Tooth surface fatigue fracture risk assessment method

• Main Authors: DAI XIANWU, FENG HOUBIN, ZHOU YE, XU XIAONA, CHEN XIAOJIN, BAI HOUYI, LIU SIYUAN, YE WEI
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention relates to the technical field of mechanical transmission mechanism design, in particular to a tooth surface fatigue fracture risk assessment method, which comprises the following steps of: 1, converting a gear pair meshing contact model into a two-dimensional plane contact model, and establishing a simplified model in finite element software; 2, inclusion types are added into the contact model, and mechanical parameters of the inclusion types are set; 3, calculating the stress distribution of the secondary surface of the tooth surface containing the inclusions; step 4, calculating equivalent residual stress and local shear strength of the material; and step 5, calculating a gear exposure coefficient according to a material exposure coefficient theory, and predicting a tooth surface fatigue fracture risk according to a distribution curve of the exposure coefficient along the depth direction of the tooth surface. According to the scheme, the raw material inclusion attribute is added when the gear