Abaqus：Abaqus疲勞與斷裂分析技術(shù)教程.Tex

1Abaqus:Abaqus疲勞與斷裂分析技術(shù)教程1Abaqus:疲勞與斷裂分析教程等，以及斷裂力學(xué)分析，如J積分、CTOD(裂紋尖端開口位移)和G值(能量在Abaqus中，疲勞分析通?；赟-N曲線(應(yīng)力-壽命曲線)進(jìn)行。S-N曲fromabaqusConstant2#創(chuàng)建材料屬性material=session.odbs['myModel.odb'].matstressLifeTable=((100,1e6),(200,1e5),(temperatureDependen)3J積分是評估裂紋尖端能量釋放率的一種方法，是斷裂力學(xué)分析中的關(guān)鍵參數(shù)。在數(shù)。在Abaqus中，可以使用J積分來預(yù)測裂紋的擴(kuò)展路徑和速度。fromabaqusConstantsimpoodb=session.openOdb(name='m#獲取裂紋尖端節(jié)點(diǎn)CTOD是衡量裂紋尖端位移的指標(biāo)，對于評估裂紋擴(kuò)展的臨界條件非常重要。fromabaqusConstantsimpo#創(chuàng)建裂紋面crackSurface=session.odbs['myModel.odb'].rootAssembly.#計(jì)算CTOD1.3.3G值(能量釋放率)G值是裂紋擴(kuò)展的能量指標(biāo)，反映了裂紋擴(kuò)展所需的能量。在Abaqus中，G值可以通過J積分或直接定義的斷裂韌性來計(jì)算。4fromabaqusConstantsim1.4結(jié)論2.1基礎(chǔ)設(shè)置fromabaqusConstantsimpo5fromfromjobimport*#創(chuàng)建一個(gè)新部件g,v,d,c=s.geometry,s.vertices,s.dimensions,s.#定義矩形板的尺寸#創(chuàng)建部件p=mdb.models['Model-1'].parts#選擇要劃分的面#選擇要劃分的面#定義網(wǎng)格尺寸#劃分網(wǎng)格#創(chuàng)建材料mdb.models['Model-1'].Materialmdb.models['Model-1'].materials['Steel'].Elastic(table=6加力：#創(chuàng)建邊界條件#創(chuàng)建載荷用于計(jì)算在不同應(yīng)力水平下的損傷累積。N數(shù)據(jù)來定義材料的疲勞特性。應(yīng)力幅S次數(shù)N7應(yīng)力幅S循環(huán)次數(shù)N000的線性疊加。損傷累積可以通過以下公式計(jì)算：平下的材料疲勞壽命。3.2設(shè)置疲勞分析參數(shù)載荷循環(huán)、損傷累積準(zhǔn)則等。在Abaqus中，可以通過以下步驟定義材料的疲勞特性：1.在材料模塊中選擇材料。2.定義材料的S-N曲線。3.設(shè)置材料的疲勞損傷模型。#定義材料的#定義材料的S-N曲線8myMaterialmyMaterial=mdb.models['Model-1'].m#定義S-N數(shù)據(jù)snData=((100,1000000),(150,500000),(200,200000),(25#設(shè)置疲勞損傷模型的循環(huán)次數(shù)。#定義載荷循環(huán)#定義載荷循環(huán)fromabaqusConstantsim#創(chuàng)建載荷循環(huán))執(zhí)行疲勞分析需要在Abaqus中創(chuàng)建分析步，并設(shè)置相應(yīng)的疲勞分析選項(xiàng)。示例代碼#創(chuàng)建分析步#創(chuàng)建分析步fromabaqusConstantsim9#創(chuàng)建疲勞分析步#設(shè)置疲勞分析選項(xiàng)疲勞分析的結(jié)果通常包括損傷累積、疲勞壽命預(yù)測等。在Abaqus中，可以fromabaqusConstantsim#打開結(jié)果文件#獲取損傷累積結(jié)果#顯示結(jié)果)通過以上步驟，可以詳細(xì)地在Abaqus中進(jìn)行疲勞分析，從理論理解到參數(shù)fromabaqusConstantsim#創(chuàng)建模型#定義材料屬性#創(chuàng)建裂紋point1=(0.0,0.0,0.0),point2#設(shè)置分析步#定義裂紋擴(kuò)展準(zhǔn)則#設(shè)置輸出請求#運(yùn)行分析['Job-1'].waitForCompletion()4.3.1示例解釋5.1復(fù)合材料疲勞分析5.1.1原理5.1.2內(nèi)容示例#創(chuàng)建復(fù)合材料層session.viewports['Viewport:1'].setValues(displayedObject=None)session.Viewport(name='Viewport:1',origin=(0.0,0.0),width=128.0,session.viewports['Viewport:1'].makeCurrent()session.viewports['Viesession.viewports['Viewport:1'].partDisplay.setValuessession.viewports['Viewport:1'].partDisplasession.viewports['Viewport:1'].partDisplay.session.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=OFF,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setVsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=OFF,engisession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setVsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=OFF,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setVsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].psession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].psession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setVsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmesession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=OFF,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setVsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].psession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].psession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setVsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmesession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=OFF,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setVsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].psession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].psession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setVsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmesession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=OFF,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setVsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].psession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].psession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setVsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmesession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=OFF,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setVsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].psession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].psession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setVsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmesession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=OFF,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setVsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].psession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].psession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssigsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setVsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignments=ON,engineeringFeatsession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmesession.viewports['Viewport:1'].partDisplay.setValues(sectionAssignmentssession.viewports['Viewport:1'].partDisplay.setValues(sectionAssig#結(jié)果解釋與優(yōu)化###應(yīng)力和應(yīng)變-**應(yīng)變**:應(yīng)變結(jié)果包括彈性應(yīng)變、塑性應(yīng)變和總應(yīng)變。在疲勞分析中，應(yīng)關(guān)注彈性應(yīng)###疲勞壽命預(yù)測次數(shù)之間的關(guān)系，而W?hler曲線則是在特定應(yīng)力比下，應(yīng)力幅度與循環(huán)次數(shù)的關(guān)系。預(yù)測###損傷累積Abaqus采用Palmgren-Miner線性損傷累積理論來評估損傷。該理論認(rèn)為，當(dāng)損傷累積達(dá)到###J積分#打開#打開ODB文件#獲取疲勞損傷結(jié)果#計(jì)算損傷值#輸出最大損傷值#關(guān)閉ODB文件fromabaqusConstantsim#創(chuàng)建新的梁模型#修改梁中部的厚度mdb.models['Model-1'].sketches['__profile__'].rectangle(point1=(40.0,0.0#保存模型可以顯著提高結(jié)構(gòu)的耐久性和安全性。通常涉及對材料的循環(huán)應(yīng)力和應(yīng)變進(jìn)行評估，以預(yù)測結(jié)構(gòu)的壽命。此過程包括線性彈性分析用于確定結(jié)構(gòu)在靜態(tài)和動態(tài)載荷下的響應(yīng)。在飛機(jī)結(jié)構(gòu)中，這包括機(jī)身、機(jī)翼、起落架等部件在飛行過這包括機(jī)身、機(jī)翼、起落架等部件在飛行過程中的應(yīng)力和應(yīng)變分布。fromabaqusConstantsimmdb.models[modelName].#Assignmaterialtopmdb.models[modelName].DisplacementBC(name='BC-1',createStepName='Imodels[modelName].parts['Wing'].sets['Set-2'],u1=0.0,u2=0.0,u3=0.0,ur1=0.0,ur2=0.0,urmdb.models[modelName].ConcentratedForce(name='Load-1',creatmdb.models[modeIName].parts['Wing'].sets['Set-3'],cf1=10000.0,cf2=0.0,ype=UNIFORM,field=",localCsymdb.models[modelName].parts['Wing'].seedPart(size=10.0,deviationFactor=0.1,minmdb.models[modelName].parts['Wing'].g#CreateajobandsubmjobName='AircraftWingAnalysis'mdb.Job(name=jobName,model=modelName,description=",type=ANALYtMinutes=0,waitHours=0,queue=None,omAnalysis=True,explicitPrecision=SINGLE,nodalOutputPrecision=SINGLE,echoPPrint=OFF,contactPrint=OFF,historyPrint=OFF,userSubroutine=",scra[jobName].wai#Abaqus/CAEScriptingExample:DynamicLoad#Abaqus/CAEScriptingExample:DynamicLoadAnalysisfromabaqusConstantsimpomdb.models[modelName].materials['Concrete'].Elastic(table=((30e9,0.#Createapartmdb.models[modelName].ConstrainedSketcmdb.models[modelName].sketches['_profile_'].Line(point1=(0.0,0.0),mdb.models[modelName].parts['BridgeDeck'].BaseShell(sketch=mdb.models[modelmdb.models[modeIName].HomogeneousSolidSection(name='BridgeSection',material='Concretemdb.models[modelName].parts['BridgeDeck'].SectionAssignme].parts['BridgeDeck'].sets['Set-1'],sectionName=mdb.models[modelName].DisplacementBC(name='BC-1',createStepName='Imodels[modelName].parts['BridgeDeck'].sets['Set-2'],u1=0.0,u2=0.0,u3mdb.models[modelName].ConcentratedForce(name='Load-1',createStepName='Step-1',region=mdb.models[modelName].parts['BridgeDeck'].sets['Set-3'],cf1=10000.0,cfutionType=UNIFORM,field="mdb.models[modelName].StaticStep(namecc=1000,stabilizationMethod=DAMPING_FACTOR,stabmdb.models[modelName].parts['BridgeDeck'].seedParactor=0.1)mdb.models[modelName].parts['BridgeDeck'].generateMesh()#CreateajobandsubmitjobName='BridgeAnalysis'mdb.Job(name=jobName