关键词:航空发动机,风扇/压气机,叶片,硬物损伤,数值模拟,本构模型,失效模型,参数估计基于Johnson-Cook模型的硬物损伤数值模拟研究・II・ABSTRACTForeignobjectdamage(FOD)eventstofan/compressorbladesoftenoccurduringtheoperationofaeroengine.Theyareverydangeroustotheflyingsaftyofaeroengineandaircraft.NumericalmodelingofFOD...
2 JC本构——损伤演化段 The Johnson-Cook criterion (available only in Abaqus/Explicit) is a special case of the ductile criterion in which the equivalent plastic strain at the onset of damage, , is assumed to be of the form 上面的英文是帮助文档中对于 Johnson-Cook 损伤准则的解释,具体意思:下...
et a1.Determination of Holmquist—Johnson—Cook model parameters for sandstone[J].Journal of China Coal Society,2018,43(8):221卜 2216.doi:10.13225/j.cnki.jCOS.2017.1305 砂岩 Holmquist--Johnson--Cook 模型参数确定 凌天龙 ,吴帅峰 ,刘殿书 ,梁书锋 ,李晨 ,马建会 (1.中国矿业 大学 (北京 )力学...
In the Johnson-Cook damage model, there are five material constants viz. D1, D2, D3, D4 and D5, and it is very difficult to find out all of these material constants by experiments. The main objective of the present research is to determine the most sensitive parameter out of these ...
johnson-cook damage损伤断裂模型,模拟试样拉伸至断裂的过程,该模型主要设置好5个失效参数d1-d5,熔点温度,转变温度,参考应变率。损伤演化(类型:位移;软化:线性;退化:最大;位移失效:xx。将附件中已设置好的inp,直接导入到ABAQUS中提交运算。 以下内容为付费内容,请购买后观看...
Cook plasticity uses a particular analytical form as the hardening law.The evolution of the yield stress is described by the following expression: where A, B, n, and m are material parameters and is a nondimensional temperature.The material parameters for the Johnson-Cook plasticity model cannot...
The measured crater was compared with that predicted by the corresponding finite element model developed using the finite element code Abaqus/Explicit. The target material behavior was modeled by the Johnson–Cook material model that induced both plastic deformation and damage mechanism. Good agreement ...
The alteration, or optimization of model parameters is necessary if cutting and experiment conditions differ, if one wishes to obtain applicable results. In this work, the authors aim to present a method of optimizing the Johnson-Cook constitutive model parameters to obtain a better fit with ...
Ti-6Al-4V合金高速切削仿真Johnson-Cook本构参数优化
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