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MADYMO Curtain Airbag Modeling and Validation

30 Chapters
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01
Introduction to MADYMO for curtain airbag engineering
overview of the solver, explicit time integration, and typical CAE workflow for occupant safety.
MADYMOexplicit
02
Curtain airbag system fundamentals
design drivers, packaging constraints, inflation strategies, and regulatory and consumer test requirements.
packagingconstraints
03
MADYMO model setup for curtain airbags
project structure, unit systems, coordinate frames, and input deck organization for repeatable simulations.
MADYMOstructure
04
Gas dynamics modeling in MADYMO
uniform pressure, hybrid gas particle, and CFD-based approaches for curtain airbag inflation.
dynamicsmodeling
05
Inflator characterization and gas properties
tank tests, mass flow rate curves, temperature effects, and mapping to MADYMO gas definitions.
Inflatorcharacterization
06
Airbag fabric and material modeling
orthotropic shell properties, permeability, leakage, and strain-rate effects for coated and uncoated fabrics.
materialmodeling
07
Curtain airbag geometry creation and meshing
CAD import, mid-surface extraction, mesh quality criteria, and seam line representation.
geometrycreation
08
Folding and packaging techniques in MADYMO
fold line definitions, initial metric method, and pre-simulation for packaged state.
packagingtechniques
09
Contact modeling for curtain airbags
self-contact, contact with occupant, interior trim, and seat structures using MADYMO contact types.
modelingself-contact
10
Occupant positioning and dummy models
Hybrid III, THOR, and WorldSID setup for side impact and rollover curtain airbag assessments.
Occupantpositioning
11
Side impact load cases
moving deformable barrier, pole, and vehicle-to-vehicle scenarios with curtain airbag deployment timing.
deformablevehicle-to-vehicle
12
Rollover and ejection mitigation
FMVSS 226 and global protocols, curtain airbag coverage, and occupant retention simulation strategies.
Rolloverejection
13
Out-of-position (OOP) occupant modeling
low-risk deployment requirements, static and dynamic OOP tests, and MADYMO simulation setup.
Out-of-positionOOP
14
Inflation timing and trigger strategies
sensor signals, deployment time, and coupling with MADYMO time-step control.
Inflationstrategies
15
Fluid-structure interaction (FSI) in curtain airbags
coupling gas flow with fabric deformation, stability, and convergence tips.
Fluid-structureinteraction
16
Validation fundamentals
correlation metrics, test data acquisition, and objective rating methods for curtain airbag simulations.
Validationcorrelation
17
Component-level validation
inflator tank tests, fabric permeability tests, and seam strength validation in MADYMO.
Component-levelvalidation
18
Subsystem validation
static deployment tests, drop tower tests, and fixture-based curtain airbag validation.
Subsystemvalidation
19
Full-vehicle validation
sled tests, barrier tests, and rollover rig comparisons with MADYMO predictions.
Full-vehiclevalidation
20
Occupant injury criteria
HIC, BrIC, chest deflection, and other metrics for side impact and rollover curtain airbag evaluation.
Occupantcriteria
21
Parametric studies and design of experiments
sensitivity analysis of inflator output, venting, fabric permeability, and fold pattern.
Parametricexperiments
22
Optimization of curtain airbag performance
surrogate models, multi-objective optimization, and robust design using MADYMO.
Optimizationperformance
23
Advanced material modeling
anisotropic hyperelastic fabrics, temperature and strain-rate dependence, and failure criteria.
Advancedmaterial
24
Advanced gas modeling
detailed CFD inflator models, gas mixture effects, and coupling with MADYMO gas particle method.
Advancedmodeling
25
Numerical stability and troubleshooting
time-step issues, contact instabilities, negative volumes, and energy balance checks.
Numericalstability
26
Computational efficiency
mass scaling, subcycling, parallel processing, and model simplification for large curtain airbag models.
Computationalefficiency
27
Integration with other solvers
co-simulation with LS-DYNA, coupling with occupant safety tools, and data exchange formats.
Integrationco-simulation
28
Regulatory and consumer testing updates
latest FMVSS, ECE, Euro NCAP, and C-NCAP requirements for curtain airbags.
Regulatoryconsumer
29
Case study
side impact curtain airbag validation for a sedan — model build, correlation, and design improvements.
validationcorrelation
30
Case study
rollover ejection mitigation curtain airbag for an SUV — simulation, validation, and production sign-off.
rolloverejection