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LS-DYNA Vehicle Rollover and Roof Crush Simulation

30 Chapters
View Course Samples Online
01
Introduction to vehicle rollover and roof crush simulation
regulatory drivers, FMVSS 216/216A and ECE R29 standards, and the role of LS-DYNA in occupant safety engineering.
rolloversimulation
02
LS-DYNA solver fundamentals for crashworthiness
explicit time integration, time step control, mass scaling, and contact algorithms relevant to rollover and roof crush.
LS-DYNAcrashworthiness
03
Vehicle body-in-white (BIW) modeling for roof crush
geometry preparation, mid-surfacing, mesh generation, and material assignment for steel and aluminum structures.
body-in-whiteBIW
04
Material constitutive models for roof crush simulation
*MAT_PIECEWISE_LINEAR_PLASTICITY, *MAT_024, strain-rate effects, and failure criteria for sheet metal.
Materialconstitutive
05
Spot weld and structural joint modeling
*MAT_SPOTWELD, *CONSTRAINED_SPOTWELD, adhesive bonding, and their influence on roof strength prediction.
structuralmodeling
06
Boundary conditions and loading for FMVSS 216 roof crush
rigid platen definition, prescribed motion, and reaction force extraction.
Boundaryconditions
07
Contact definition for roof crush
*CONTACT_AUTOMATIC_SINGLE_SURFACE, *CONTACT_AUTOMATIC_SURFACE_TO_SURFACE, and penalty stiffness tuning.
definitionCONTACT
08
Quasi-static roof crush simulation using LS-DYNA
implicit vs. explicit approaches, load curve application, and energy balance verification.
Quasi-staticsimulation
09
Dynamic rollover simulation setup
initial velocity, gravity, ground contact, and *INITIAL_VELOCITY_GENERATION for rollover maneuvers.
rolloversimulation
10
Tire and suspension modeling for rollover
*MAT_SIMPLIFIED_RUBBER, airbag tire models, and suspension kinematics representation.
suspensionmodeling
11
Occupant compartment integrity assessment
intrusion measurement, survival space evaluation, and injury criteria correlation.
Occupantcompartment
12
Dummy and occupant modeling in rollover
Hybrid III and THOR dummy positioning, *CONSTRAINED_INTERPOLATION, and belt/airbag interaction.
occupantmodeling
13
Rollover trigger mechanisms
curb trip, soil trip, and ramp-induced rollover modeling using *RIGIDWALL and *DEFORMABLE_TO_RIGID.
Rollovermechanisms
14
Roof crush post-processing
force-displacement curves, peak force, energy absorption, and comparison with FMVSS 216 targets.
post-processingforce-displacement
15
Mesh convergence and quality checks for roof crush models
element size sensitivity, hourglass control, and *CONTROL_HOURGLASS settings.
convergencesensitivity
16
Validation of roof crush models against physical test data
correlation metrics, force-displacement matching, and model updating techniques.
Validationphysical
17
Parametric study of roof strength
gauge thickness, material grade, and structural geometry effects on roof crush resistance.
Parametricstrength
18
Design optimization for roof crush using LS-OPT
DOE, response surface methods, and multi-objective trade-offs with weight and cost.
optimizationLS-OPT
19
Rollover simulation with vehicle-to-ground interaction
friction coefficients, soil modeling, and *CONTACT_ENTITY for ground contact.
Rolloversimulation
20
Occupant ejection mitigation in rollover
side curtain airbag modeling, *AIRBAG_WANG_NEFSKE, and glazing fracture simulation.
Occupantejection
21
Roof crush simulation of electric vehicles
battery pack integration, underbody stiffness, and unique structural challenges.
simulationelectric
22
Bus and heavy truck rollover simulation
ECE R66 compliance, superstructure modeling, and residual space assessment.
rolloversimulation
23
Advanced material modeling for roof crush
high-strength steel, tailor-welded blanks, and *MAT_037 for strain-rate dependent behavior.
Advancedmaterial
24
Failure and fracture modeling in roof crush
*MAT_ADD_EROSION, GISSMO, and element deletion criteria for tearing prediction.
fracturemodeling
25
Sensitivity and uncertainty quantification in rollover simulation
material scatter, manufacturing variability, and robust design.
Sensitivityuncertainty
26
High-performance computing for large-scale rollover models
MPP parallelization, domain decomposition, and *CONTROL_MPP_DECOMPOSITION.
High-performancecomputing
27
Coupling LS-DYNA with other solvers
co-simulation with Madymo for occupant response and FMVSS 216A dynamic rollover.
CouplingLS-DYNA
28
Case study
full vehicle rollover simulation from a curb trip to rest, including occupant kinematics and injury metrics.
rolloversimulation
29
Case study
roof crush simulation of a pickup truck and SUV, comparing baseline and optimized roof structures.
simulationSUV
30
Best practices and workflow automation
model setup scripts, batch processing, and integration with PLM and CAE data management.
practicesworkflow