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Lateral Pelvis
Background
The Lateral Pelvis tool is used to process simulation results from a Bouquet-type pelvis impact [1]. This tool becomes active when rigid body part ID 8100019 is in the loaded binout data. The goal of the tool is to allow users to compare model outputs to both literature data and to the baseline GHBMC model following internal modifications.
The lateral pelvis impact consists of a square-faced impactor weighing 16 kg impacting with 800 J of energy. This requires giving the impactor a 10 m/s velocity in the lateral direction. The impactor contacts the trochanter and iliac crest at 90 degrees lateral, according to the literature. Pelvic deflection is measured as the relative displacement between the outer hip and a node on the center of the sacrum. The force response is measured using the contact force of the impacting plate. No normalization was applied for development of the experimental corridors. The experimental PMHS specimens consisted of 3 males and 1 female with an average mass of 55.4 ± 18.3 kg.
The boundary condition files for validation cases are available in a directory called “validation_cases” within the Metriks installation folder: e.g. C:/Program Files (x86)/Metriks/validation_cases
| Panel Descriptions | |
|---|---|
| Graphic of impact boundary condition and relevant simulation and post-processing information | Force vs Deflection response plotted against the Bouquet et al. (1998) corridors. The user loaded model is plotted in red and the baseline M50-O v5.1 with fracture on is plotted in black. |
| Key aspects of the energy balance for the full simulation are reported | Human Body Model Energy Plot |
| Added mass and %Added mass as a function of initial mass are reported for the human body model | |
Data Processing Methods
Compression
1. Extract coordinates of the plate CG using PID 8100019
2. Extract coordinates for the sacrum
a. For GHBMC M50-O v5.1.1: Node ID 8005742
b. This default node ID can be overridden in Human Body Model Settings under Nodes->Sacrum.
3. Calculate deflection using Euclidean norm between plate and sacrum
4. Normalize deflection by the initial measured half-pelvis width measurement
a. For GHBMC M50-O v5.1.1: 172.1 mm
b. This default measurement can be overridden in Human Body Model Settings under Measurements->Half Pelvis Width
Force
1. Extract resultant contact force data for contact between the impactor and flesh
a. For GHBMC M50-O v5.1.1: RCFORC ID 10
2. Filter using SAE CFC 600
References
[1] Bouquet, R., Ramet, M., Bermond, F., Caire, Y., Talantikite, Y., Robin, S., Voiglio, E. (1998) Pelvis human response to lateral impact. Proc. 16th International Technical Conference on the Enhanced Safety of Vehicles, pp. 1665-1686.