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CAB Curtain Airbag Impact Test and CAE Correlation

30 Chapters
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01
CAB system fundamentals
curtain airbag architecture, deployment logic, and occupant protection mechanisms in side impact and rollover events.
CABarchitecture
02
Regulatory and consumer rating requirements
FMVSS 226, ECE R135, C-NCAP, Euro NCAP, and IIHS side impact and rollover test protocols for CAB evaluation.
Regulatoryconsumer
03
CAB impact test setup
sled and vehicle-level test configurations, fixture design, and instrumentation for pressure, acceleration, and displacement measurement.
CABvehicle-level
04
Occupant injury criteria for CAB assessment
HIC, BrIC, neck injury metrics, and ejection mitigation performance measures.
Occupantcriteria
05
High-speed video and photogrammetry in CAB testing
camera placement, frame rate selection, and image analysis for deployment kinematics.
High-speedphotogrammetry
06
Pressure-time history acquisition
sensor selection, mounting locations, sampling rates, and signal conditioning for inflator and chamber pressure.
Pressure-timeacquisition
07
Test data processing and filtering
SAE J211 channel classes, CFC filtering, zeroing, and time alignment across channels.
processingfiltering
08
CAE model development for CAB
airbag geometry, mesh generation, and material property assignment for fabric and inflator components.
CAEdevelopment
09
Inflator modeling approaches
tank test characterization, mass flow rate curves, and gas temperature effects in CAE simulation.
Inflatormodeling
10
Fabric material modeling
orthotropic behavior, permeability, strain-rate effects, and failure criteria for coated and uncoated fabrics.
materialmodeling
11
Fluid-structure interaction in CAB simulation
uniform pressure, control volume, and ALE/FSI methods for deployment and impact.
Fluid-structureinteraction
12
Contact and penetration modeling
airbag-to-occupant, airbag-to-interior, and airbag-to-ground contact definitions and friction parameters.
penetrationmodeling
13
Occupant restraint system modeling
dummy positioning, belt routing, seat interaction, and pre-simulation setup for CAB correlation.
Occupantrestraint
14
Side impact barrier and pole modeling
deformable barrier, rigid pole, and vehicle target geometry for CAE correlation studies.
modelingdeformable
15
Correlation metrics and acceptance criteria
peak value, timing, pulse shape, and objective rating methods such as CORA and ISO/TS 18571.
Correlationacceptance
16
Sensitivity analysis in CAB CAE
parameter screening, design of experiments, and identification of dominant factors affecting correlation.
Sensitivityanalysis
17
Inflator curve tuning for correlation
adjusting mass flow rate, burn rate, and gas temperature to match tank and airbag pressure data.
Inflatorcorrelation
18
Fabric permeability and porosity calibration
correlating venting and leakage behavior between test and simulation.
permeabilityporosity
19
Deployment kinematics correlation
matching unfolding sequence, seam stress, and tether engagement timing using high-speed video and CAE animation.
Deploymentkinematics
20
Occupant injury correlation
comparing dummy response signals and injury metrics between physical test and CAE simulation.
Occupantcorrelation
21
Ejection mitigation correlation
matching head excursion, coverage area, and retention performance in rollover and side impact scenarios.
Ejectionmitigation
22
Out-of-position (OOP) occupant correlation
low-risk deployment (LRD) and static deployment test correlation for CAB.
Out-of-positionOOP
23
Environmental and aging effects
temperature, humidity, and inflator aging impact on CAB performance and CAE model updates.
Environmentaltemperature
24
Mesh convergence and time step optimization
balancing accuracy and computational cost for CAB impact simulation.
convergenceoptimization
25
Material characterization testing for CAE
tensile, tear, friction, and permeability tests to populate fabric and inflator models.
Materialcharacterization
26
Validation hierarchy
component, subsystem, and full-vehicle correlation stages for CAB CAE sign-off.
Validationhierarchy
27
Case study
full-vehicle side impact CAB correlation — test setup, CAE model build, correlation iterations, and final validation.
full-vehicleCAB
28
Case study
rollover ejection mitigation CAB correlation — test protocol, CAE challenges, and correlation improvement strategies.
rolloverejection
29
Automation and scripting in CAB CAE correlation
Python scripting for data extraction, metric calculation, and report generation.
Automationscripting
30
Future trends and advanced methods
machine learning for correlation, real-time simulation, and digital twin applications for CAB systems.
advancedcorrelation