The Numerical Simulation Research Of Fracture Splitting Techniques Of Connecting Rod And The Influence To Fracture Splitting Force

In recent years, the automobile industry flies to develop soon, the manufacturing method and techniques of connecting rod has pay tremendous concern by the domestic and international. As a new technique of connecting rod, fracture splitting technique has been developed gradually at some automobile developed country in 1990' s, and is apply in gradually large-scale produce realm, is important change to the tradition techniques of connecting rod , have become the important mark that a nation launches engine connecting rod manufacturing industry development level.Fracture splitting skill has been researched deeply by abroad. Although the fracture splitting technology of connecting rod has been accepted in many mobile manufacture companies in domestic, the most equipments has import from abroad, even the materials have import. The core technique has always been monopolized by foreigner. The domestic also start the research of the techniques. There are still a lots of problems, including post-splitting, non-splitting, the distortion of splitting face etc in recent product. Those problems influence the quality stability of products. But the influence percentages on the results of fracture splitting of connecting rod are many more, But right now how those influence percentages on the splitting results of connecting rod are not obvious. The selection of fracture splitting force parameter mainly depends on experience and no theory can abide by.In this paper aim at the technique of fracture splitting of engine connecting rod, the materials fitting to fracture splitting have been analyzed, according to some influence factors that the former has researched. The influence that the chemistry compositions to the mechanics function and the physical function in steel have been analyzed. The theory of quasistatic fracture splitting of suitable connecting rod for engine EA827 has been studied. Aimed at the new material C70S6, the quasistatic procedure has been numerical simulation analyzed by SPH non-mesh method. The solved stress intensity factor module and parameterize model building module have been developed based ANSYS by APDL. Through the numerical simulation analysis, the stress concentration status before the crack splits has been researched, and the have been found. The relationships between fracture splitting force, factor and opening angle, curvature radius,the depth of crackle groove have been carried out.Through analysis and research above, a new study method of fracture splitting of connecting rod has been confirmed, some variable regularity of techniques parameters have been obtained. Secondary development of ANSYS has been searched. All of them will be advantage with future study work.