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Virtual Crash Testing Applicability and Acceptance Boundaries

30 Chapters
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01
Framing virtual crash testing
definitions, simulation fidelity, and the regulatory and engineering decision context for applicability and acceptance.
definitionssimulation
02
Crashworthiness requirements and assessment metrics
occupant injury criteria, structural integrity measures, and how they map to virtual test outputs.
Crashworthinessrequirements
03
Simulation model development lifecycle
geometry preparation, meshing, material modeling, and model verification for crash applications.
Simulationdevelopment
04
Correlation and validation fundamentals
test-to-simulation comparison metrics, objective rating methods, and validation hierarchy concepts.
Correlationvalidation
05
Applicability boundaries from physics
strain-rate sensitivity, failure modeling limits, and mesh-size dependencies in crash simulation.
Applicabilityboundaries
06
Acceptance criteria for model validation
defining quantitative thresholds, confidence intervals, and statistical acceptance for virtual testing.
Acceptancecriteria
07
Regulatory landscape for virtual testing
UN R94/R95, FMVSS, Euro NCAP, and emerging virtual testing provisions in homologation.
Regulatorylandscape
08
Virtual testing in occupant protection
sled and full-vehicle simulation applicability for restraint system assessment.
occupantprotection
09
Pedestrian protection simulation
head impactor and legform modeling, correlation challenges, and acceptance for virtual assessment.
Pedestrianprotection
10
Side impact virtual testing
barrier and pole impact simulation, door intrusion modeling, and boundary conditions for acceptance.
simulationintrusion
11
Rear impact and whiplash simulation
seat and head restraint modeling, biofidelity requirements, and acceptance limits.
whiplashsimulation
12
Frontal impact virtual testing
full-width and offset deformable barrier simulations, structural crash pulse correlation, and acceptance.
full-widthdeformable
13
Material model calibration and its impact on applicability
steel, aluminum, composites, and plastics under crash loading.
Materialcalibration
14
Joint and connection modeling
spot welds, adhesives, bolts, and their influence on simulation acceptance boundaries.
connectionmodeling
15
Boundary and initial conditions
prescribed velocities, rigid walls, and their effect on virtual test representativeness.
Boundaryconditions
16
Occupant model validation
ATD finite element models, human body models, and biofidelity acceptance for injury prediction.
Occupantvalidation
17
Airbag and restraint simulation
deployment modeling, gas dynamics, and acceptance for out-of-position and in-position cases.
restraintsimulation
18
Sensitivity and uncertainty quantification
identifying dominant parameters and establishing robustness of virtual test conclusions.
Sensitivityuncertainty
19
Mesh convergence and discretization error
establishing mesh adequacy for acceptance and defining applicability limits.
convergencediscretization
20
Time step and explicit solver considerations
stability, mass scaling, and their impact on result validity and acceptance.
explicitconsiderations
21
Contact and impact modeling
penalty and kinematic contact, friction, and their role in simulation fidelity and acceptance.
modelingkinematic
22
Validation experiments
design of test matrices, instrumentation, and data processing for correlation with simulation.
Validationexperiments
23
Acceptance metrics in practice
CORA, ISO/TS 18571, and other objective rating methods for signal correlation.
AcceptanceCORA
24
Case study
frontal offset crash simulation validation and acceptance decision for a body-in-white structure.
simulationvalidation
25
Case study
side pole impact simulation for occupant protection and setting acceptance boundaries.
simulationoccupant
26
Case study
pedestrian head impact simulation and correlation with subsystem test data.
pedestriansimulation
27
Virtual testing for restraint system optimization
establishing applicability domain and acceptance for design decisions.
restraintoptimization
28
Documentation and traceability
model version control, validation evidence, and reporting for regulatory acceptance.
Documentationtraceability
29
Extending applicability
extrapolation to new configurations, materials, and load cases with justified acceptance boundaries.
Extendingapplicability
30
Capstone project
develop a validation and acceptance plan for a virtual crash test scenario, including applicability assessment and acceptance criteria.
Capstonevalidation