Welcome to IIUM Repository (IRep) - IIUM Repository (IRep)
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Transcript of Welcome to IIUM Repository (IRep) - IIUM Repository (IRep)
Table of Contents LS-DYNA FOR BEGINNERS ................................................................................................................ 0Disclaimer .............................................................................................................................................. 2
Preface ................................................................................................................................................. 10
CHAPTER 1 .......................................................................................................................................... 11
Introduction
Units
LS PREPOST Versions
ELEMENTS AND FEA MODEL
MATERIAL MODELS
LSPREPOST PAGES
K FILE
COMMON KEYWORDS
Termination time
Contact
d3plot
MAT
PART
Section
RIGIDWALL
BOUNDARY
DEFINE_CURVE
ROTATING A MODEL
ZOOM IN ZOOM OUT
LSDYNA & LSPREPOST INTERNET FORUMS
LSDYNA HELP SITES
CHAPTER 2 .......................................................................................................................................... 16
IMPACT
MODEL MESHING
MATERIAL MODELS
SECTION PROPERTIES
PART
PROJECTILE VELOCITY
CONTACT
FIXING EDGES
END TIME
SHELL THICKNESS VARIATION CALCULATION
GRAPHIC OUTPUT FILES
SAVE THE K FILE
LS-DYNA SOLVER
POST PROCESSING THE RESULTS
CHAPTER 3 .......................................................................................................................................... 23
ROTATING TARGET
POST PROCESSING
CHAPTER 4 .......................................................................................................................................... 29
FRICTION TO HEAT
*DEFINE_CURVE
CHAPTER 5 .......................................................................................................................................... 38
RUBBER MODELING
CHAPTER 6 .......................................................................................................................................... 43
TIE BREAK
DEFINING MATERIALS AND SECTIONS
CREATING NODE SETS
APPLY DISPLACEMENT ONE EDGE
TO CONSTRAIN THE OTHER EDGE
CONSTRAINED_TIE_BREAK
RESULT
Note
CHAPTER 7 .......................................................................................................................................... 47
LEAD PROJECTILE DEFORMATION
CHAPTER 8 .......................................................................................................................................... 50
INTERNAL PRESSURE
MATERIAL
CONSTRAINTS
Note
APPLY PRESSURE
RESULTS
CHAPTER 9 .......................................................................................................................................... 56
METAL CUTTING USING SPH
OVERVIEW
BUILDING THE SPH MODEL
PARTCILE FILLING IN A SHELL BOX
CONTACT
TOOL TRAVERSING
SPH SPECIFIC
RESULTS
CHAPTER 10 ........................................................................................................................................ 62
VIBRATION ANALYSIS
CHAPTER 11 ........................................................................................................................................ 65
IMPACT ON CONCRETE
CHAPTER 12 ........................................................................................................................................ 67
SLOSHING SIMULATION
Water and Air Modeling
Node Merging
Tank Shell Elements
Part-Set Node-Set of Water and Air
Node-Set for Tank Velocity and Constrain
Material selection *MAT
Water & Void Material
Tank Material of Polycarbonate
Section type selection “*SECTION”
Water & Void/Air (*SECTION_SOLID_ALE)
Tank (*SECTION_SHELL)
*EOS_GRUNEISEN
*HOURGLASS
*PART
*DEFINE_CURVE
* INITIAL_VOID_PART
*INITIAL_VELOCITY
*LOAD_BODY_Y
Identifying Reference Nodes for ALE
Identifying the three reference nodes
*ALE
*ALE_REFERENCE_SYSTEM_NODE
*ALE_REFERNCE_SYSTEM_GROUP
*BOUNDARY_PRESCRIBED_MOTION_SET
*BOUNDARY_SPC_SET
*CONSTARINED_LAGRAGE_IN_SOLID
*CONTROL
*CONTROL_ALE
*CONTROL_ENERGY
*CONTROL_TERMINATION
*CONTROL_TIMESTEP
*DATABASE
*DATABASE_OPTION
*DATABASE_BINARY_D3PLOT
*DATABASE_BINARY_FSIFOR
*DATABASE_EXTENT_BINARY
*DATABASE_FSI
Result
CHAPTER 13 ...................................................................................................................................... 103
EFFECT OF EXPLOSION ON A CONCRETE WALL
GENERATING PARTS
SECTION PROPERTIES
MATERIAL PROPERTIES
EQUATIONS OF STATE (EOS)
ALE CARDS
PART SETS
CONSTRAINED_LAGRANGE_IN_SOLID
INITIAL_DETONATION
TIME STEP SIZE
RESULTS
CHAPTER 14 ...................................................................................................................................... 111
LSPREPOST & LSDYNA TIPS
*Interface_Springback_Lsdyna
How to view node and element numbers?
SPH Appearance
SPH PART GENERATION
Refining Mesh
Increasing memory in SPH analysis
SPH particles pass through shell or solid elements
Filling SPH particles as a liquid in a tilted container
Element failure criteria
2D Analysis
*Contact_Tiebreak_Surface_to_Surface
SPH to model foam
Applying Pressure on liquid surface
Generating a new part from a portion of an existing part
OUT OF RANGE VELOCITY IN ALE SIMULATION
HOW TO DISPLAY ELASTIC STRAIN VALUES?
WHEN EOS IS REQUIRED?
*MAT_ADD_EROSION USAGE
HOW TO USE MAT_084?
HIGH VELOCITY IMPACT
HEB AND AIR MODELING
COMBATTING INSTABILITY IN ALE
USING *MAT_CONCRETE_DAMAGE_REL3 (MAT_072 R3)
USING *CONSTRAINED_NODAL_RIGID_BODY
USING ELASTIC_PLASTIC_HYDRO MATERIAL
HOW TO DISPLAY STRAIN IN VECTOR FORM?
NECESSARY INPUT TO EXTRACT VIBRATION MODES
HOLE FILL WITH SHELL ELEMENTS
IN POST PROCESSING WHAT DOES PRESSURE MEAN?
NOTE ON JOHNSON COOK MATERIAL MODEL
PATH PLOT
HOW TO ERASE ELEMENTS BUT KEEP THE SURFACES TO REMESH AGAIN
FULLY INTEGRATED SHELL ELEMENTS
FILE GLSTAT
FILE MATSUM
VIEWING CONTACT FRICTIONAL ENERGY[*]
HOW TO CONNECT SPH PART TO SOLID ELEMENT PART
CHAPTER 15 ...................................................................................................................................... 125
USAGE of LOAD BLAST ENHANCED
MATERIAL PROPERTIES
SECTION PROPERTIES
BOUNDARY CONDITIONS
TERMINATION TIME & TIME STEP
*LOAD_BLAST_ENHANCED
*LOAD_BLAST_SEGMENT_SET
UN-REFERENCED CURVES
DATABASE_BINARY_BLSTFOR
PARTIAL INPUT
CHAPTER 16 ...................................................................................................................................... 129
Spot Weld
CHAPTER 17 ...................................................................................................................................... 132
LS-DYNA MATERIAL MODELS ........................................................................................................ 132
MAT_SOIL_AND_FOAM_FAILURE (*MAT_005)
MAT_HIGH_EXPLOSIVE_BURN (*MAT_008) C4
EOS_JWL
CHAPTER 18 ...................................................................................................................................... 136INITIAL VOLUME FRACTION ........................................................................................................... 137
References......................................................................................................................................... 144
