Modeling Fracture And Failure With Abaqus - Dassault Systèmes
Modeling Fracture and Failure with AbaqusAbaqus 2018
About this CourseCourse objectivesUpon completion of this course you will be able to:Use proper modeling techniques to capture crack-tip singularities in fracture mechanics problemsUse Abaqus/CAE to create meshes appropriate for fracture studiesCalculate stress intensity factors and contour integrals around a crack tipSimulate material damage and failureSimulate crack growth using cohesive behavior, VCCT, and XFEMSimulate low-cycle fatigue crack growthTargeted audienceSimulation AnalystsPrerequisitesThis course is recommended for engineers with experience using Abaqus3 days
Day 1Lecture 1Basic Concepts of Fracture MechanicsLecture 2Fracture Analysis of Sharp CracksWorkshop 1Lecture 3Workshop 2Crack in a Three-point Bend SpecimenGeneral Fracture AnalysisCrack in a Helicopter Airframe Component
Day 2Lecture 4Material Failure and WearLecture 5Element-based Cohesive BehaviorWorkshop 3Crack Growth in a Three-point Bend Specimen using Cohesive Connections (Part 1)Workshop 4Crack Growth in a Helicopter Airframe Component using Cohesive ElementsLecture 6Workshop 3Surface-based Cohesive BehaviorCrack Growth in a Three-point Bend Specimen using Cohesive Connections (Part 2)
Day 3Lecture 7Workshop 5Virtual Crack Closure Technology (VCCT)Crack Growth in a Three-point Bend Specimen using VCCTLecture 8Low-cycle FatigueLecture 9Mesh-independent Fracture Modeling (XFEM)Workshop 6Crack Growth in a Three-point Bend Specimen using XFEMWorkshop 7Modeling Crack Propagation in a Pressure Vessel with Abaqus using XFEM
Additional MaterialAppendix 1Other Fracture Mechanics TechniquesAppendix 2Focused Mesh with Keywords
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Revision StatusLecture 111/17Updated for Abaqus 2018Lecture 211/17Updated for Abaqus 2018Lecture 311/17Updated for Abaqus 2018Lecture 411/17Updated for Abaqus 2018Lecture 511/17Updated for Abaqus 2018Lecture 611/17Updated for Abaqus 2018Lecture 711/17Updated for Abaqus 2018Lecture 811/17Updated for Abaqus 2018Lecture 911/17Updated for Abaqus 2018Appendix 111/17Updated for Abaqus 2018Appendix 211/17Updated for Abaqus 2018Workshop 111/17Updated for Abaqus 2018Workshop 211/17Updated for Abaqus 2018Workshop 311/17Updated for Abaqus 2018Workshop 411/17Updated for Abaqus 2018Workshop 511/17Updated for Abaqus 2018Workshop 611/17Updated for Abaqus 2018Workshop 711/17Updated for Abaqus 2018
Lesson 1: Basic Concepts of Fracture Mechanicswww.3ds.com Dassault SystèmesLesson content:IntroductionFracture MechanismsLinear Elastic Fracture MechanicsSmall Scale YieldingEnergy ConsiderationsThe J-integralMixed-Mode FractureFatigueOther Techniques1 hourL1.1
Lesson 2: Fracture Analysis of Sharp Crackswww.3ds.com Dassault SystèmesLesson content:Crack Modeling OverviewModeling Sharp Cracks in Two DimensionsModeling Sharp Cracks in Three DimensionsCalculation of Contour IntegralsExamplesPenny-shaped crack in an infinite spaceConical crack in a half-spaceCompact Tension SpecimenWorkshop PreliminariesWorkshop 1: Crack in a Three-point Bend Specimen2.5 hoursL2.1
Lesson 3: General Fracture Analysiswww.3ds.com Dassault SystèmesLesson content:Finite-Strain Analysis of Crack TipsLimitations of 3D Swept Meshing for FractureModeling Cracks with Keyword OptionsNodal Normals in Contour Integral CalculationsJ-Integrals at Multiple Crack TipsThrough Cracks in ShellsMixed-Mode FractureMaterial DiscontinuitiesNumerical Calculations with Elastic-Plastic MaterialsResidual StressesWorkshop 2: Crack in a Helicopter Airframe Component2 hoursL3.1
Lesson 4: Material Failure and Wearwww.3ds.com Dassault SystèmesLesson content:Progressive Damage and FailureDamage Initiation Criteria for Ductile MetalsDamage EvolutionElement RemovalDamage in Fiber-Reinforced Composite MaterialsDamage in FastenersMaterial Wear and Ablation2 hoursL4.1
Lesson 5: Element-based Cohesive Behaviorwww.3ds.com Dassault SystèmesLesson content:OverviewIntroductionElement TechnologyConstitutive ResponseViscous RegularizationModeling TechniquesExamplesWorkshop 3: Crack Growth in a Three-point Bend Specimen using Cohesive Connections(Part 1)Workshop 4: Crack Growth in a Helicopter Airframe Component using Cohesive Elements3 hoursL5.1
Lesson 6: Surface-based Cohesive BehaviorLesson content:www.3ds.com Dassault SystèmesSurface-based Cohesive BehaviorElement- vs. Surface-based Cohesive BehaviorWorkshop 3: Crack Growth in a Three-point Bend Specimen using Cohesive Connections(Part 2)1.5 hoursL6.1
Lesson 7: Virtual Crack Closure Technique (VCCT)www.3ds.com Dassault SystèmesLesson content:IntroductionVCCT CriterionLEFM Example using Abaqus/StandardLEFM Example using Abaqus/ExplicitOutputDuctile Fracture with VCCTVCCT Plug-inComparison with Cohesive BehaviorExamplesWorkshop 5: Crack Growth in a Three-point Bend Specimen using VCCT2 hoursL7.1
Lesson 8: Low-cycle FatigueLesson content:www.3ds.com Dassault SystèmesIntroductionLow-cycle Fatigue in Bulk MaterialsLow-cycle Fatigue at Material Interfaces1 hourL8.1
Lesson 9: Mesh-independent Fracture Modeling (XFEM)L9.1www.3ds.com Dassault SystèmesLesson content:IntroductionBasic XFEM ConceptsContact Modeling with XFEMDamage ModelingCohesive Damage ModelingLEFM-based Damage ModelingCreating an XFEM Fracture ModelExample 1 – Crack Initiation and Propagation usingCohesive DamageExample 2 – Crack Initiation and Propagation usingLEFMExample 3 – Low Cycle FatigueExample 4 – Propagation of an Existing CrackExample 5 – Delamination and Through-thicknessCrack PropagationExample 6 – Contour Integrals3 hoursExample 7 – Pressure PenetrationModeling TipsLimitationsWorkshop 6: Crack Growth in a Three-point BendSpecimen using XFEMWorkshop 7: Modeling Crack Propagation in aPressure Vessel with Abaqus using XFEM
Appendix 1: Other Fracture Mechanics TechniquesAppendix content:www.3ds.com Dassault SystèmesNonlinear Fracture MechanicsCreep FractureInterfacial Fracture0.5 hoursA1.1
Appendix 2: Focused Mesh with KeywordsAppendix content:www.3ds.com Dassault SystèmesGenerate a Focused Mesh with Keyword Options15 minutesA2.1
Use proper modeling techniques to capture crack -tip singularities in fracture mechanics problems Use Abaqus/CAE to create meshes appropriate for fracture studies Calculate stress intensity factors and contour integrals around a crack tip Simulate material damage and failure Simulate crack growth using cohesive behavior, VCCT, and XFEM .
A.2 ASTM fracture toughness values 76 A.3 HDPE fracture toughness results by razor cut depth 77 A.4 PC fracture toughness results by razor cut depth 78 A.5 Fracture toughness values, with 4-point bend fixture and toughness tool. . 79 A.6 Fracture toughness values by fracture surface, .020" RC 80 A.7 Fracture toughness values by fracture surface .
Fracture Liaison/ investigation, treatment and follow-up- prevents further fracture Glasgow FLS 2000-2010 Patients with fragility fracture assessed 50,000 Hip fracture rates -7.3% England hip fracture rates 17% Effective Secondary Prevention of Fragility Fractures: Clinical Standards for Fracture Liaison Services: National Osteoporosis .
Fracture is defined as the separation of a material into pieces due to an applied stress. Based on the ability of materials to undergo plastic deformation before the fracture, two types of fracture can be observed: ductile and brittle fracture.1,2 In ductile fracture, materials have extensive plastic
the Brittle Fracture Problem Fracture is the separation of a solid body into two or more pieces under the action of stress. Fracture can be classified into two broad categories: ductile fracture and brittle fracture. As shown in the Fig. 2 comparison, ductile fractures are characterized by extensive plastic deformation prior to and during crack
6.4 Fracture of zinc 166 6.5 River lines on calcite 171 6.6 Interpretation of interference patterns on fracture surfaces 175 6.6.1 Interference at blisters and wedges 176 6.6.2 Interference at fracture surfaces of polymers that have crazed 178 6.6.3 Transient fracture surface features 180 6.7 Block fracture of gallium arsenide 180
Fracture control/Fracture Propagation in Pipelines . Fracture control is an integral part of the design of a pipeline, and is required to minimise both the likelihood of failures occurring (fracture initiation control) and to prevent or arrest long running brittle or ductile fractures (fracture propagation control).
on the fracture increases, the contact area between the two fracture surfaces also increases, increasing the sti -ness of the fracture. Fracture specific sti ness depends on the elastic properties of the rock and depends criti-cally on the amount and distribution of contact area in a fracture that arises from two rough surfaces in contact
This article shows how the fracture energy of concrete, as well as other fracture parameters such as the effective length of the fracture process zone, critical crack-tip opening displacement and the fracture toughness, can be approximately predicted from the standard . Asymptotic analysis further showed that the fracture model based on the .
