4-Point Thoracic Injury Criteria Development for THOR

24 Pages·2014·0.97 MB·English

by  Gerald Poplin

4-Point Thoracic Injury Criteria
Development for THOR
Gerald Poplin, Jason Forman, Timothy McMurry,
Joseph Ash, Greg Shaw, Jeff Crandall
University of Virginia

Center for Applied Biomechanics
SAE 2014 Government & Industry Meeting
January 23, 2014
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F R
RIENDLY EMINDER

DO NOT
All material and information presented are the current
opinions of the authors only, and reflect the
viewpoints of NHTSA.
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Outline
Evolution and description of the THOR
Research aims and objectives
Overview of methodological approaches in describing
•
risk factors associated with thoracic rib injury
•
Finite Element (FE) Modeling
•
THOR sled test configurations
•
Matched cadaveric tests
Statistical analyses
Summary and current status

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THOR
Test Device for Human Occupant Restraint
1992 2U0V0A1 THOR Task-w2o0r0k5 2009-2012 2013

TAD-50M THOR Alpha THOR-NT
Mod Kit THOR
Evaluation

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THOR Mod-Kit with SD3 Shoulder
June 2012
Evaluation
SD3 Test Results:
Acceptable durability, biofidelity, effect on ribcage deformation
Funded by NHTSA Project No: DTNH22-09-H-00247
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Overall Goal
Aims & Objective
•
To develop a thoracic injury criterion for THOR that takes
• advantage of THOR’s multi-point, 3D chmesett hinosdtorluomgyentation

To develop a chest injury risk function for belt
and airbag loading in frontal collisions for THOR
Thoracic
Dummy
rib injury
measurements
in PMHS
Correlation in identical sled tests
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Development of Injury Risk Function
PMHS Sled Tests
FE modeling
Injury Outcome
100
Develop Injury Risk Functions
90
Utilize knowledge from FE, 80
FE used to investigate injury predictors from THOR and 70

60
mechanism and identify injury outcome from PMHS
50
relevant injury criteria
40
30

20
Belt and Airbag
10
Belt only
0
0 10 20 30 40 50 60 70

Matched THOR
Sled Tests
Chest Deformation
(from IRTRACCs)
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FE Modeling
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FE Modeling
Goal: Study relation between multi-point chest
deflection measurement and rib fracture risk
Human body model (HUMOS)
(Song et al. 2009, Bose et al. 2010)
Sled test simulations Test Condition Sim #
Sled 40 km/h 3pt Belt, 6 kN FL 6
Sled
Sled 45 km/h 3pt Belt, 6 kN FL 7
(Belt only)
Sled 50 km/h 3pt Belt, 6 kN FL 8
Sled 40 km/h 3pt Belt + AB, 4kN FL 9
Sled
Sled 50 km/h 3pt Belt + AB, 4kN FL 10
(Belt + AB)
Sled 60 km/h 3pt Belt + AB, 4kN FL 11
Sled 40 km/h AB only 12
Sled
Sled 45 km/h AB only 13
(AB only)
Sled 60 km/h AB only 14
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Chest deflection measures
FE Modeling
rd th
3 and 7 rib deflection
along A-P direction

T8
Resolved into X, Y, Z
UL
components (and resultant)
UR
UR UL
LL
L1
LR LL
LR
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