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 30 for “"Airbag"”.
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Evaluation of Advanced Airbag Performance: Child Injury Exposure
Airbags save lives; however, first generation airbags resulted in unintended fatal and injurious consequences for children and small statured adults seated in front of them. An immediate solution allowed for the development of less aggressive airbags (second generation), a subsequent revision to …
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Airbag simulation utilising Arbitrary Lagrangian Eulerian methodology for Out Of Position cases
The deployment of car airbags can be lethal to an occupant of the vehicle whencaught Out Of Position (OOP) as the envelope can establish contact with the person beforecompletion of the explosive inflation process. This has resulted in severe injuries andfatalities in the past. The aim of this …
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Integrated optimization system for airbag design and modeling by finite element analysis
… is widely used in design and modeling of airbags in the automotive industry. Because an airbag is a three-dimensional structure capable of undergoing large deformations with non-linear material properties, usually commercial software is used to conduct the analysis. In recent years, some …
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An airbag-based crew impact attenuation system for the Orion Crew Exploration Vehicle
… Crew Exploration Vehicle (CEV), the concept of airbag-based crew impact attenuation was identified as being a potential means for providing a low mass, reconfigurable alternative to the currently baselined pallet-strut design. This thesis presents the development effort undertaken to determine …
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Motorcyclist neck protection system: Design and investigation of the effectiveness and feasibility of airbag integrated neck protection
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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The determination of optimal combinations of variables for nominal deployment and inflation of NASA's Mars Pathfinder Airbag Subsystem
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Upper Extremity Interaction with a Helicopter Side Airbag: Injury Criteria for Dynamic Hyperextension of the Female Elbow Joint
… upper extremity and a helicopter cockpit side airbag system and to develop dynamic hyperextension injury criteria for the female elbow joint. Part I involved a series of 10 experiments with an original Army Black Hawk helicopter side airbag. A 5th percentile female Hybrid III instrumented upper …
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Statistical Analysis and Computational Modeling of Injuries in utomobile Crashes
Although airbags have reduced the incidence of fatal and severe injuries in automobile collisions, they have been shown to increase the risk of less severe injuries. The purpose of this research was to investigate particular occupants and injury types in automobile crashes in order to identify …
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Influence of Advanced Airbags on Injury Risk During Frontal Crashes
The combination of airbag and seatbelt is considered to be the most effective vehicle safety system. However, despite the widespread availability of airbags and a belt use rate of over 85% U.S. drivers involved in crashes continue to be at risk of serious thoracic injury. One hypothesis is that …
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A Nonlinear Finite Element Model of the Human Eye to Investigate Ocular Injuries From Night Vision Goggles
Airbags have been saving lives in automobile crashes for many years and are now being used in helicopters. The purpose of this study was to investigate the potential for ocular injuries to helicopter pilots wearing night vision goggles when the airbag is deployed. A nonlinear finite element model …
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Characterisation of particulate matter originating from automotive occupant restraints
… in the UK, it was estimated that 6.5 million airbags required deployment at end of life. This process poses hazards such as that of occupational respiratory exposure to solid particulate matter (PM) effluents produced during the production of inflation gases for airbag deployment. To date …
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A Finite Element Model of the Pregnant Female Occupant: Analysis of Injury Mechanisms and Restraint Systems
… Unrestrained, 3-pt belt, and 3-pt belt plus airbag tests were simulated at speeds ranging from 13 kph to 55 kph. Peak uterine strain was found to be a good predictor of fetal outcome. The uterine strain sufficient to cause placental abruption was seen in simulations known to have greater than …
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Protection of Standing and Seated Pedestrians Using Finite Element Analysis
… because of head-ground contact. A lap belt, airbag vest, and bicycle helmet were tested on the seated pedestrians. The lap belt and airbag vest typically increased injury risks and the bicycle helmet reduced injury risks. The work presented in this dissertation may inform future modelers, …
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Predicting Occupant Injury with Vehicle-Based Injury Criteria in Roadside Crashes
… variation in occupant risk for unbelted, belted, airbag only, or belt and airbag restrained occupants. Through the use of Event Data Recorder (EDR) data coupled with occupant injury data for 214 real-world crashes, age-adjusted injury risk curves were developed relating vehicle-based metrics to …
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Design of a MEMS-based optical accelerometer with large measurable range and high sensitivity
… disturbances, to automotive industry such as airbag systems, active suspension, and smart braking. Traditionally, the acceleration is detected electrically by measuring either capacitive variations or piezoelectric signals. Those approaches suffer from a number of drawbacks, such as low …
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Finite element reconstruction of real world aortic injury in near-side lateral automotive crashes with conceptual countermeasures
… beam, crossbeam, side conceptual blanket airbag, thickness factor, yield strength and by varying the dimensions of the B-pillar beam, 18 DOCE simulations were carried out. The current study suggest that the protective effects of an improved side-construction standard can be enhanced …
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Simulated Automobile and Rotary-Wing Aircraft Impacts: Dynamic Neck Response after Surgical Treatment for Cervical Spondylosis
… a frontal impact of a belted driver with airbag deployment, a frontal impact of a belted passenger without airbag deployment, and an unbelted side impact. The measured neck forces and moments were compared to existing injury threshold values and used to calculate injury criteria values. …
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Evaluation of event data recorders in real world crashes and full-scale crash tests
… related parameters such as driver seat belt and airbag deployment status accurately in five of six tests as well.</p> <p>Comparison of EDRs with real world accident reconstructions was performed for 315 General Motors cases and 10 Ford cases from the National Automotive Sampling System …
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Effect of Belt Usage Reporting Errors on Injury Risk Estimates
… seat belt buckle status, pre-impact speed, airbag deployment status and front seat position. From this analysis we were able to conclude that EDRs were accurate, within 4.5%, when comparing maximum delta-V of EDRs that recorded the entire crash pulse length. We also determined that EDRs were …
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Biomechanical Responses of Human Surrogates under Various Frontal Loading Conditions with an Emphasis on Thoracic Response and Injury Tolerance
… knee bolster (KB), KB and steering wheel airbag (KB/SWAB), and knee bolster airbag and SWAB (KBAB/SWAB). The kinematic, lower extremity, abdominal, thoracic, and neck responses were then compared between surrogates and restraint conditions. In order to assess biofidelity, the ATD responses …
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