948 焼結合金の面圧疲労におけるき裂進展特性

概要

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In order to study rolling contact fatigue behavior of sintered alloy, FEM (Finite Element Method) analysis and rolling contact fatigue tests were carried out. Contact fatigue damage was observed as subsurface crack initiation and propagation. Subsurface crack growth behavior was evaluated by an interrupted test. Crack length increased with increasing number of cycles. Crack initiation and propagation in the subsurface of specimen induced a spalling mode of fracture. Stress distribution of subsurface was estimated by FEM analysis. The location of the maximum shear stress by FEM analysis coincided with the depth of crack initiation point observed in experiments. The position of the maximum shear stress approached to the specimen surface with increase in the tangential force at the contact surface. Subsurface crack growth behavior was dominated by shear stress amplitude.
一般社団法人日本機械学会の論文
2002-09-20