Influence Rule of Annular Notch Geometric Parameter on the Tubing Surface: A Case Study

In regards to the problem of tubing precision separation, high-efficiency separation method for under eccentric wheel high-speed rotational bending fatigue loading is proposed, which aims promote initiation cracks at root annular V-notch on surface. Research stress concentration effect notch surface carried out. The design takes into account characteristics separation. numerical simulation calculation includes four kinds notches, namely, V-notch, U-notch, asymmetric towards blanking end direction 45°, and away from 45°. crack propagation lengths produced by each same experimental conditions are investigated experimentally. According findings, suitable this method. By analyzing theoretical factor surface, three main parameters affecting field determined, angle, depth, base angle radius. Through analysis, influence law radius obtained. Based process ideal geometric parameter presented within a reasonable value range. For validation experiment 45# steel, 304 stainless T2Y copper tube selected, respectively. Finally, great achieved, verifies selection parameter.