Johnson-Cook failure modelGenetic algorithmsHigh-speed ball impactImpact simulationThe Johnson-Cook model, widely used in numerical analysis, is typically derived from split Hopkinson pressure bar tests, which are costly, time-consuming, and challenging to perform consistently. To address this, research...
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)...
[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 ...
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 ...
5.1. Johnson-Cook model As aforementioned, the Johnson-cook model has five material constants which need to be determined by the experimental data. Considering that the three terms in the constitutive equation indicate the effects of strain hardening, strain rate hardening and temperature softening res...
4. Material Model Implementation: In Abaqus, the Johnson-Cookfailure criterion is implemented through a specific material model. The material model incorporates the Johnson-Cook equation and provides a framework to simulate the behavior of materials subjected to high strain rates and elevated temperatures...
The influence of the choice of a set of parameters for the Johnson-Cook constitutive model on the results of an orthogonal cutting model has been studied extensively with twenty different sets of parameters for Ti6Al4V. It results of this study that: Acknowledgements Computational resources have be...
Johnson-cook模型 1. The results of this experimental work were used to define a new set of material constants for the strength component of the Johnson-Cook model for 20# steel. 根据材料在不同应变率下的试验结果,拟合了Johnson-Cook模型中的材料常数,并修正了应变率强化系数C,确定了20号钢的Johnson...
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 ...