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LS-DYNA Vehicle Crash Simulation Engineering Case Studies

30 Chapters

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Course overview

scope, objectives, and the role of LS-DYNA in vehicle crash simulation engineering case studies.

objectivesLS-DYNA

LS-DYNA fundamentals for crash simulation

explicit time integration, contact algorithms, and material models relevant to vehicle structures.

LS-DYNAsimulation

Vehicle crash simulation workflow

preprocessing, solver setup, post-processing, and key performance indicators for occupant and structural safety.

simulationworkflow

Full frontal rigid barrier impact case study

model setup, boundary conditions, and validation against physical test data.

boundaryconditions

Offset deformable barrier (ODB) crash simulation

barrier modeling, vehicle deformation, and intrusion assessment.

Side impact pole and MDB crash simulations

door beam behavior, B-pillar deformation, and occupant compartment integrity.

Rear impact crash simulation

fuel system integrity, seat structure response, and whiplash considerations.

simulationintegrity

Roof crush and rollover simulation

quasi-static and dynamic loading, roof strength index, and occupant survival space.

rolloversimulation

Pedestrian protection simulation

head impact, legform impact, and hood deformation using LS-DYNA.

Pedestrianprotection

Small overlap frontal crash simulation

structural load paths, wheel intrusion, and countermeasure design.

simulationstructural

Vehicle-to-vehicle crash simulation

compatibility, mass mismatch, and energy absorption distribution.

Vehicle-to-vehiclesimulation

Battery electric vehicle (BEV) crash simulation

battery pack protection, thermal runaway risk, and structural integration.

Material modeling for crash

steel, aluminum, composites, and strain-rate dependent plasticity in LS-DYNA.

Materialmodeling

Spot weld, adhesive, and bolted joint modeling in vehicle crash simulations

failure criteria and validation.

adhesivemodeling

Airbag and occupant restraint system (ORS) simulation using LS-DYNA

deployment, contact, and injury criteria.

occupantrestraint

Seat belt and pretensioner modeling in crash simulation

belt routing, slip, and occupant kinematics.

pretensionermodeling

Dummy positioning and occupant injury prediction

Hybrid III, THOR, and WorldSID in LS-DYNA.

positioningoccupant

Crash pulse generation and correlation

sled test simulation and acceleration-based validation.

generationcorrelation

Mesh convergence and hourglass control in crash simulation

best practices for accuracy and stability.

convergencehourglass

Contact definition and penetration control in LS-DYNA crash models

penalty, soft constraint, and tied contacts.

definitionpenetration

Mass scaling and time step control for efficient crash simulation

trade-offs and accuracy checks.

efficientsimulation

Implicit vs. explicit solvers for quasi-static and dynamic crash scenarios

selection and hybrid approaches.

Implicitexplicit

Subsystem and component-level crash simulation

bumper, crash box, and energy absorber validation.

Subsystemcomponent-level

Full vehicle model assembly and debugging

common errors, initialization, and run stability.

assemblydebugging

Post-processing and result interpretation

deformation, energy, acceleration, and intrusion plots.

Post-processinginterpretation

Design of experiments (DOE) and optimization in LS-DYNA crash simulation

parametric studies and robustness.

Correlation and validation of simulation with physical crash tests

metrics, tolerances, and CAE sign-off.

Correlationvalidation

Regulatory and consumer test protocols

FMVSS, Euro NCAP, C-NCAP, and their simulation implications.

Regulatoryconsumer

Advanced topics

ALE, SPH, and FSI for crash simulation of fluids and advanced materials.

Capstone project

end-to-end LS-DYNA crash simulation case study from model build to validation report.

Capstoneend-to-end