Biofidelity Evaluation for the Knee and Leg of the Polar Pedestrian Dummy

Biofidelity of the Polar-II pedestrian dummy lower extremity was assessed in a series of dynamic bending tests relative to published PMHS (Post Mortem Human Subject) response corridors. Dynamic 4-point lateral bending tests of the knee joint and dynamic 3-point lateral bending tests of the leg from the original version of the Polar-II dummy were performed under identical test conditions to the published PMHS tests that simulated car-pedestrian lower limb impact at 40 km/h. Although the force-deflection and moment-deflection responses of the leg were found to be biofidelic, the knee joint test results showed that the stiffness in lateral bending needed to be increased. Based on the test results, a modified version of the knee joint was designed and fabricated with increased lateral bending stiffness to improve response biofidelity. The modified knee joint was evaluated in the dynamic 4-point lateral bending test, and the test results were compared with the same human response corridors. It was found that the moment-angle response of the modified knee joint in valgus bending was significantly closer to those of human subjects compared to the original version.

[1]  Atsuhiro Konosu,et al.  Development of a biofidelic flexible pedestrian legform impactor. , 2003, Stapp car crash journal.

[2]  Rolf H Eppinger,et al.  Development of a new biofidelity ranking system for anthropomorphic test devices. , 2002, Stapp car crash journal.

[3]  Masaaki Tanahashi,et al.  Development of a Biofidelic Flexible Pedestrian Leg-form Impactor (Flex-PLI 2004) and Evaluation of its Biofidelity at the Component Level and at the Assembly Level , 2005 .

[4]  N. Rangarajan,et al.  DEVELOPMENT OF A BIOFIDELIC DUMMY FOR CAR-PEDESTRIAN ACCIDENT STUDIES , 1999 .

[5]  R C Harruff,et al.  Analysis of circumstances and injuries in 217 pedestrian traffic fatalities. , 1998, Accident; analysis and prevention.

[6]  Akihiko Akiyama,et al.  Development and application of the new pedestrian dummy , 2001 .

[7]  Yasuhiro Matsui,et al.  Shearing and bending effects at the knee joint at high speed lateral loading , 1997 .

[8]  Yasuhiro Matsui,et al.  Pedestrian Injuries Induced by the Bonnet Leading Edge in Current Car-Pedestrian Accidents , 1999 .

[9]  S. J. Ashton,et al.  INFLUENCE OF VEHICLE DESIGN ON PEDESTRIAN LEG INJURIES , 1978 .

[10]  Yukou Takahashi,et al.  BIOFIDELITY OF TEST DEVICES AND VALIDITY OF INJURY CRITERIA FOR EVALUATING KNEE INJURIES TO PEDESTRIANS , 2001 .

[11]  K L Jarrett.  Pedestrian injury: analysis of the PCDS field collision data , 1998 .

[12]  Graham J. L. Lawrence.  PEDESTRIAN SAFETY TESTING USING THE EEVC PEDESTRIAN IMPACTORS , 1998 .

[13]  Jason R. Kerrigan,et al.  Experiments for establishing pedestrian-impact lower limb injury criteria , 2003 .

[14]  B Laumon,et al.  A FRENCH ROAD ACCIDENT TRAUMA REGISTRY: FIRST RESULTS , 1997 .

[15]  Jason R. Kerrigan,et al.  Dynamic Response Corridors and Injury Thresholds of the Pedestrian Lower Extremities , 2004 .

[16]  Janusz Kajzer,et al.  Response of the knee joint in lateral impact: effect of shearing loads , 1990 .

[17]  Dipan Bose,et al.  Response of the knee joint to the pedestrian impact loading environment , 2004 .

[18]  Akihiko Akiyama,et al.  DEVELOPMENT OF SIMULATION MODEL AND PEDESTRIAN DUMMY , 1999 .

[19]  Janusz Kajzer,et al.  Response of the knee joint in lateral impact: effect of bending moment , 1993 .

[20]  N. Rangarajan,et al.  Development of a new biofidelic leg for use with a pedestrian dummy , 2000 .

[21]  Jane C. Stutts.  Injuries to pedestrians and bicyclists: a look at non-motor vehicle and non-roadway events , 1997 .

[22]  Yasuhiro Matsui,et al.  Impact response and biofidelity of pedestrian legform impactors , 1999 .

[23]  Jason R. Kerrigan,et al.  EVALUATION OF THE RESPONSE OF MECHANICAL PEDESTRIAN KNEE JOINT IMPACTORS IN BENDING AND SHEAR LOADING , 2003 .

[24]  Jikuang Yang,et al.  Computer Simulation of Impact Response of the Human Knee Joint in Car-pedestrian Accidents , 1992 .

[25]  Dominique Cesari,et al.  Subsystem test for pedestrian lower leg and knee protection , 1991 .