The Experts below are selected from a list of 4287 Experts worldwide ranked by ideXlab platform
Yukou Takahashi - One of the best experts on this subject based on the ideXlab platform.
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examination of human body mass influence on pedestrian Pelvis Injury prediction using a human fe model
2012 IRCOBI ConferenceInternational Research Council on Biomechanics of Injury (IRCOBI)Collision Research & Analysis Inc.JP Research Inc.Nissan Motor , 2012Co-Authors: Yasuaki Gunji, Masayoshi Okamoto, Yukou TakahashiAbstract:This research examined the influence of the change of the mass of each part of a human body on Pelvis Injury using the compression between the right and left acetabulum of the human FE model, which was identified as the best predictor of pubic rami fracture by a previous research. Four vehicle models were used to represent different loading locations from the hood edge. The sensitivity of the mass of each part of a human body to the Pelvis Injury index was analyzed by changing the mass density of the following parts to 1/10: 1) contralateral thigh and leg flesh, 2) contralateral leg flesh, 3) struck side thigh and leg flesh, 4) struck side leg flesh. In addition, 5) the mass of the upper body was reduced to 1/10. The changes of the peak values of the Pelvis Injury index were investigated for the combinations of these cases and the four vehicles. The mechanism behind these differences was discussed by investigating time histories of the Pelvis Injury index, Pelvis and lower limb internal loads. In addition, the assumptions of the mechanism were developed and validated using a simplified pedestrian model that represents the mechanism in a more simplistic manner than that of the actual human.
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examination of a Pelvis Injury evaluation capability of the upper legform using a human fe model
Transactions of the Society of Automotive Engineers of Japan, 2012Co-Authors: Yasuaki Gunji, Yu Kanayama, Yukou TakahashiAbstract:A large part of Pelvis injuries in pedestrian accidents are due to contact with the high bonnet leading edge (BLE) of vehicles such as SUVs. This research examined the capability of Pelvis Injury evaluation by comparing injuries estimated using a combination of a human FE model and a Pelvis Injury index, and the Injury measures from the upper legform adopted by Euro NCAP for the BLE tests.歩行者事故における腰部傷害は、ボンネットリーディングエッジ（BLE）に起因するものが多い。本研究では、人体FEモデルと腰部傷害指標から推定した腰部傷害の可能性と、Euro NCAPでBLE評価に採用されている大腿部インパクタの傷害値との比較を行い、インパクタによる腰部傷害評価の可能性を検討した。
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investigation of Injury indices and an Injury probability function for the Pelvis of a pedestrian using a human finite element model
Transactions of the Society of Automotive Engineers of Japan, 2012Co-Authors: Yasuaki Gunji, Masayoshi Okamoto, Yukou TakahashiAbstract:In the past research, a pedestrian Pelvis Injury index was examined using a human FE model and simplified vehicle models representing various shapes and stiffness characteristics of vehicles. In this research, an enhanced Pelvis Injury index was developed by using an improved version of the Pelvis model, and further investigating the shapes and stiffness characteristics of the simplified vehicle models to better represent pedestrian loading from actual vehicles.過去の研究において、人体FEモデルと種々の車体形状および特性を模擬した簡易車体モデルを用い、歩行者腰部傷害指標を検討した。本研究では、改良版の骨盤モデルを用い、衝突時の車体からの入力の再現性を高めるため簡易車体モデルの形状、荷重特性を精査することで、傷害指標の精度向上を図った。
Yasuaki Gunji - One of the best experts on this subject based on the ideXlab platform.
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examination of human body mass influence on pedestrian Pelvis Injury prediction using a human fe model
2012 IRCOBI ConferenceInternational Research Council on Biomechanics of Injury (IRCOBI)Collision Research & Analysis Inc.JP Research Inc.Nissan Motor , 2012Co-Authors: Yasuaki Gunji, Masayoshi Okamoto, Yukou TakahashiAbstract:This research examined the influence of the change of the mass of each part of a human body on Pelvis Injury using the compression between the right and left acetabulum of the human FE model, which was identified as the best predictor of pubic rami fracture by a previous research. Four vehicle models were used to represent different loading locations from the hood edge. The sensitivity of the mass of each part of a human body to the Pelvis Injury index was analyzed by changing the mass density of the following parts to 1/10: 1) contralateral thigh and leg flesh, 2) contralateral leg flesh, 3) struck side thigh and leg flesh, 4) struck side leg flesh. In addition, 5) the mass of the upper body was reduced to 1/10. The changes of the peak values of the Pelvis Injury index were investigated for the combinations of these cases and the four vehicles. The mechanism behind these differences was discussed by investigating time histories of the Pelvis Injury index, Pelvis and lower limb internal loads. In addition, the assumptions of the mechanism were developed and validated using a simplified pedestrian model that represents the mechanism in a more simplistic manner than that of the actual human.
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examination of a Pelvis Injury evaluation capability of the upper legform using a human fe model
Transactions of the Society of Automotive Engineers of Japan, 2012Co-Authors: Yasuaki Gunji, Yu Kanayama, Yukou TakahashiAbstract:A large part of Pelvis injuries in pedestrian accidents are due to contact with the high bonnet leading edge (BLE) of vehicles such as SUVs. This research examined the capability of Pelvis Injury evaluation by comparing injuries estimated using a combination of a human FE model and a Pelvis Injury index, and the Injury measures from the upper legform adopted by Euro NCAP for the BLE tests.歩行者事故における腰部傷害は、ボンネットリーディングエッジ（BLE）に起因するものが多い。本研究では、人体FEモデルと腰部傷害指標から推定した腰部傷害の可能性と、Euro NCAPでBLE評価に採用されている大腿部インパクタの傷害値との比較を行い、インパクタによる腰部傷害評価の可能性を検討した。
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investigation of Injury indices and an Injury probability function for the Pelvis of a pedestrian using a human finite element model
Transactions of the Society of Automotive Engineers of Japan, 2012Co-Authors: Yasuaki Gunji, Masayoshi Okamoto, Yukou TakahashiAbstract:In the past research, a pedestrian Pelvis Injury index was examined using a human FE model and simplified vehicle models representing various shapes and stiffness characteristics of vehicles. In this research, an enhanced Pelvis Injury index was developed by using an improved version of the Pelvis model, and further investigating the shapes and stiffness characteristics of the simplified vehicle models to better represent pedestrian loading from actual vehicles.過去の研究において、人体FEモデルと種々の車体形状および特性を模擬した簡易車体モデルを用い、歩行者腰部傷害指標を検討した。本研究では、改良版の骨盤モデルを用い、衝突時の車体からの入力の再現性を高めるため簡易車体モデルの形状、荷重特性を精査することで、傷害指標の精度向上を図った。
Masayoshi Okamoto - One of the best experts on this subject based on the ideXlab platform.
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examination of human body mass influence on pedestrian Pelvis Injury prediction using a human fe model
2012 IRCOBI ConferenceInternational Research Council on Biomechanics of Injury (IRCOBI)Collision Research & Analysis Inc.JP Research Inc.Nissan Motor , 2012Co-Authors: Yasuaki Gunji, Masayoshi Okamoto, Yukou TakahashiAbstract:This research examined the influence of the change of the mass of each part of a human body on Pelvis Injury using the compression between the right and left acetabulum of the human FE model, which was identified as the best predictor of pubic rami fracture by a previous research. Four vehicle models were used to represent different loading locations from the hood edge. The sensitivity of the mass of each part of a human body to the Pelvis Injury index was analyzed by changing the mass density of the following parts to 1/10: 1) contralateral thigh and leg flesh, 2) contralateral leg flesh, 3) struck side thigh and leg flesh, 4) struck side leg flesh. In addition, 5) the mass of the upper body was reduced to 1/10. The changes of the peak values of the Pelvis Injury index were investigated for the combinations of these cases and the four vehicles. The mechanism behind these differences was discussed by investigating time histories of the Pelvis Injury index, Pelvis and lower limb internal loads. In addition, the assumptions of the mechanism were developed and validated using a simplified pedestrian model that represents the mechanism in a more simplistic manner than that of the actual human.
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investigation of Injury indices and an Injury probability function for the Pelvis of a pedestrian using a human finite element model
Transactions of the Society of Automotive Engineers of Japan, 2012Co-Authors: Yasuaki Gunji, Masayoshi Okamoto, Yukou TakahashiAbstract:In the past research, a pedestrian Pelvis Injury index was examined using a human FE model and simplified vehicle models representing various shapes and stiffness characteristics of vehicles. In this research, an enhanced Pelvis Injury index was developed by using an improved version of the Pelvis model, and further investigating the shapes and stiffness characteristics of the simplified vehicle models to better represent pedestrian loading from actual vehicles.過去の研究において、人体FEモデルと種々の車体形状および特性を模擬した簡易車体モデルを用い、歩行者腰部傷害指標を検討した。本研究では、改良版の骨盤モデルを用い、衝突時の車体からの入力の再現性を高めるため簡易車体モデルの形状、荷重特性を精査することで、傷害指標の精度向上を図った。
Gunter Schroeder - One of the best experts on this subject based on the ideXlab platform.
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assessing femur and Pelvis Injury risk in car pedestrian collisions comparison of full body pmto impacts and a human body finite element model
Proceedings of the 19th International Technical Conference on the Enhanced Safety of Vehicles (ESV), 2005Co-Authors: Jess G Snedeker, Felix H Walz, Markus H Muser, Christian Lanz, Gunter SchroederAbstract:A considerable potential for reducing fatalities of pedestrians and other vulnerable road users lies in the design of car front shapes. Vehicle safety tests have been proposed by the European Experimental Vehicles Committee (EEVC) Working Group (WG) 17, and are currently in discussion by legal entities, as well as car makers. In this study, the authors first present numerical simulations of various pedestrian impacts against several different simplified hood shapes. Impacts were simulated using a detailed finite element model of a mid-size pedestrian that has been extensively validated in previous studies. As expected, the model revealed that biomechanical loading patterns are heavily influenced by hood leading edge shape. In a second step, femoral and pelvic bone surface strains were measured in five full body Post Mortem Test Object (PMTO) impacts at 40 kph using physical representations of the simulated car shapes. Each PMTO was instrumented with strain gauges on the impact side: four on the femoral shaft, three on the femoral neck, and three on the superior ramus of the Pelvis. Accelerometers were placed on the dorsal aspect of vertebra T6 and L5. High speed digital video was recorded at 1,000 frames per second from the side. Fracture risk was examined with respect to car geometry, pedestrian stature, and bone quality as indicated by peripheral quantitative computed tomography (pQCT) of the femoral neck. Experimental results indicated a remarkable predictive ability of the finite element model in assessing femur and pelvic Injury risk. Strain data yielded valuable insight into the failure threshold of the pelvic rami, which was observed to fracture in three of the tests. The largest factor in pelvic fracture was low bone quality, rather than car geometry. Based upon results of the model and PMTO experiments, recommendations are offered for a more appropriate characterization of the hood shape with regard to Pelvis and femur Injury risk.
A Sasaki - One of the best experts on this subject based on the ideXlab platform.
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proposal of Injury risk curves for evaluating pedestrian femur Pelvis Injury risk using eevc upper legform impactor based on accident reconstruction
International Journal of Crashworthiness, 2006Co-Authors: Yasuhiro Matsui, H Ishikawa, A SasakiAbstract:Abstract New Injury risk curves for the evaluation of pedestrian femur and pelvic Injury risk by means of the upper legform impactor of the European Enhanced Vehicle-Safety Committee (EEVC) developed by the Transport Research Laboratory are proposed in this study. Lower extremity responses related to the risk of pedestrian femur and pelvic fractures caused by the bonnet leading edge and wing contact in a real-world pedestrian accident, such as impact force and bending moment, were reconstructed in the present study using the EEVC upper legform impactor. The femur and pelvic Injury risk curves were developed from application of the model of Weibull cumulative frequency to measured impact force and bending moment. The newly developed Injury risk curves indicated that an impact force of 6.3 kN and a bending moment of 417 Nm measured by the EEVC upper legform impactor correspond to a 0.2 probability of femur and pelvic fractures. The Injury risk curves also showed that an impact force of 7.5 kN and a bending ...