One of the most widely used plasticity models for the prediction of material behavior at a high strain rate is the Johnson-Cook (JC) model. However, the model's shortcomings at the strain rates experienced during cold spray lead to inaccuracies in the predictions. Still, it is predominantly ...
Keywords Machining simulation Johnson-Cook material model FEM Downhill-Simplex algorithm View PDFReferences 1 Buchkremer, S. (2015): Predictive tool and process design for efficient chip control in metal cutting. Dissertation: RWTH Aachen Aachen, Germany Google Scholar 2 Shi J., Liu C. The Influe...
一、Johnson-Cook模型公式推导 Johnson-Cook模型由本构方程和损伤模型组成,分别描述材料的塑性变形和断裂行为。 1. 本构方程(应力-应变关系) \sigma = \left( A + B\varepsilon_p^n \right) \left( 1 + C\ln\varepsilon^* \right) \left( 1 - T^m \right) · A,B,n,C,m: 材料参数(304不锈...
Johnson-Cook是一种应用于金属结构的塑性与失效模型,由于形式描述简单,待求参数少,在工程上得到广泛的应用。对于手册上没有给定参数的材料,需要通过对测试数据参数拟合得到核心参数,CurveFitter可以快速精确的计算出参数,并用于后续的有限元分析中。
Johnson-Cook材料模型及失效模型 JC模型的公式是基于实验得到的。JC模型中，流动应力(flowstress)可以表示为以下形式 σ=[A+Bε^n][1+Clnε*][1-T*^m] (1) 式中 σ-effectivestress ε-effectiveplasticstrain ε*-normalizedeffectiveplasticstrainrate(typicallynormalizedtoastrainrateof1.0s-1)...
INTRODUCTION 1 1.1 Purpose 1 1.2 Johnson-Cook Material Model 1 1.3 Johnson-Cook Failure Model 2 2. FAILURE STRAIN PARAMETERS FOR Ti6Al-4V 3 2.1 Ti-6Al-4V Failure Parameter Determination 3 2.2 Scaled Down Ballistic Limit Tests 3 2.3 Split Hopkinson Bar Tests 4 2.4 Ti-6Al-4V Failure ...
Johnson-Cook材料模型及失效模型 JC模型的公式是基于实验得到的。JC模型中，流动应力(flowstress)可以表示为以下形式 σ=[A+Bε^n][1+Clnε*][1-T*^m] (1) 式中 σ-effectivestress ε-effectiveplasticstrain ε*-normalizedeffectiveplasticstrainrate(typicallynormalizedtoastrainrateof1.0s-1)...
Johnson–Cook strength modelJohnson〤ook (JC) high temperature strength material models have been widely used in Finite Element Analysis (FEA) to solve variety of hot rolling problems. In this paper, the temperature and strain rate related parameters of JC model were experimentally calibrated for ...
5 点击界面左侧的【material edit】图标，如图所示，点击create创建新的材料，并在弹出的面板上选择【mechanic】-【damage for ductile metal】-【Johnson-Cook damage】，这个就是Johnson-Cook损伤模型了 6 在Johnson-Cook损伤模型中填入相关的参数，最好采用试验值，这样我们就完成了Johnson-Cook损伤模型的定义 注意...
[2]G.Kay.Failuremodelingoftitanium6Al-4Vandaluminum2024-T3withtheJohnson-Cookmaterialmodel.Tech.Rep.DOT/FAA/AR-03/57.USdepartmentofTransportation,FederalAviationAdministration,September,2003. *MAT_JOHNSON_HOLMQUIST_CERAMICS $MIDROGABCMN ;33800.01.44E+118.0E-017.0E-010.0071.00.37550 ...