Modular Loadwall Side Impacts: Implications for Advanced Sensor Deflection Measures in Dummies
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Transcript of Modular Loadwall Side Impacts: Implications for Advanced Sensor Deflection Measures in Dummies
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Modular Loadwall Side Impacts: Implications for Advanced Sensor Deflection Measures in DummiesJohn R. HummN. YoganandanFrank A. Pintar
Department of Neurosurgery Milwaukee, WI
#1Recent Field StudiesCIREN casesNASS analysesOblique loading is more prevalentInjuries are different from pure lateralPintar et al, 2007-9
Pure lateralObliqueOblique versus Pure Lateral LoadingInjury CriteriaResponse Corridors of Human Surrogates in Lateral Impacts. Maltese et. al Stapp 2002Development of Side Impact Thoracic Injury Criteria and Their Application to the Modified ES-2 Dummy with Rib Extensions. Kuppa et. al. Stapp 2003Injury Risk Curves for the WorldSID 50th Male Dummy. Peitjean et. al. Stapp 2009
Developed for Pure Lateral LoadingOblique and Pure Lateral Sled Tests Anthropometry differencesRegion design differencesRib design differences
ES-2 re WorldSIDNeed Modular Scalable Load-Wall
ShoulderThoraxAbdomenPelvis (superior)Pelvis (inferior)Leg plateModular Scalable Load-Wall STAPP load-wall design6
WorldSID Alignment
7WorldSID Alignment
8WorldSID Alignment
9WorldSID Alignment
10WorldSID Alignment
11Loadwalls12
Test Protocol and InstrumentationWorldSID 50% dummyOblique and pure lateral loadingsThree repeat tests at 3.35, 6.7, 7.5 m/sRegion-specific deflection datasets2 Chestbands: thorax and abdomen Internal sensors
Overhead Videos Images
Chestband OutputsEffective peak deflectionsEffective peak angulationsSimulated IR-TRACC-type peak deflectionsThoracic and abdominal regions
Chestband Contours
ObliquePure Lateral
Effective Peak Deflection from Chestbands
SPINESTERNUML00.5 L0Define Origin: Pre-impact contour
Effective Peak Deflection from ChestbandsDefine Origin: Subsequent contoursSPINESTERNUM0.5 L0Effective Peak Deflection from Chestbands
Distance of each point on the contour relative to the origin is computed at each time stept2t1t0DtoDt1Temporal deflection at any point and time, i: Dt0 DtiDt2
Determination of Peak Deflections
t2t1t0DtoDt1Dt2Determination of Peak Deflections
D0Dt
Effective Peak Deflection Effective Peak AngleDetermination of Peak DeflectionsSimulated IR-TRACC-type Deflections
Based on chestband data
WorldSID Thorax Deflections Oblique
WorldSID DeflectionsObliqueThoraxAbdomen
WorldSID DeflectionsPure LateralThoraxAbdomen
ThoraxAbdomen
Angle of effective peak chest deflections
Deflections from Internal Sensors Peak deflections from IR-TRACC
Internal Sensor Peak DeflectionsThoraxAbdomen
Application RibEye
Multipoint Sensing Chestband Data
2D-IR-TRACC: Angular Measurements
Simulated 2D IR-TRACC angle
Based on chestband data
Simulated 2D-IR-TRACC angle
SummaryRegion-specific responsesEffective in sensing pure lateral loadsPeak internal sensor deflections oblique