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ID:39344215
大小:522.11 KB
页数:52页
时间:2019-07-01
《《ABAQUS单元选择》PPT课件》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、ElementSelectionCriteriaAppendix1ABAQUS/Standard基础教程内容提要ElementsinABAQUSStructuralElements(ShellsandBeams)vs.ContinuumElementsModelingBendingUsingContinuumElements用实体单元模拟弯曲StressConcentrations应力集中Contact接触IncompressibleMaterials不可压缩材料MeshGeneration网格生成SolidElementSelectionSummaryABAQUS/Standard基础教
2、程ElementsinABAQUSABAQUS/Standard基础教程ElementsinABAQUSABAQUS单元库中提供广泛的单元类型,适应不同的结构和几何特征ThewiderangeofelementsintheABAQUSelementlibraryprovidesflexibilityinmodelingdifferentgeometriesandstructures.Eachelementcanbecharacterizedbyconsideringthefollowing:单元特性:Family单元类型Numberofnodes节点数Degreesoffreedom自由度
3、数Formulation公式Integration积分ABAQUS/Standard基础教程单元类型(Family)Afamilyoffiniteelementsisthebroadestcategoryusedtoclassifyelements.同类型单元有很多相同的基本特。Elementsinthesamefamilysharemanybasicfeatures.同种类单元又有很多变化:Therearemanyvariationswithinafamily.ElementsinABAQUSspecial-purposeelementslikesprings,dashpots,andm
4、assescontinuum(solidelements)shellelementsbeamelementsrigidelementsmembraneelementstrusselementsinfiniteelementsABAQUS/Standard基础教程ElementsinABAQUSNumberofnodes节点数(interpolation)Anelement’snumberofnodesdetermineshowthenodaldegreesoffreedomwillbeinterpolatedoverthedomainoftheelement.ABAQUSincludese
5、lementswithbothfirst-andsecond-orderinterpolation.插值函数阶数可以为一次或者两次First-orderinterpolationSecond-orderinterpolationABAQUS/Standard基础教程ElementsinABAQUS自由度数目DegreesoffreedomTheprimaryvariablesthatexistatthenodesofanelementarethedegreesoffreedominthefiniteelementanalysis.Examplesofdegreesoffreedomare:
6、Displacements位移Rotations转角Temperature温度Electricalpotential电势ABAQUS/Standard基础教程公式FormulationThemathematicalformulationusedtodescribethebehaviorofanelementisanotherbroadcategorythatisusedtoclassifyelements.Examplesofdifferentelementformulations:Planestrain平面应变Planestress平面应力Hybridelements杂交单元Incomp
7、atible-modeelements非协调元Small-strainshells小应变壳元Finite-strainshells有限应变壳元Thickshells后壳Thinshells薄壳ElementsinABAQUSABAQUS/Standard基础教程积分Integration单元的刚度和质量在单元内的采样点进行数值计算,这些采样点叫做“积分点”Thestiffnessandmassofanelementare
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