlation between the number of times of a repetition at this time, and a fatigue life. The possibility of the fatigue-life prediction was suggested from this result. The fatigue limit was also presumed from the relationships between the mean energy loss per 1 cycle to destruction, a fatigue life, and a stress amplitude level.
一般社団法人日本機械学会の論文
2003-08-05