Computer Based Grinding Model to Predict Temperature Residual Stress and Phase Transformation Distribution in the Workpiece

这个项目涉及计算机模型的开发 用于表面磨削。 这项研究的目的是预测 加工参数，以最大限度地减少工件损坏， 优化表面质量。 数学模型应该允许 温度场和应力场的计算，任何 热致相变和的幅度 残余应力 该模型考虑了完全耦合的 热机械场方程，通过耦合 摩擦功、塑性功和在摩擦过程中的热释放 能量平衡方程中的任何相变。 一个简单 在先前资助下开发的有限元模型（DMC-8414917） 提供了关于合金钢（AISI 4340）、碳 钢（AISI 1038）和不锈钢（AISI 304），它们在 与实验数据定量一致。 本工作 将改进以前的模型，以提高其适用性， 计算速度和准确性。 将进行参数研究 确定研磨过程的关键工艺参数。 一旦这些计算完成，将尝试 开发第二代计算机模型， 的计算过程和材料性能中使用的 模型 此外，该模型将被扩展到检查 额外的磨削工艺，如多道次和圆柱形 磨

This project deals with the development of a computer model for surface grinding. The goal of this research is to predict the processing parameters in order to minimize workpiece damage and optimize surface quality. The mathematical model should permit calculation of the temperature and stress fields, the extent of any thermally induced phase transformations and the magnitude of the residual stresses. The model considers the fully coupled thermomechanical field equations, with coupling through the dilatational work, the plastic work, and the heat release during any phase transformation in the energy balance equation. A simple finite element model developed under a previous grant (DMC-8414917) provided data on grinding of an alloy steel (AISI 4340), a carbon steel (AISI 1038), and a stainless steel (AISI 304) which are in quantitative agreement with experimental data. The present work will refine the previous model to enhance its applicability, computational speed, and accuracy. Parametric studies will be made to identify critical process parameters of the grinding process. Once these computations are completed, attempts will be made to develop a second generation computer model which will refine both the computational process and the material properties used in the model. In addition, the model will be extended to examine additional grinding processes such as multiple pass and cylindrical grinding.