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LS-DYNA Frontal Impact Crashworthiness Engineering

30 Chapters
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01
Frontal impact crashworthiness fundamentals
regulatory and consumer test protocols, injury criteria, and the role of LS-DYNA in vehicle safety development.
crashworthinessregulatory
02
LS-DYNA explicit solver essentials for crash simulation
time integration, stable time step, mass scaling, and energy balance checks.
LS-DYNAexplicit
03
Building a full-vehicle frontal impact model
CAD cleanup, mid-surface and solid meshing, mesh quality targets, and assembly hierarchy.
Buildingfull-vehicle
04
Material modeling for crashworthiness
elastoplastic metals, strain-rate sensitivity, GISSMO and Johnson-Cook damage, and failure calibration.
Materialmodeling
05
Connections and joints in crash models
spot welds, seam welds, adhesives, bolts, and their representation with constrained and tied contact.
Connectionsadhesives
06
Contact definition and control
single surface, automatic surface to surface, tied contact, friction, and penetration control in frontal impacts.
definitionautomatic
07
Boundary conditions and loading
rigid wall setup, initial velocity, gravity, occupant mass representation, and prescribed motion.
Boundaryconditions
08
Full frontal rigid barrier simulation
model setup, run control, and correlation with physical test results.
simulationcorrelation
09
Offset deformable barrier (ODB) simulation
barrier modeling, honeycomb material, and assessment of structural intrusion.
deformableODB
10
Small overlap frontal impact
rigid barrier geometry, wheel and suspension interaction, and countermeasure evaluation.
geometrysuspension
11
Angular and oblique frontal impacts
load path asymmetry, yaw and pitch effects, and model robustness.
asymmetryrobustness
12
Occupant restraint system modeling
airbags, seat belts, pretensioners, and load limiters in LS-DYNA.
Occupantrestraint
13
Occupant safety simulation with LS-DYNA and LS-PrePost
dummy positioning, injury criteria, and restraint tuning.
Occupantsimulation
14
Structural crashworthiness design
front rail, shotgun, bumper beam, and crash box energy absorption.
Structuralcrashworthiness
15
Material and geometry optimization for frontal crash
gauge, grade, and topology studies using LS-OPT.
Materialgeometry
16
Battery electric vehicle frontal crash
battery pack protection, high-voltage safety, and underbody intrusion.
electricprotection
17
Lightweight material frontal crash
aluminum, magnesium, composites, and mixed-material joining simulation.
Lightweightmaterial
18
Pedestrian protection and frontal impact interactions
lower leg, upper leg, and head impactor simulations.
Pedestrianprotection
19
Model validation and correlation
test data acquisition, signal processing, objective rating, and CAE-test reconciliation.
validationcorrelation
20
Mesh sensitivity and convergence in crash simulation
element size, hourglass control, and shell versus solid modeling.
sensitivityconvergence
21
Implicit versus explicit for frontal crash
preload, springback, and hybrid implicit-explicit workflows.
Implicitexplicit
22
Advanced contact and failure
cohesive zone modeling, element deletion, and erosion contact for fracture prediction.
Advancedcohesive
23
Subsystem and component testing simulation
sled tests, component crush tests, and material coupon validation.
Subsystemcomponent
24
DOE and robustness in frontal crash
parameter screening, surrogate models, and reliability-based design.
DOErobustness
25
High-performance computing for crash simulation
parallel scaling, MPP, GPU acceleration, and job monitoring.
High-performancecomputing
26
Post-processing and visualization
LS-PrePost, section forces, intrusion plots, energy histories, and animation review.
Post-processingvisualization
27
Frontal crash CAE workflow automation
scripting, parametric model updates, and batch job submission.
CAEworkflow
28
Regulatory compliance and rating simulation
FMVSS 208, Euro NCAP, C-NCAP, and IIHS frontal protocols.
Regulatorycompliance
29
Case study
full frontal crash model correlation and design iteration for a passenger car.
correlationiteration
30
Case study
small overlap frontal impact countermeasure development and validation using LS-DYNA.
countermeasuredevelopment