Modeling and Prediction of Occupant Knee-Thigh-Hip Injuries
Although extensive modeling efforts have been made in the past decades to predict occupant/pedestrian knee-thigh-hip (KTH) injuries, prediction for the injuries at the tissue level for various loading conditions observed in automotive crashes is still challenging. This study develops model-based tissue injury criteria and a tool to predict occupant KTH injuries subject to different postures and loading rates. An effective plastic strain based injury criterion with a defined universal threshold was developed for identification of the potential injury locations in the KTH body region. The published cadaver KTH low-rate impact tests at three postures of neutral, adduction, and flexion by UMTRI (University of Michigan Transportation Research Institute) have been simulated with the Takata 50th% male human model. Using the defined criteria, the model predicted the hip-bone and hip-joint fractures for the three postures, were well correlated to those observed from the tests. The KTH impacts were also simulated at two loading rates. The simulation results indicated a possible mode shift of the impact rate-associated injury with assumptions of viscous effects on hip-joint. A high rate impact more likely generates a fracture at the femur shaft; and the impact at a lower rate more likely fractures the hip-joint. The validated KTH injury criteria and tool were thus applied for accident reconstruction of two vehicle crash cases (full frontal and offset frontal impacts) selected from the NASS/CDS & CIREN database, which caused occupant KTH injuries at AIS 2-3 scale. The simulations match the injury outcomes of the reported field observations. The full text of this paper may be found at: http://www-nrd.nhtsa.dot.gov/pdf/esv/esv21/09-0334.pdf For the covering abstract see ITRD E145407.
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Authors:
- HU, J
- ZHAO, J Z
- KLINKENBERGER, A
- Publication Date: 2009
Language
- English
Media Info
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Serial:
- PROCEEDINGS OF THE 21ST (ESV) INTERNATIONAL TECHNICAL CONFERENCE ON THE ENHANCED SAFETY OF VEHICLES, HELD JUNE 2009, STUTTGART, GERMANY
- Publisher: National Highway Traffic Safety Administration
Subject/Index Terms
- TRT Terms: Conferences; Fractures (Anatomy); Hip; Injuries; Knee; Leg; Mathematical models; Posture; Simulation
- ITRD Terms: 8525: Conference; 2161: Fracture (bone); 2003: Hip (human); 2163: Injury; 2013: Knee (human); 2023: Leg (human); 6473: Mathematical model; 2094: Posture; 9103: Simulation
- Subject Areas: Safety and Human Factors; I84: Personal Injuries;
Filing Info
- Accession Number: 01336422
- Record Type: Publication
- Source Agency: TRL
- Files: ITRD
- Created Date: Apr 15 2011 3:30PM