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LS-DYNA Vehicle Crash Test Correlation and Model Validation

30 Chapters
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01
Course overview
scope, objectives, and the role of LS-DYNA in vehicle crash test correlation and model validation.
objectivesLS-DYNA
02
Fundamentals of vehicle crashworthiness
crash modes, regulatory and consumer test protocols, and key injury metrics.
crashworthinessregulatory
03
LS-DYNA explicit dynamics solver essentials for crash simulation
time integration, contact algorithms, and hourglass control.
LS-DYNAexplicit
04
Building a full-vehicle finite element model
geometry preparation, meshing strategies, and material model selection.
Buildingfull-vehicle
05
Material characterization and validation for crash
steel, aluminum, plastics, foams, and composites under high strain rates.
Materialcharacterization
06
Joining and connection modeling
spot welds, adhesives, bolts, and their failure criteria in LS-DYNA.
connectionmodeling
07
Barrier and impactor modeling
rigid walls, deformable barriers, and moving deformable barrier (MDB) setups.
impactormodeling
08
Occupant restraint system modeling
airbags, seat belts, pretensioners, and their interaction with the vehicle structure.
Occupantrestraint
09
Sensor and instrumentation modeling
accelerometers, load cells, and displacement measurements for correlation.
instrumentationmodeling
10
Test data acquisition and processing for correlation
filtering, resampling, and signal alignment techniques.
acquisitionprocessing
11
Objective rating methods for crash correlation
CORA, ISO/TS 18571, and other metrics for time-history comparison.
Objectivecorrelation
12
Correlation of full-frontal rigid barrier test
model setup, simulation, and comparison with physical test results.
Correlationfull-frontal
13
Correlation of offset deformable barrier (ODB) test
model adjustments and validation challenges.
Correlationdeformable
14
Correlation of side impact test
moving deformable barrier (MDB) and pole impact scenarios.
Correlationdeformable
15
Correlation of rear impact and low-speed damageability tests
bumper and rear structure validation.
Correlationlow-speed
16
Correlation of roof crush and rollover simulations
quasi-static and dynamic loading conditions.
Correlationrollover
17
Pedestrian protection simulation and correlation
headform, legform, and upper legform impactors.
Pedestrianprotection
18
Calibration of material and failure models using component-level tests
tensile, shear, and crush tests.
Calibrationmaterial
19
Validation of joints and connections through sub-system tests
spot weld pull-out, adhesive peel, and bolt shear.
Validationconnections
20
Sensitivity analysis and uncertainty quantification in crash models
identifying key parameters affecting correlation.
Sensitivityanalysis
21
Optimization techniques for model correlation
parameter identification, DOE, and surrogate-based methods.
Optimizationtechniques
22
Handling variability in physical tests and simulations
statistical correlation and robustness assessment.
Handlingvariability
23
Mesh convergence and discretization effects on correlation accuracy
element size, formulation, and hourglass control.
convergencediscretization
24
Contact and friction modeling effects on crash correlation
penalty stiffness, friction coefficients, and contact thickness.
frictionmodeling
25
Strain rate and failure modeling effects on correlation
dynamic material properties and failure criteria.
modelingcorrelation
26
Correlation of occupant injury metrics
head injury criterion (HIC), chest deflection, and femur loads.
Correlationoccupant
27
Integration of LS-DYNA with other tools
pre-processors, post-processors, and automation scripts for correlation workflows.
IntegrationLS-DYNA
28
Case study
full-vehicle frontal crash correlation and model validation from test to simulation.
full-vehiclecorrelation
29
Case study
side impact correlation and validation for a battery electric vehicle (BEV).
correlationvalidation
30
Best practices, documentation, and reporting for crash model validation
guidelines, checklists, and regulatory acceptance.
practicesdocumentation