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CAE Injury Curve Analysis and Overlay 30 Cases

30 Chapters

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Import and Standardize Injury Curves from Multiple CAE Sources

Load injury-time curves from LS-DYNA, PAM-CRASH, and Abaqus outputs into a unified data structure, normalizing time bases and signal units to enable consistent overlay analysis.

StandardizeMultiple

Overlay Curves with Different Time Steps Using Resampling

Implement a resampling strategy to align curves with non-uniform time steps onto a common time vector, preserving peak values and avoiding aliasing artifacts in the overlay.

DifferentResampling

Compute and Overlay Cumulative Strain Damage Measure (CSDM) Curves

Calculate CSDM from principal strain histories for multiple simulations and overlay the resulting cumulative distribution curves to compare injury risk across configurations.

Overlay Maximum Principal Strain Curves for Brain Tissue

Extract maximum principal strain time histories from brain tissue elements and overlay them across different impact directions, highlighting phase and amplitude differences.

Principalhistories

Align Curves by Impact Event Onset Using Cross-Correlation

Use cross-correlation to automatically detect and align the impact onset time across multiple injury curves, enabling meaningful overlay despite varying initialization delays.

Cross-Correlationautomatically

Overlay Head Acceleration Curves and Compute HIC

Overlay resultant head acceleration curves from multiple tests, compute Head Injury Criterion (HIC) for each, and annotate the overlay with HIC values and time windows.

AccelerationHIC

Overlay Chest Deflection Curves and Compare Injury Risk

Overlay chest deflection time histories from different restraint configurations and compute normalized deflection rates to compare injury risk against established thresholds.

Deflectionhistories

Overlay Neck Injury Criteria Curves (Nij, Nkm)

Calculate and overlay neck injury criteria (Nij and Nkm) time histories from multiple simulations, highlighting differences in peak timing and magnitude.

CriteriaCalculate

Overlay Lower Extremity Injury Curves (Tibia Index, Femur Force)

Overlay tibia index and femur force curves from different loading conditions, and compute peak values and time-to-peak for comparative assessment.

Extremitydifferent

Overlay Curves with Confidence Bands from Multiple Runs

Generate mean and confidence band curves from multiple simulation runs and overlay them to visualize variability and identify statistically significant differences.

ConfidenceMultiple

Overlay Curves from Different Dummy Models (Hybrid III vs THOR)

Overlay injury curves from Hybrid III and THOR dummy models under identical loading, and quantify differences in response timing and magnitude to assess model sensitivity.

Overlay Curves from Physical Sled Tests and CAE Simulations

Overlay injury curves from physical sled tests and corresponding CAE simulations, compute correlation metrics, and identify discrepancies for model validation.

Overlay Curves with Filtering and Smoothing (CFC 600/1000)

Apply CFC 600 and CFC 1000 filters to injury curves, overlay filtered and unfiltered results, and evaluate the effect of filtering on peak values and injury criteria.

FilteringSmoothing

Overlay Curves with Time Shift and Scaling for Sensitivity Analysis

Systematically shift and scale injury curves to simulate variations in impact timing and severity, overlay the perturbed curves, and analyze sensitivity of injury metrics.

SensitivityAnalysis

Overlay Curves from Different Impact Speeds and Angles

Overlay injury curves from simulations with varying impact speeds and angles, and extract trends in peak injury metrics to support parameter studies.

Differentsimulations

Overlay Curves for Restraint System Optimization

Overlay injury curves from different airbag and seatbelt configurations, and compare injury metrics to identify the optimal restraint setting for minimizing injury risk.

RestraintOptimization

Overlay Curves from Occupant Positions (Driver vs Passenger)

Overlay injury curves from driver and passenger positions under the same crash pulse, and analyze differences in injury timing and severity due to position.

OccupantPositions

Overlay Curves from Different Element Types (Shell vs Solid)

Overlay injury curves extracted from shell and solid element representations of the same structure, and evaluate mesh-type effects on injury prediction.

Differentextracted

Overlay Curves from Different Material Models (Elastic vs Plastic)

Overlay injury curves from simulations using elastic and plastic material models for biological tissues, and assess the influence of material nonlinearity on injury metrics.

DifferentMaterial

Overlay Curves from Different Contact Definitions

Overlay injury curves from simulations with varying contact stiffness and friction, and analyze how contact parameters affect injury response.

DifferentDefinitions

Overlay Curves from Different Hourglass Control Settings

Overlay injury curves from simulations with different hourglass control methods, and evaluate the impact on injury metrics and curve stability.

DifferentHourglass

Overlay Curves from Different Time Integration Schemes

Overlay injury curves from explicit and implicit time integration schemes, and compare accuracy and computational efficiency for injury analysis.

DifferentIntegration

Overlay Curves from Different Damping Treatments

Overlay injury curves from simulations with and without damping, and quantify the effect of damping on peak injury values and oscillation.

DifferentTreatments

Overlay Curves from Different Mesh Densities

Overlay injury curves from meshes with varying element sizes, and perform a mesh convergence study for injury metrics.

DifferentDensities

Overlay Curves from Different Boundary Conditions

Overlay injury curves from simulations with fixed and free boundary conditions, and analyze how boundary constraints affect injury prediction.

DifferentBoundary

Overlay Curves from Different Initial Conditions

Overlay injury curves from simulations with varying initial velocities and positions, and assess the sensitivity of injury metrics to initial conditions.

DifferentConditions

Overlay Curves from Different Output Sampling Rates

Overlay injury curves sampled at different frequencies, and evaluate the effect of sampling rate on peak detection and injury criteria calculation.

DifferentSampling

Overlay Curves from Different Filtering Techniques (Butterworth vs CFC)

Overlay injury curves filtered with Butterworth and CFC filters, and compare their effects on injury metrics and curve smoothness.

DifferentFiltering

Overlay Curves from Different Injury Criteria Definitions

Overlay curves for different injury criteria (e.g., HIC15 vs HIC36, Nij vs Nkm) and analyze how criteria definitions affect injury risk assessment.

DifferentCriteria

Automated Overlay Report Generation with Key Metrics

Develop a script to automatically generate overlay plots for a set of injury curves, compute key metrics (peak, time-to-peak, HIC, etc.), and export a summary report.

AutomatedGeneration