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 20 of 28 for “"Hybrid III"”.
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Development of a Deflection Measurement System for the Hybrid III Six-Year Old Biofidelic Abdomen
… of the current anthropomorphic test device, the Hybrid III 6-year-old, needs improvement. Further, measurement of abdominal deflection is needed for quantification of the degree of submarining and associated potential injury risk. A biofidelic abdomen for the Hybrid III 6-year-old dummy is being …
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The Influence of Impact Mass, Inbound Velocity and System Compliance on the Dynamic Response of a Hybrid III Head Form
… of impact mass on the dynamic response of a Hybrid III head form. This was carried out by impacting the front location of the un-helmeted head form over a range of inbound velocities (2.0 m/s, 3.0 m/s and 4.0 m/s) and system compliances (rigid neck, compliant neck and unrestrained head and …
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Biomechanical Response of Human Volunteers and Surrogates in a Variety of Loading Regimes
… the dynamic responses of human volunteers, Hybrid III ATD, and PMHSs in low-speed frontal sled tests; quantify the neck response of human volunteers and PMHSs in low-speed frontal sled tests; quantify the kinetic and kinematic responses of PMHSs and the Hybrid III ATD in high-speed frontal …
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Laboratory and Field Studies in Sports-Related Brain Injury
… commonly used in athletic helmet testing, the Hybrid III and NOCSAE headforms. One study compared the headform shape, particularly looking at regions that are likely to affect helmet fit. Major differences were found at the nape of the neck and in the check/jaw regions that may contribute to …
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Cervical Spine Tolerance And Response In Compressive Loading Modes Including Combined Compression And Lateral Bending
… assessment reference values (IARVs). As the Hybrid III ATD continues to be used in automotive rollover applications, interpretation of measured neck loads in this testing mode would be aided by a better understanding of human cervical spine response and tolerance in compression dominated …
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Vibrational Characteristics of Dummy Headforms
The Hybrid III and NOCSAE headforms are two headforms used in impact testing, though their vibrational characteristics are not well understood. They may have different kinematic responses in various impact scenarios if the impact excites any of their natural frequencies; resonance is especially …
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Development and Validation of a Finite Element Dummy Lower Limb Model for Under-body blast Applications
… 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 military vehicle safety and make informed …
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Quantifying the Kinematics of Injury Biomechanics: Several Applications Incorporating Human Volunteers and Surrogates
… sled tests performed with human volunteers, a Hybrid III 50th percentile male ATD, and post mortem human surrogates (PMHSs). The first study sought to investigate the effects of muscle bracing by human volunteers. The second study sought to compare the responses of the relaxed and braced …
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Investigating the Thoracic Biomechanical Responses of Rear Seated 50th Percentile Male Anthropomorphic Test Devices and Post Mortem Human Surrogates During Frontal Motor Vehicle Collisions
… responses of two frontal ATDs, i.e., the Hybrid III and THOR-50M 50th percentile male ATDs, and 50th percentile male post mortem human surrogates (PMHS) seated in the rear seat of modern vehicles, which have various seat geometries and restraint types, during frontal MVCs. Emphasis is …
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Submarining and Abdominal Injury for Rear-Seated Mid-Size Males during Frontal Crashes
… sled tests were conducted with the THOR-50M and Hybrid III 50th-percentile male ATDs in three crash conditions and seven modern vehicles. The vehicles included a minivan, an SUV, 3 compact SUVs, and 2 sedans from the US vehicle fleet (model years 2017-2018). Four vehicles had conventional …
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Head and Neck Injury Risk Predicted by Finite Element ATDs and Human Body Models in the Aerospace Landing Environment
… injury is not complete. Currently, the Hybrid III and Test Device for Human Occupant Restraint (THOR) are in use for assessing injury risk to future occupants of spaceflight vehicles, but both were developed for primarily frontal MVC conditions and scenarios much more severe than those …
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An Analysis of Catcher's Mask Performance to Attenuate Head Accelerations
… at an instrumented (3-2-2-2 accelerometer array) Hybrid III headform (a 50th percentile male head and neck) with and without a catcher's mask on the head. The ball speed was controlled from approximately 26.8 – 35.8 m/s (60 – 80 mph) and regulation NCAA baseballs were used. Peak linear resultant …
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Development and Implementation of Laboratory Test Methods for the Evaluation of Wearable Head Impact Sensors
… used to impact a NOCSAE headform mounted on a Hybrid III neck. Sensors were tested under helmeted and unhelmeted conditions, according to their prescribed use. The headform was impacted at four locations, each at four impact energies ranging from 25 g to 100 g. Peak and time series headform …
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Football Shoulder Pad Design and Its Effect on Head Kinematics in Shoulder-to-Helmet Impacts
… head kinematics. Participants struck a helmeted Hybrid III dummy with a National Operating Committee on Standards for Athletic Equipment (NOCSAE) on the side, replicating a lateral STH impact. Linear and rotational kinematics of the struck head were recorded for each impact, and impact speed was …
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Quantifying the Effect of Helmet Fit on Performance
… strike a helmeted NOCSAE headform mounted on a Hybrid III neck. Helmets were impacted at 4 locations at 3 energies representing a range of concussive to sub-concussive impacts. The fit conditions evaluated in this study represent fitting scenarios in which an athlete is provided a helmet that is …
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Evaluating the Head Injury Risk Associated with Baseball and Softball
… four objectives: to compare the responses of the Hybrid III and NOCSAE headforms during high velocity projectile impacts, to compare head injury risk across a range of baseball stiffness designed for different age groups, to evaluate the effectiveness of infielder softball masks' ability to …
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The Etiology of Impact Related Concussion for Catchers and Umpires in Baseball
… to shoot baseballs at the instrumented head of a Hybrid III dummy. Head accelerations were calculated from a 3-2-2-2 accelerometer array to allow for comparisons of linear and angular kinematics. 6 common masks (2-piece traditional-style and 1-piece hockey-style) were tested at 7 locations at 60 …
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Lightwave circuits for integrated Silicon Photonics
… enable non-linear processes the integration of a hybrid III-V-silicon mode-locked laser has also been studied. During this study, technological novelties have also been developed by modelling the wedge profile obtained during the wet etching of silicon glass materials to engineer 3D structures. In …
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A Comparison of Brain Trauma Characteristics from Head Impacts for Lightweight and Heavyweight Fighters in Professional Mixed Martial Arts
… 345 exemplar impacts in the laboratory using a Hybrid III headform and finite element modeling to determine impact magnitudes. Next, head impacts (punches, kicks, knees and elbows) from fight videos were visually estimated to determine their corresponding magnitude range and establish the …
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Analysis of Force-Limiting Capabilities of Football Neck Collars
… called the Kerr Collar. This study utilized a Hybrid-III 50th percentile male outfitted with a standard collegiate football helmet and shoulder pads, and impacted with a linear pneumatic impactor. Forty eight total impacts were performed; impacts were performed at side, front, and axial loading …
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