Abaqus中:Property—Mechanical—Damage for Ductile Matals—Johnson-Cook Damage 输入上述韧性准则模型相关参数即可确定损伤起点C。 Suboptions-Damage Evolution: 确定损伤演化规律(能量或位移),软化形式(线性表格或指数)对应能量或位移值即可。
再看abaqus里面关于Johnson-Cookdamageinitiation的定义equivalentplasticstrainattheonsetofdamage,,isassume如果d3取正值,按照abaqus的定义,应力三轴度η几乎总是负值,则-d3*η几乎大部分情况取正,以AISI4340为例,d1=0.05,d2=3.44,d3=2.12(d3本来是-2.12,但按照abaqus里面的定义,理论上要取相反数),d4=0.002,d...
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...
M. Akbari, S. Buhl, C. Leinenbach, K. Wegener, A new value for Johnson Cook damage limit criterion in machining with large negative rake angle as ba- sis for understanding of grinding, J Mater Process Technol 234 (2016) 58-71.
再看abaqus里面关于Johnson-Cook damage initiation的定义equivalent plastic strain at the onset of damage,, is assume 如果d3取正值,按照abaqus的定义,应力三轴度η几乎总是负值,则-d3*η几乎大部分情况取正, 以AISI 4340为例, d1=0.05, d2=3.44, d3=2.12(d3本来是-2.12,但按照abaqus里面的定义,理论上...
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...
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...
The target material behavior was modeled by the Johnson–Cook material model that induced both plastic deformation and damage mechanism. Good agreement was obtained between the experimental measurements and numerical predictions for all testing conditions....
在plastic里面选Johnson-Cook,你说的这个是Damage里面的Johnson-Cook