Based on the JH-2 theoretical model,an improved JH-2 discrete model for the finite element simulation of brittle materials is established,which is used to redevelop the client module of DEFORM software as a constitutive model. And the cutting force of engineering ceramics is simulated and analyzed. Through the fluorophlogopite turning test,the simulation effects of the JH-2 discrete model and J-C idealized model are compared. The effects of three process parameters,namely cutting speed,feed speed and cutting depth,on the cutting force simulation are analyzed. And the accuracy and reliability of the JH-2 model are verified. The test results show that the variation trend of the simulation value of cutting force is the same as that of the test value,and the precision is good. Compared with the J-C idealized model,the machining morphology of brittle materials simulated by the JH-2 discrete model is more consistent with the actual situation. Therefore,in the finite element research of engineering ceramics,the improved JH-2 discrete model has significant advantages over the J-C model in theoretical analysis and simulation prediction.
维普
万方数据