圧縮衝撃負荷を受ける指関節の応力解析

概要

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Propagation of the stress wave in a proximal interphalangeal joint during compressive impact loading was analyzed by the dynamic finite element method. The explicit method was used in the analysis and the distribution of stress at each step of the time was evaluated. The maximum principal stress is nearly equal to the minimum one in the articular cartilage and therefore the equivalent stress is very small. The equivalent stress and the principal stress fluctuate with the time in the subchondral bone of the middle phalanx. The concentration of stress is observed there and the maximum principal stress is positive, i.e., tension. The impulsive stress is absorbed when the stress wave travels through the articular cartilage. The relation between the equivalent stress and the impact velocity is dependent on the time and the stress is linearly related to the velocity in a short time after the impact.
社団法人日本機械学会の論文
2001-10-25