Author: G. F. SyrowikPublisher:
ISBN:
Category :
Languages : en
Pages : 10
Book Description
Energy-absorbing Polyurethane Foam to Improve Vehicle Crashworthiness
Author: G. F. SyrowikImprovement in Crashworthiness of a Vehicle for Side Impact Occupant Protection Using IMPAXX and Polyurethane High Energy-absorbing Foam Materials
Author: Saketh Reddy MuthyalaPublisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 72
Book Description
Side impact car crashes account for roughly 30% of all fatalities in road accidents including passenger cars and light trucks, and they tend to have a disastrous effect on the human body than all other types of car accidents due to very less crumple zone. In consideration of all this, even in the lower end and higher end vehicle segments, active safety systems are incorporated more often for side impact protection. However, there is still a large number of vehicles built without side airbags, in specific regions such as North America and emerging markets. Therefore, it is still necessary to engineer passive safety measurement by utilizing safety countermeasures, such as foams solutions to protect the occupant during side impact collisions. The present study is focused on investigation of the advantage of applying high efficient energy absorption foams for side impact protection of car occupants. First, the characteristics of high energy absorbing foam models are examined by finite element analysis and simulations of the Drop Tower Tests and the Free Motion Headform tests. After ensuring material models behavior, the design of the current B-pillar is altered by adding foam into its cavity. Subsequently, side impact test simulations of a typical passenger car with a moving deformable barrier, as per NHTSA and IIHS safety regulations, with the current and modified B-pillar are conducted. In the end, various injury criteria are evaluated by positioning a ES-2re finite element dummy model with, a three-point lap and shoulder seat belt into the driver seat. The study demonstrates that the potential for the use of high-energy absorbing foam for side impact protection.
Polyurethane
Author: Fahmina ZafarPublisher: BoD – Books on Demand
ISBN: 9535107267
Category : Science
Languages : en
Pages : 484
Book Description
The enchanting and worthy world of PU beckoned to bring forth the book titled "Polyurethane". The book is divided into three sections: structures, properties and characterization of PU, applications of PU and a separate section on Biobased PU, covering the research and development in these areas. Each contributed chapter handles new and interesting topics introducing the reader to the wider known and unknown applications of PU such as PU for grouting technologies, fuel binder, extraction of metals, treatment of industry wastewater, alkanolamide PU coatings and foams, and others. The book aims to cater a larger audience comprising of readers from polymer chemistry, materials chemistry, and industrial chemistry.
Performance Evaluation of Thin Walled Tube Filled with Nano Based Polyurethane Rigid Foam for Increased Roof Strength of a Vehicle
Author: Anush Kumar MalliPublisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 72
Book Description
Automotive crash has garnered significant attention in the recent years with increasing fatality and safety concerns. Substantial effort and great amount of time and expertise has been directed towards the issues related to crashworthiness such as impact, rollover scenarios and restraint performance. Automotive rollover is one of those important concerns for the auto industry as the fatality rates and death causing conditions are vital compared to other crashes. In the past few decades, research has been focused towards developing efficient roof structure by implementing crashworthy structures, to protect or at least reduce the severity of the accident to the occupants of the vehicle during an event of a rollover. Studies have been carried in this area in developing efficient crashworthy structures. As the technology is evolving, researchers have found that thin walled tubes filled with foam materials possess high energy absorption properties compared to empty crashworthy structures. Further research in this has area led to the interference of nanotechnology, which implements emerging techniques in developing advanced materials for engineering applications. Scientists were able to develop low density, lightweight foams with high energy-absorption characteristics with these techniques. The purpose of this thesis is to analyze and evaluate the performance of low density carbon nanofoam (CNF) as an energy absorbing material in improving the roof strength of the vehicle. The LS- DYNA code, a non-linear dynamic finite element solver is utilized to accomplish this study. First, a three- point bending test simulation is carried as component level testing to analyze the behavior of foam materials. Then, the energy absorbing characteristics of a hollow tube is studied and the results are compared with regular polyurethane (PU) foam and carbon nanofoam inserts into the hollow tube, under similar conditions. Finally, PU foam and CNF is applied into the critical areas of roof supporting structures as two different conditions and static roof crush and dynamic inverted drop test simulations are conducted depicting an actual rollover scenario to study the crashworthy behavior of the vehicle roof with and without the foam. This study highlights that carbon nanofoam is found to be more effective compared to the regular polyurethane foam exhibiting better energy absorption characteristics.
Crashworthiness of Motor Vehicles: a Bibliography
Author: L. Flynn (comp)The Intelligent Safety of Automobile
Author: Jianqiang WangPublisher: Springer Nature
ISBN: 9819963990
Category : Technology & Engineering
Languages : en
Pages : 672
Book Description
The book expounds the current research and development trend of intelligent safety technology of automobile, and analyzes and excavates the new safety technology to the automobile. It introduces the basic theory, core method, key technology, main system, test evaluation and innovation practice of intelligent safety of automobile for readers, providing a certain theoretical and practical basis for the safety development of the automobile.This book is elaborated from the perspective of the driver-vehicle-road system. The traffic accidents are divided into three stages for discussion: before, during and after the collision. This book constructs a new systematic structure for Safety theory and technical system of several key links, including system safety, operation safety, intelligent protection and safety evaluation. It will be a useful reference for researchers and practitioners in the field of automobile engineering and auto pilot.
Crashworthiness
Author: Jorge A.C. AmbrosioPublisher: Springer
ISBN: 3709125723
Category : Science
Languages : en
Pages : 462
Book Description
From the fundamentals of impact mechanics and biomechanics to modern analysis and design techniques in impact energy management and occupant protection this book provides an overview of the application of nonlinear finite elements, conceptual modeling and multibody procedures, impact biomechanics, injury mechanisms, occupant mathematical modeling, and human surrogates in crashworthiness.
A Study of Rigid Polyurethane Foam. Volume I - Summary Report. Final Report
Author: V. A. GrassoHighway Safety Literature
Author: Structure and Energy Absorbing Properties of a Polypropylene and Polyethylene Terephthalate Fiber Composite Material
Author: Tammy Sue CummingsPublisher:
ISBN:
Category : Composite materials in automobiles
Languages : en
Pages : 270
Book Description