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Airbag Fabric Material Modeling and Test Validation

30 Chapters
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01
Airbag fabric material modeling and test validation
course scope, engineering context, and safety-critical requirements.
materialmodeling
02
Airbag fabric constructions
woven architectures, yarn types, coatings, and their influence on mechanical behavior.
constructionsarchitectures
03
Material characterization for airbag fabrics
tensile, shear, bending, and friction test methods and data reduction.
Materialcharacterization
04
Constitutive modeling of airbag fabrics
continuum, mesoscale, and phenomenological approaches for anisotropic behavior.
Constitutivemodeling
05
Orthotropic elasticity and hyperelasticity for airbag fabrics
formulation, calibration, and limitations.
Orthotropicelasticity
06
Yield criteria and plasticity models for airbag fabrics
capturing directional strength and permanent deformation.
criteriaplasticity
07
Damage and failure modeling in airbag fabrics
continuum damage mechanics, fracture, and energy-based criteria.
modelingcontinuum
08
Strain-rate dependence of airbag fabrics
experimental characterization and rate-dependent constitutive laws.
Strain-ratedependence
09
Viscoelastic and viscoplastic modeling of airbag fabrics
time-dependent behavior under deployment loads.
Viscoelasticviscoplastic
10
Fabric permeability and gas flow modeling
coupling with structural response during inflation.
permeabilitymodeling
11
Mesoscale modeling of woven airbag fabrics
unit cell generation, periodic boundary conditions, and homogenization.
Mesoscalemodeling
12
Finite element modeling of airbag fabrics
shell, membrane, and solid element formulations and mesh considerations.
modelingmembrane
13
Material model calibration from test data
optimization, parameter identification, and validation metrics.
Materialcalibration
14
Test validation of airbag fabric models
coupon-level, component-level, and full-scale experiments.
validationcoupon-level
15
Drop tower and impact testing for airbag fabrics
setup, instrumentation, and data analysis.
instrumentationanalysis
16
Dynamic inflation and deployment testing
high-speed imaging, pressure measurement, and model correlation.
inflationdeployment
17
Airbag fabric model validation under biaxial and multiaxial loading
cruciform and cylinder tests.
validationmultiaxial
18
Seam and joint modeling in airbag fabrics
stitch types, failure modes, and validation.
modelingvalidation
19
Environmental effects on airbag fabrics
temperature, humidity, and aging on material properties and model predictions.
Environmentaltemperature
20
Numerical stability and convergence in airbag fabric simulations
explicit dynamics, time step, and contact.
Numericalstability
21
Airbag fabric model verification and validation (V&V)
ASME V&V 10 and 20 frameworks and best practices.
verificationvalidation
22
Uncertainty quantification in airbag fabric modeling
variability in material properties and test data.
Uncertaintyquantification
23
Case study
driver-side airbag fabric model development and validation for FMVSS 208.
driver-sidedevelopment
24
Case study
side curtain airbag fabric modeling and validation for rollover and side impact.
modelingvalidation
25
Case study
pedestrian airbag fabric modeling and validation for head impact protection.
pedestrianmodeling
26
Advanced topics
machine learning and surrogate models for airbag fabric constitutive behavior.
Advancedsurrogate
27
Multiscale modeling of airbag fabrics
linking yarn-level mechanisms to continuum predictions.
Multiscalemodeling
28
Coupled fluid-structure interaction (FSI) for airbag deployment
fabric modeling and gas dynamics.
fluid-structureinteraction
29
Airbag fabric model validation for out-of-position (OOP) occupants
challenges and strategies.
validationout-of-position
30
Future trends and emerging standards in airbag fabric material modeling and test validation.
Future trends and emerging standards in airbag fabric material modeling and test validation.
emergingstandards