Tool-based inverse determination of material model of Direct Aged Alloy 718 for FEM cutting simulation
Tool-based inverse determination of material model of Direct Aged Alloy 718 for FEM cutting simulation
复制标题
基于工具的直接时效合金 718 材料模型的反确定，用于 FEM 切削模拟
DOI：
10.1016/j.procir.2018.08.211
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
S.A.M.
中科院分区：
文献类型：
--
作者：
Klocke;Döbbeler;Schneider;S.A.M.
直接时效合金（DA 718）已广泛应用于航空发动机零部件.对DA 718的切削过程进行有限元模拟，可以预测切削力和温度对加工过程的可靠性。然而，由于剪切区的高应变、高应变速率和高温度，获得用于切削仿真的材料和摩擦模型仍然是一个挑战。本文采用欧拉-拉格朗日耦合（CEL）有限元模型对DA 718正交切削的切削力和切屑形状进行了预测。为了获得FE模型的材料和摩擦模型，应用了用于逆确定Johnson-Cook（JC）材料模型和温度相关摩擦模型的方法。用Matlab编写了一个软件工具来自动化这种方法。利用该软件在拉床试验台上对硬质合金刀具与DA 718之间的摩擦行为进行了试验和仿真研究。建立了刀-屑界面温度相关摩擦模型。通过对DA 718正交切削力、切屑压缩比和锯齿比的实验和仿真结果的比较，反求出了JC材料本构关系和JC损伤模型的参数。确定材料和摩擦模型的有限元模型进行了验证，在不同的切削速度和进给量的切削力和切屑的形式在正交切削。
Direct aged Alloy (DA 718) has been widely used for aircraft engine components. FE-simulation of the cutting process of DA 718 can predict the process reliability regarding to the cutting force and the temperature. However, obtaining material and friction model for cutting simulation is still a challenge due to high strain, strain rate and temperature in shear zone. In this paper, a Coupled Eulerian-Lagrangian (CEL) FE-model has been applied to predict the cutting force and chip form in orthogonal cutting of DA 718. In order to obtain the material and friction model for the FE-model, an approach for inverse determination of the Johnson-Cook (JC) material model and the temperature-dependent friction model was applied. A software tool was programmed with Matlab to automatize this approach. By means of this software tool, experimental and simulative investigations of the friction behavior between carbide tool and DA 718 were conducted on a test bench on a broaching machine. A temperature-dependent friction model in tool-chip interface was determined. The parameters of the JC-material constitutive law and the JC-damage model were inverse determined by comparison of experimental and simulative results of cutting force, chip compression ratio and serration ratio in orthogonal cutting of DA 718. The FE-model with determined material and friction model was validated at different cutting speeds and feed rates with respect to cutting force and chip forms in orthogonal cutting.
影响因子：
4.1
作者：
Biermann, D.;Oezkaya, E.
通讯作者：
Oezkaya, E.