Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"impact biomechanics"”.
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Hip fracture and fall impact biomechanics
Thesis (Ph. D.)--Massachusetts Institute of Technology, Whitaker College of Health Sciences and Technology, 1994.
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Head Impact Biomechanics and Helmet Performance in Youth Football
… thesis aims to improve the knowledge of head impact biomechanics in youth football players by analyzing head impact exposure of youth football players and the performance of youth football helmets. The results of the studies presented provide a foundation for researchers, football leagues, and …
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Impact Biomechanics of the Head and Neck in Football
The research presented in the thesis explores the biomechanics of the head and neck during impacts in football. The research related to the head is geared towards advancing the current understanding of the mechanisms of mild traumatic brain injury, specifically by investigating head accelerations …
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SEX DIFFERENCES IN HEAD IMPACT BIOMECHANICS AND QUANTITATIVE FUNCTIONAL DEFICITS DUE TO REPETITIVE LOADING IN HIGH SCHOOL SPORTS
There are an estimated 1.6 – 3.8 million sports- and recreation-related concussions in the US each year, and adolescents are particularly vulnerable due to high participation in sports and prolonged recovery periods when injured. Female athletes have higher concussion rates in sex-equivalent sports …
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Head Impacts in Hockey and Youth Football: Biomechanical Response and Helmet Padding Characteristics
… is aimed at increasing the understanding of head impact biomechanics across a broad spectrum of impact scenarios as well as the ability of helmets to affect head impact biomechanics over time. The first study utilizes in situ testing of controlled impacts of an instrumented head form to more fully …
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Head Acceleration Measurements in Helmet-Helmet Impacts and the Youth Population
… measurements of the head during helmet-helmet impacts, where a player's helmet impacts another player's helmet, and with a youth population in football. This research is aimed at advancing current understanding of impact biomechanics for two specialized groups. The first study is an …
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Investigation of wound characteristics and the force associated with skull fracture due to impact by a hammer
… head is however no less important and is often impacted during homicidal assault. In cases involving cranial blunt force trauma, a common question asked of experts relates to the amount of force involved with a particular trauma. The goal of forensic science in general is to provide objective, …
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Evaluation of the Protective Capacity of Ice Hockey Goaltender Masks for Three Accident Events using Dynamic Response and Brain Stress and Strain
… masks. In ice hockey, goaltenders are exposed to impacts from collisions, falls and projectiles. The objective of this study was to assess the protective capacity of ice hockey goaltender masks for three accident events associated with concussion. A helmeted and unhelmeted medium NOCSAE headform …
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Development and Validation of a Child Finite Element Model for Use in Pedestrian Accident Simulations
… However, with exception of a child headform impact test, all other subsystem tests are designed for prediction of adult pedestrian injuries. Due to differences in impact location and material properties, existing subsystem tests and dummies designed for adult pedestrian cannot be used for …
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Development and Validation of Human Body Finite Element Models for Pedestrian Protection
… Car-to-Pedestrian Collisions (CPC), subsystem impact tests, using impactors corresponding to the pedestrian's head and upper/lower leg were included in regulations. However, these simple impact tests cannot capture the complex vehicle-pedestrian interaction, nor the pedestrian injury …
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Exploring the Link Between E-scooter Crash Mechanism and Injury Outcome Using Finite Element Analysis
… were simulated numerically across different impact speeds, approach angles, and stopper heights to characterize their influence on rider injury risk during falls. A finite element (FE) model of a standing Hybrid III anthropomorphic test device was used as the rider model after being …
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Development, Calibration, and Validation of a Finite Element Model of the THOR Crash Test Dummy for Aerospace and Spaceflight Crash Safety Analysis
… validated for use in aerospace and spaceflight impact analysis. A previously developed THOR FE model was first evaluated under spinal loading. The FE model was then updated to reflect recent updates made to the THOR dummy. A novel calibration methodology was developed to improve both kinematic …
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Protection of Standing and Seated Pedestrians Using Finite Element Analysis
… United States pedestrian fatalities in vehicle impacts have increased over the last 40 years and pedestrians who use wheelchairs (seated pedestrians) have higher mortality rates than standing pedestrians in vehicle impacts. Standing pedestrian protection has generated increased attention and …
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Development and Validation of a Finite Element Dummy Lower Limb Model for Under-body blast Applications
… for decades to quantify human injury during an impact and assess safety measures. Currently the Hybrid III ATD is used in live-fire military vehicle assessments. However, the Hybrid III was designed for frontal impacts and demonstrated poor biofidelity in vertical loading experiments. To assess …
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Investigation of Small Remotely Piloted Aircraft System (sRPAS) to Human Head Impact
… aircraft system (sRPAS) to ground human head impact could cause injuries to the public. Skull fractures and brain injuries have been observed in sRPAS-related impacts, which varied in angles, locations and velocities. This study developed a representative quadcopter sRPAS finite element model …
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The Role of Local Material Properties in Modeling Fracture Tolerance of the Human Thorax
… modeling for both frontal and lateral impacts illustrate that the location and number of rib fractures are altered by the inclusion of rib material properties that vary by region. A sensitivity analysis of the effects of altering the failure strain criteria on the number of rib …
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Finite element reconstruction of real world aortic injury in near-side lateral automotive crashes with conceptual countermeasures
… In the first study eight nearside left lateral impacts, in which a TRA occurred, were reconstructed using a combination of real world crash data reported in the Crash Injury Research and Engineering Network (CIREN) database and FE models of vehicles and occupants. The average maximum principal …