280曲轴RR法成形的三维有限变形弹塑性有限元模拟

3D FINITE DEFORMATION ELASTOPLASTIC FEMSIMULATION OF RR UPSETTING PROCESSOF 280 CRANKSHAFT

大型曲轴的全纤维成形工艺是保证曲轴能够在复杂的应力状态下正常工作的一种有效的工艺方案，由于其成形过程复杂，变形过程的应力场和应变场很难用实验方法确定。本文基于ＡＮＳＹＳ工作平台，利用开发的三维有限变形弹塑性有限元程序，模拟了２８０曲轴的ＲＲ法成形过程，得到了不同摩擦条件变形过程的应力场、应变场和载荷位移曲线。

The RR upsetting process of heavier crankshaft is an effective technology which ensures the continuous fibre in the forming process.Therefore,the crankshaft can work well under complicated stress state.But it is very difficult to obtain the distribution of stress and strain with the common experiment method for the complex forming process.Based on the ANSYS software,with the developed 3D finite deformation elastoplastic FEM,the forming process of 280 crankshaft is simulated under different friction conditions.At last,the distribution of stress and strain,the force and displacement curves are given,which provide the possiblity for building the optimum forming technology,defining die geometry configuration,improving the forging quality and extending the die life.