ITO, Daisuke |
|---|
Faculty, Department/Institute
- Faculty of Safety Science Department of Safety Management
Academic status (qualification)
- Professor Apr. 1,2022
Undergraduate Degrees・University
- Nagoya University Faculty of Engineering2004 Graduated
- Nagoya University Faculty of Engineering2004
- Nagoya University Graduate School, Division of Engineering2009
- Nagoya University Graduate School, Division of Engineering2006
- Nagoya University Graduate School, Division of Engineering2012
Graduate Degrees・University
- Nagoya University Master's Degree Program Department of Mechanical Science and Engineering 2006 Completed
- Nagoya University Doctor's Degree Program Department of Mechanical Science and Engineering 2009 ABD- Coursework completed
Academic Degrees
- Apr. 2012 Nagoya University
- 博士（工学）
Homepage Address, E-mail Address
- Homepage Address：https://wps.itc.kansai-u.ac.jp/dito/
- E-mail Address：dito@kansai-u.ac.jp
Awards
- May 26,2016
Academic Associations
| 所属学会・団体名 | 役職名 (役職在任期間) |
|---|---|
| The Japanese Councli of Traffic Science | |
| The Japan Soceity of Mechanical Engineers | |
| Society of Automotive Engineers of Japan |
Research Publications
PapersIn refereedAcademic JournalCo-authoredITO,Daisuke;KUNIYUKI, Hiroshi2022～
PapersIn refereedAcademic JournalInternational coauthorshipYuqing Zhao, Teruki Miyaharaa, Koji Mizuno, Daisuke Ito, Yong Han2020/12/1～https://doi.org/10.1016/j.aap.2020.105862
PapersIn refereedAcademic JournalCo-authoredYasuhiko Tsutsumi, Daisuke Ito, Mami Nakamura, Shinya Koshinuma, Gaku Yamamoto, Masahito Hitosugi2020/11/16～10.1016/j.joms.2020.11.005
PapersIn refereedAcademic JournalCo-authorITO,Daisuke;SUGIURA, Kotaro;MIZUNO, Koji2020/6～10.1080/13588265.2020.1779995
PapersIn refereedAcademic JournalCo-authoredKudo N, Yamada Y, Ito D2019/9/18～https://doi.org/10.1186/s40648-019-0139-9
Academic presentation2019/6/20～
Academic presentation2019/6/20～
Academic presentationCo-authored2019/6/20～
PapersIn refereed2019/5～10.11351/jsaeronbun.50.8381883-0811
PapersAEB effectiveness evaluation based on car-to-cyclist accident reconstructions using video of drive recorderZhao Yuqing, Ito Daisuke, Mizuno KojiTRAFFIC INJURY PREVENTION20,1,100-106-2019/1/2～10.1080/15389588.2018.15332471538-9588
Academic presentationCo-authored2018/12/14～
Academic presentation2018/10～
PapersValidation of crush energy calculation methods for use in accident reconstructions by finite element analysisIn refereedShusuke Numata, Koji Mizuno, Daisuke Ito, Dai Okumura, Hisashi KinoshitaSAE International Journal of Transportation Safety6,2,133-146-2018/10～10.4271/09-06-02-00092327-5634The crush energy is a key parameter to determine the delta-V in accident reconstructions. Since an accurate car crush profile can be obtained from 3D scanners, this research aims at validating the methods currently used in calculating crush energy from a crush profile. For this validation, a finite element (FE) car model was analyzed using various types of impact conditions to investigate the theory of energy-based accident reconstruction.
Two methods exist to calculate the crush energy: the work based on the barrier force and the work based on force calculated by the vehicle acceleration times the vehicle mass. We show that the crush energy calculated from the barrier force was substantially larger than the internal energy calculated from the FE model. Whereas the crush energy calculated from the vehicle acceleration was comparable to the internal energy of the FE model.
In full frontal impact simulations, the energy of approach factor (EAF) has a linear relation with the residual crush, which had been validated in previous experimental studies. In our study using FE analysis, we found that the slope of EAF versus the residual crush was comparable with that of the dynamic crush en
Two methods exist to calculate the crush energy: the work based on the barrier force and the work based on force calculated by the vehicle acceleration times the vehicle mass. We show that the crush energy calculated from the barrier force was substantially larger than the internal energy calculated from the FE model. Whereas the crush energy calculated from the vehicle acceleration was comparable to the internal energy of the FE model.
In full frontal impact simulations, the energy of approach factor (EAF) has a linear relation with the residual crush, which had been validated in previous experimental studies. In our study using FE analysis, we found that the slope of EAF versus the residual crush was comparable with that of the dynamic crush en
Academic presentation2018/8/27～
PapersIn refereedInternational coauthorship2018/8/1～10.1016/j.aap.2018.03.0290001-4575
International academic conferenceDevelopment of liver finite element models with vessel structures applied to car crash analysesDaisuke Ito, Yuichi Uchida, Koji MizunoICRASH Conference 20182018/7/25～
Academic presentationラット落下実験時の胸部応答に対する胸郭粘弾性特性の影響伊藤大輔, 一杉正仁日本バイオレオロジー学会誌(Web)32,2,94 (WEB ONLY)-942018/6/16～2186-5663
Academic presentation2018/5/23～
Academic presentation2018/5/23～
Academic presentationCo-authored2018/5/23～
Academic presentation2017/12/14～
Academic presentation2017/12/14～
Academic presentationCo-authored2017/12/14～
Academic presentation2017/9/4～
PapersIn refereed2017/7/25～
Academic presentation2017/6/1～
Academic presentation2017/6/1～
Academic presentationInternational coauthorship2017/5/24～
PapersProposal of a calculation method to determine the structural components' contribution on the deceleration of a passenger compartment based on the energy-derivative methodIn refereedKei Nagasaka, Koji Mizuno, Daisuke Ito, Naoya SaidaTraffic Injury Prevention18,sup1,S79-S84-2017/3/20～10.1080/15389588.2017.12969571538-9588In car crashes, the passenger compartment deceleration significantly influences the occupant loading. In this study, a calculation method to determine the structural components' contribution on the car deceleration, called energy-derivative method, was proposed. Using this energy-derivative method, the contribution of each component on the passenger compartment deceleration can be determined. Using finite element car models, this method was applied for full-width and offset impact tests.
The sum of the contribution of each component coincides with the passenger compartment deceleration in all types of impacts; therefore, the validity of this method was confirmed. In the full-width impact, the contribution of the crush box was large in the initial phases, and the contribution of the passenger compartment was large in the final phases.
Based on the energy-derivative method, the contribution of the components' deformation to deceleration of the passenger compartment can be calculated for various types of crash configurations more easily, directly, and quantitatively than by using conventional methods.
The sum of the contribution of each component coincides with the passenger compartment deceleration in all types of impacts; therefore, the validity of this method was confirmed. In the full-width impact, the contribution of the crush box was large in the initial phases, and the contribution of the passenger compartment was large in the final phases.
Based on the energy-derivative method, the contribution of the components' deformation to deceleration of the passenger compartment can be calculated for various types of crash configurations more easily, directly, and quantitatively than by using conventional methods.
Academic presentationBiomechanical effect on lumbar spine model after pedicle-lengthening osteotomyLei Qian, Koji Mizuno, Daisuke Ito, Jun Ouyang2017/3/14～Lumbar spinal stenosis is a common medical problem in elderly individuals and may lead to disabling neurogenic claudication. This study aimed to figure out the changes of kinematics and biomechanical effect on lumbar spine finite element (FE) model after pedicle-lengthening osteotomy by comparing them to the intact healthy male FE lumbar spine model.
A three-dimensional FE model of intact lumbar spine was constructed and the pedicle-lengthening osteotomy surgery was performed at L4 by using pedicle-lengthening screw.
The maximum change in stress of the intervertebral discs was -23.0% at L3 in flexion, -17.7% at L4 in extension, 6.5% at L5 in left bending, 13.5% at L5 in right bending, 13.4% at L4 in left rotation and 28.4% at L4 in right rotation.
Academic presentation2017/1/19～
Academic presentation2017/1/19～
Academic presentationCo-authored2017/1/19～
Academic presentation2017/1/19～
PapersIn refereedInternational coauthorship2017～10.1080/13588265.2016.12599521358-8265
International academic conferenceEffects of crash pulse on kinematic behavior and injury outcome in frontal impact considering pre-impact brakingDaisuke ITO, Takuya SANO, Kensuke KIDOMA, Koji MIZUNO2016 The International Forum of Automotive Traffic Safety (INFATS)2016/11/24～The First World Hotel, Hangzhou, ChinaThe effects of the change in posture due to pre-impact braking on the kinematic behavior were investigated
by using FE analysis and a human FE model. The full-width frontal impact and small-overlap
frontal impact were selected as the crash pulse. Spinal flexion and rotation angles were evaluated by using the
Euler angle. The neck extension, which was observed in dummy tests, was relatively small in the human FE
model simulation because of the upper body twisting behavior caused by the human spine flexibility.
International academic conferenceDevising a method to calculate the trajectory of a dummy's head using linear acceleration and angular velocityCo-authoredYuichi UCHIDA, Koji MIZUNO, Daisuke ITO, Ryoichi YOSHIDA2016 The International Forum of Automotive Traffic Safety (INFATS)2016/11/24～The First World Hotel, Hangzhou, ChinaThe method of calculating the head trajectory in three dimensions within the passenger compartment using the head and vehicle's acceleration and angular velocity in their respective local coordinate systems was constructed. To verify this calculation method, a crash simulation in LS-DYNA was conducted to compare the calculated and simulated result. Next, in order to demonstrate real-world usability of this method, the dummy's head trajectory was calculated using the linear acceleration and angular velocity of the dummy's head obtained from a sled test. The calculated result was then compared to the trajectory obtained from video analysis of the crash test. The possibility of obtaining the head trajectory in the global coordinate system from the local head's acceleration and angular velocity using LS-DYNA and MADYMO was also investigated. The head trajectory of a vehicle occupant with respect to the vehicle coordinate system and global coordinate system can be obtained using these methods.
PapersIn refereed2016/11～
Academic presentation2016/10/19～
Academic presentation2016/10/19～
Papers衝突被害軽減ブレーキによる歩行者の頭部保護効果の検証SEAH Reuben, 水野幸治, 伊藤大輔, 一杉正仁自動車技術会大会学術講演会講演予稿集(CD-ROM)2016,,ROMBUNNO.242-2016/10/17～2189-4558
Academic presentation2016/9/22～
Academic presentation2016/9/22～
PapersComparison of chest injury measures of hybrid III dummyIn refereedKoji Mizuno, Shogo Nezaki, Daisuke ItoInternational Journal of Crashworthiness22,1,38-48-2016/8/5～10.1080/13588265.2016.12155871358-8265The chest deflection and chest acceleration (3 ms) have been used as chest injury measures of Hybrid III dummy in frontal crash tests. In this research, the relationship between two chest injury measures was investigated based on finite element analysis of Hybrid III in a frontal impact. The equation of motion of the chest was established using the external (seatbelt force and airbag contact force) and internal forces (neck, shoulder joint, lumbar spine force) that are exert on the chest. The chest deflection is related to the external forces, and the chest acceleration is related to the external and internal forces. The influence that the restraint conditions (seatbelt path and force limiter) has on the chest acceleration and chest deflection was also investigated. The seatbelt path affected the rib cage deformation mode and the chest sternum deflection, but it has little effect of on the chest acceleration. Lowering the seatbelt force limiter value also reduced the chest deflection substantially, but it did not show any clear relationship with the chest acceleration since the kinematics and the internal forces of the Hybrid III dummy changed with varying force limiter values.
Academic presentation2016/5/25～
Academic presentation2016/5/25～
International academic conferenceThe Influence of Cyclist Lower Extremity Postures and Bicycle Velocity in Vehicle CollisionsInternational coauthorshipKoji Mizuno, Daisuke Ito, Hiroshi Mizuguchi, Han Yong2016 IRCOBI Asia Conference2016/5/16～In a vehicle-cyclist collision, cyclist kinematics are comparable with that of a pedestrian, except that the cyclist exhibits a pelvis slide behavior on the hood top [1]. A cyclist will assume various cyclic postures of the lower extremities while pushing on the pedals in a rotary motion when pedaling. It is not clear whether these lower extremity postures and velocities of the cyclist affect kinematics and injuries. In this study, the influence of lower extremity posture on cyclist kinematics and injuries was investigated with and without bicycle velocity.
International academic conferenceFinite Element Analysis for Understanding Trauma Brain Injury in JudoDaisuke Ito, Koji Mizuno, Masahito Hitosugi, Haruo Murayama, Katsuhiro Koyama2016 IRCOBI Asia Conference2016/5/16～In this study, head impact conditions in judo were reproduced with a human FE model, and brain kinematics and injuries were examined in order to understand head injury mechanisms in judo. A head FE model reflecting anatomical and mechanical characteristics was used. Experimental data of translational and rotational acceleration were input to the FE model. The brain strain distribution and some injury measures were investigated.
Academic presentation2016/3/17～
PapersInfluence of Lower Extremity Postures on Kinematics and Injuries of Cyclists in Car CollisionsIn refereed47,2,485-490-2016/3～A cyclist takes different postures of lower extremities while pushing the pedals. In this research, the kinematics of the whole body and injury risk of cyclist were examined for three representative postures of the lower extremities with and without cyclist traveling velocity. The knee height of the cyclist relative to the hood leading edge affected the kinematics and the head impact location against the car. The bicycle velocity influenced not only head impact location in the car lateral direction but also knee deformation.
Academic presentationReduction of Occupant Chest Deflection under High Deceleration Vehicle Crash PulseCo-authored2016/1/9～Occupant's chest injury is especially severe in the high deceleration vehicle frontal crash, therefore reduction of occupant's chest injury is needed for the occupant protection. In this research, a sled test under high deceleration crash pulse was reproduced to investigate the protection methods of occupant's chest under the high deceleration pulse. We validated the sled model by comparing with experimental result and examined the mechanism of chest deflection of Hybrid III dummy. It was showed that forward displacement of dummy's pelvis in high-deceleration sled model was larger than that in the small car model. This large forward displacement of pelvis caused larger inner shoulder belt force. It is needed to lower pelvis displacement to reduce dummy chest deflection.
PapersAnalysis on injury of vulnerable road users in traffic accidents with Japan Trauma Data BankIn refereed15,2,36-49-2016/1/6～
PapersEffect of Rotation of Passenger Compartment on Occupant Behavior in Vehicle ImpactsIn refereed47,1,171-176-2016/1～The objective of this study is to understand the effects of car rotation on occupant kinematic behavior in vehicle impact with rotation. The method to provide the boundary condition for the occupants under car acceleration and rotation was formulated. Small overlap frontal crash (yawing), full-width crash (pitching) and offset impact tests (yawing and pitching) were examined by FE model simulations. The vehicle yaw motions had a small effect on the occupant kinematics. The vehicle pitch motions mitigated the loading on occupants in a frontal crash since the anchor of the seatbelt moved with vehicle pitch rotation, which increased ridedown of the occupant.
PapersIn refereed2016～10.1080/15389588.2015.11266711538-9588
Academic presentation2015/10/14～
PapersChest Injury Criteria of Occupants in the Vehicle Frontal CrashIn refereed46,4,793-798-2015/7～Chest deflection and acceleration of crash dummy have been used as chest injury measures in frontal crash test. In this research, mechanism and relation of the two chest injury measures were investigated. The seat belt path and force limiter load were changed to clarify the effects on the chest injury by Hybrid III dummy and human finite element models. The chest acceleration was derived from external and internal joint force and the effect of seatbelt path was small, whereas the chest deflection was affected by the seatbelt force and the seatbelt path.
Academic presentationInternational coauthorship2015/5/20～
PapersFinite Element Analysis of Behavior and Injury of Cyclists in Car-to-Cyclist CollisionsIn refereed46,3,639-644-2015/5～Cyclists are frequently injured head and lower extremities in car-to-cyclist collisions. In this research, kinematic behavior of the whole body and the interaction of car, cyclist and bicycle were numerically investigated using a simulation with an FE simulation. Kinematic behavior of a cyclist was similar to that of a pedestrian, but the pelvis and head movement were different due to difference of posture of the lower extremities. Cyclist's tibia impacted to hood leading edge and shear loading was applied in the cyclist's knee, which can cause knee injury.
PapersIn refereed2015/4～10.1080/15389588.2014.9378051538-9588
PapersCyclist Head Protection with Helmet in Impact against A-pillarIn refereed46,2,1-8-2015/3/25～The head protection with cyclist helmets in impacts against the A-pillar was investigated from experiments and finite element (FE) analyses. In the A-pillar impact tests at 35 km/h, the HIC was above the injury acceptance level even with helmet. The FE simulations of the headform impacts indicated that the helmet liner deformed locally, whereas the A-pillar deformation was small. In the FE analysis of a human head model with a helmet, the skull fracture did not occur but the brain strain was large. From a simple model of the head acceleration, the helmet liner characteristics has a little effect on the HIC at high velocity impacts.
PapersEvaluation of thorax impact responses in rat drop tests and comparison with human finte element modelIn refereed14,2,15-21-2015/1/31～
Academic presentation2015/1/9～
Academic presentation2015/1/9～
Academic presentation2015/1/9～
PapersIn refereed2014/12～10.1016/j.aap.2014.09.0180001-4575
PapersBumper contact sensor for pedestrian collisions based on analysis of pedestrian kinematic behaviourIn refereedDaisuke Ito, Koji Mizuno, Takaharu Ueyama, Daisuke Nakane, Shingo WanamiInternational Journal of Crashworthiness19,5,514-523-2014/5～10.1080/13588265.2014.917493In this research, a pedestrian contact sensor based on the pressure of a deformable chamber was investigated from finite-element (FE) analysis. In a simulation of a component test of a chamber impact, the internal pressure of the chamber increased with the volume deformation of the chamber according to Boyle's law. The chamber was installed above the top plane of the bumper energy absorber of a simple car model, and FE simulations of a car-pedestrian collision were conducted. The chamber deformed and its internal pressure increased as the bumper energy absorber deformed during contact with the pedestrian leg. It was shown that the pressure response of the chamber could be detected, irrespective of vehicle shape and structure. This particular pressure response in pedestrian collisions was different from that in collisions into other objects such as a road pole. The contact force of the bumper energy absorber tends to be linear with the pressure change of the chamber. It was shown that a pedestrian collision can be distinguished with high reliability from other colliding objects using the chamber pressure based on the colliding characteristics depending on each colliding object.
Academic presentationCo-authored2014/3/18～
Academic presentation2014/1/11～
PapersIn refereed2014/1～10.1080/15389588.2013.7924081538-9588
Academic presentation2013/10/23～
International academic conferenceAn Inverse Finite Element Approach for Estimating the Fiber Orientations in Intercostal MusclesHamzah M, Subit D, Boruah S, Forman J, Crandall J, Ito D, Ejima S, Kamiji K, Yasuki TIRCOBI (International Research Council on Biomechanics of Injury) Conference 20132013/9/11～
International academic conferenceOccupant kinematic behavior and effects of a motorized seatbelt on occupant restraint of human volunteers during low speed frontal impact: mini-sled tests with mass production car seat.Ito D, Ejima S, Kitajima S, Katoh R, Ito H, Sakane M, Nishino T, Nakayama K, Ato T, Kimura TIRCOBI (International Research Council on Biomechanics of Injury) Conference 20132013/9/11～
International academic conferenceHyper-viscoelastic Response of Perfused Liver under Dynamic Compression and Estimation of Tissue Strain Thresholds with a Liver Finite Element ModelCo-authoredSato F, Yamamoto Y, Ito D, Antona-Makoshi J, Ejima S, Kamiji K, Yasuki TIRCOBI (International Research Council on Biomechanics of Injury) Conference 20132013/9/11～
International academic conferenceAssessment of a pre-crash seatbelt technology in frontal impacts by using a new crash test sled system with controllable pre-impact brakingCo-authoredIto, D, Ejima, S, Sukegawa, Y, Antona, J, Ito, H, Komeno, F23rd International Technical Conference on the Enhanced-Safety of Vehicles2013/5/27～
PapersIn refereed2013/1～
PapersEvaluation of mechanical propertiesof skeletal muscle with strain injuryIn refereedIto, D, Yamamoto, S, Tanaka, E, Mizuno, K, Hitosugi M, Tokudome, SJournal of Biomechanical Science and Engineering7,2,156-167-2012/3/13～10.1299/jbse.7.156
PapersIn refereed2011/1～
PapersIn refereed2010/1～10.1016/j.jmbbm.2009.05.0011751-6161
International academic conferencePathological change in muscle contusion with direct impact loadingCo-authoredYamamoto, S, Taniguchi, T, Ito, D, Mizuno, K, Tanaka, E, Hitosugi, M, Tokudome, SThe 14th European Society of Biomechanics Conference2004/7/4～
Courses Taught
- Industrial Products and System Safety
- Introduction to Safety Science II
- Introductory Seminar
- Mathematics I for Safety Science
- Practical exercise of Societal Safety Sciences
- Product Safety
- Advanced Seminar I
- Advanced Seminar II
- Graduation Thesis I
- Graduation Thesis II
- Assistant supervisors' seminar 2
- Injury Prevention Engineering for Safety Design
- Personal Information
- Research Activities
- Research Activities
- Community Service
- Courses Taught