Download or read book Computational Modeling and Analysis of a Passenger Car Frontal Impact Per New FMVSS Offset Oblique and Small Overlap Tests written by Sagun Shrestha and published by . This book was released on 2015 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crash tests play a vital role in the design and development of new vehicles to ensure customer safety. The results obtained from the test programs such as the ones from the National Highway Traffic Safety Administration (NHTSA) are useful for further development of vehicles pertaining to consumer safety. The new and latest oblique offset and small overlap crash tests represent more realistic configurations of the frontal car impact accidents compared to earlier version of standards. In this study, finite element (FE) models of a family sedan car impact surroundings are utilized to reconstruct the tests. The objective of this study is to utilize computational modeling and analysis techniques to assess the performance of a typical sedan car per new small overlap frontal crash test and oblique offset tests, and to compare the results with the original rigid barrier impact crash test in terms of physical intrusion of the vehicle body parts and examining the corresponding potential injuries to occupants. The validation of the models are performed to ensure model accuracy and to check for any abnormalities in the FE models. In this research, the vehicle-to-barrier and vice versa models are simulated using the LS-DYNA nonlinear code. The full frontal impact crash tests are simulated according to the NCAP protocol. The oblique offset and small offset frontal impact tests are then investigated as they represent real-world scenarios better. The data obtained from the intrusions on the vehicle's A- and B- pillars, firewall, toe pan, knee bolster and steering column are analyzed. The results from different scenarios obtained are then compared in terms of intrusion and acceleration inside the car and the analysis of intrusion and occupant injury. It is observed that the small offset crash test adds more challenge not only to the structure of the vehicle but also to the design of seat belts and airbags. This study indicates that the compliance with the offset oblique and small offset frontal impact tests provide the best occupant protection where the occupant sustains maximum G- force especially in terms of head impact protection to the car's A-pillar.
Download or read book Performance Comparison of Human and Dummy Models in Various Vehicle Frontal Crash Scenarios Based on Federal Regulatory Standards written by Nitheesh Sasikumar and published by . This book was released on 2016 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Significant advancements in enhancing passenger safety and vehicle structures have been made in the automotive industry to protect the occupants and to minimize the injuries during crash events. Variety of crash tests, based on federal regulatory standards, have been performed with an end goal to examine the occupant kinematics and potential injury responses. Among different automotive crash scenarios, the frontal impact is the most common type of accident, which has been considered in this study. In recent years, computer-aided engineering tools have been extensively utilized in modeling, analysis and design of vehicle structures and occupant safety systems. The primary reason for the development and use of simulation models is to reduce the number of full-scale sled tests performed, which require vast flow time and are associated with significant cost. This thesis entirely focuses on the comparison of dynamic responses of human body models versus the crash dummy models in various vehicle frontal federal regulatory standards. For this reason, a ford taurus car representing a typical sedan has been considered as a medium. The simulation tests are conducted for the full frontal impact, small offset overlap impact and oblique impact configurations. A car interior environment is developed in MADYMO code, in which the human and dummy models are placed in. The acceleration acquired from the finite element analysis of frontal crash scenarios and the driver seat node are then input into the MADYMO code for both human and dummy models, and their kinematic responses are then compared. Per regulations, chest injury is considered to be a prominent factor in frontal crashes. Hence, the variations of chest deflection, chest acceleration and viscous criteria are investigated. The results from this study illustrate the potential difference between the human and dummy dynamic performances in various frontal crash scenarios. In particular, the differences in chest acceleration, chest deflection, and flexibility of spine are quantified.
Download or read book Preliminary Regulatory Impact Analysis written by and published by . This book was released on 1988 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Comparison of the NHTSA Research Offset Oblique and Small Overlap Impact Tests and the IIHS Moderate and Small Overlap Tests written by Joyce Lam and published by . This book was released on 2014 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Frontal Impact Test Data New Car Assessment Project Final Report written by Patrick M. Miller and published by . This book was released on 1980 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Side Impact Evaluation with High Performance Polymers and Improved Design of Impact Beam as Per FMVSS 214 Regulations written by Sree Surya Teja Kadiyala and published by . This book was released on 2021 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study describes the development of a new side-impact beam design with high-performance polymer/plastic materials. The new designs are analyzed and contrasted with the original side impact beam made from conventional steel material. The novel designs are assessed on a wide range of parameters to make sure that occupant safety is not compromised. Three different high-performance plastic materials (LCP-CF-30, PA6-CF-30, and PA66-GF-60) are considered. The methodological framework of Finite Element Analysis (FEA) is used for numerically computing, analyzing, evaluating, and refining the new side-impact bar designs. This study accordingly examines and quantifies the detailed effects of the collision on the side-impact beams of different designs. The design and the material with the desired result are then integrated into a typical passenger car Finite Element Model, and computational impact evaluation tests and analysis are carried out as per Federal Motor Vehicle Safety Standard (FMVSS-214). The results from the Moving Deformable Barrier (MDB) and the Rigid Pole tests, including parameters such as intrusions, accelerations, and ratings are determined as per Insurance Institute for Highway Safety (IIHS) side-impact structural safety guidelines. High-performance plastics-based side-impact beams are shown to exhibit considerable reductions in intrusions and accelerations in the tested FE models. Of all the designs and materials tested, the designs based on LCP-CF-30 material are shown to exhibit the most reductions in intrusion and accelerations on side-impact beams. Inferring from the MDB and Rigid Pole tests, the study concludes that the novel LCP-CF-30 based side-impact beam provides improved safety when contrasted with that of the original steel side-impact beam. This study also demonstrates that when used with appropriate designs, high-performance plastics can be quite effective in producing components with desired energy absorption capabilities and significant reductions in displacements and mass.
Download or read book Vehicle Collision Dynamics written by Dario Vangi and published by Butterworth-Heinemann. This book was released on 2020-01-15 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vehicle Collision Dynamics provides a unified framework and timely collection of up-to-date results on front crash, side crash and car to car crashes. The book is ideal as a reference, with an approach that's simple, clear, and easy to comprehend. As the mathematical and software-based modelling and analysis of vehicle crash scenarios have not been systematically investigated, this is an ideal source for further study. Numerous academic and industry studies have analyzed vehicle safety during physical crash scenarios, thus material responses during crashes serve as one of the most important performance indices for mechanical design problems. In addition to mathematical methodologies, this book provides thorough coverage of computer simulations, software-based modeling, and an analysis of methods capable of providing more flexibility. - Unifies existing and emerging concepts concerning vehicle crash dynamics - Provides a series of latest results in mathematical-based modeling from front and oblique perspectives - Contains almost everything needed to capture the essence of model development and analysis for vehicle crash - Includes both numerical and simulation results given in each chapter - Presents a comprehensive, up-to-date reference that encourages further study
Download or read book A Computational Methodology for Evaluation of the Structural Damage to a Car and Its Occupant Response for the New FMVSS 301R Regulation as Well as for Various Real world Rear end Collision Scenarios written by Vishal Jugge and published by . This book was released on 2017 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to requirements and continuous design improvement in automobile industries, it has become mandatory to keep passenger car and seating in automobile to safest at the time of a crash collisions. Although the rear-end collision stand third among all the different four collision types, the injuries on passenger after such collision are about one-third of all collisions. This indicates that improvement of passenger compartment crashworthiness features in rear collision is a mandatory goal for automobiles companies. In recent years, computer-aided engineering tool have become great success as the usage of such tools will not only significantly reduce the cost of performing real crash test, but also saves a lot of time. This thesis is mainly concentrated on the evaluation of structural damage to a small compact car in different possible rear end collision scenarios, then evaluation of responses and potential injuries of occupant with head restraint versus without head restraint. To achieve this, simulations are performed in the LS-DYNA with finite element (FE) models, rigid barrier as well as deformable barrier according to the Federal Motor Vehicle Safety Standards (FMVSS) 301R Fuel System Integrity regulations. Based on the acceleration obtained at the driver seat of target small vehicle, cabin environment which resembles driver seat is designed in MADYMO with five rigid bodies and with a FE model of the safety belt. A Hybrid III 50th percentile dummy model is placed in the seat, and the occupant responses are examined with input acceleration obtained from the earlier FE model rear end collision simulations. In addition to this rear collision configuration, rear offset collision, rear oblique collision and oblique offset collision are also modelled in software and examined. The results obtained from this study illustrate the difference in the structural damage and injury potential to the car occupant in rear-end collision between the new and old FMVSS 301 regulations, as well as different rear end collision scenarios.
Download or read book Prediction of Accident Severity and Driver Fatality Ratios in Side Impact Accidents for Different Target and Bullet Cars Based on the FMVSS 214 and US NCAP Test Conditions written by Lakshmi Venkata Sai Praneeth Chowdary Koneru and published by . This book was released on 2013 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: There have been many studies on side impact accidents, crashworthiness of car structures and occupant protection and safety. These studies have focused on either development of better car interiors, belts, airbag safety and seating system for passengers or on more energy absorbing car structures and stronger materials to withstand the accident. The National Highway Traffic Safety Administration (NHTSA) has developed metric method to quality and study the aggressive behavior of Light trucks and Vans (LTV's). One of the methods include driver fatality ratio (DFR) and Accident Safety (AS) by considering statistical data which was obtained from the accidents. The present research work proposes a computational method utilizing nonlinear finite element (FE) modeling of side impact crashes based on Federal Motor Vehicle Safety Standard (FMVSS) 214 and the United States New Car Assessment Program (USNCAP) conditions of several bullet and target vehicles. A computational finite element crash simulation methodology is initialized in this study include twelve cases, in which there are three target cars struck from side by four different bullet cars. The target cars include the Dodge Neon, Geo Metro and Toyota Yaris; and the bullet cars include the Dodge Caravan, Ford Econoline, Ford Explorer and Chevy S-10. The intrusions of the bullet and target cars are captured at specific locations. A scheme is then utilized to estimate the DFR based on the ratio of the bullet and target car intrusions, as well as the ratio of the accelerations at the driver seats corresponding to the two cars. The estimated DFR has been compared to the statistical DFR based on the accident data, and shown to provide reasonable correlation. The target vehicles in this study have been changed from the older models to a new model in order to observe any influence on the predicted DFR. The methodology presented here can be used in the design stage of new cars in order to improve the occupant protection and survivability of the passengers in the designed vehicles.
Download or read book Vehicle Crash Mechanics written by Matthew Huang and published by CRC Press. This book was released on 2002-06-19 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: Governed by strict regulations and the intricate balance of complex interactions among variables, the application of mechanics to vehicle crashworthiness is not a simple task. It demands a solid understanding of the fundamentals, careful analysis, and practical knowledge of the tools and techniques of that analysis. Vehicle Crash Mechanics s
Download or read book Analysis of Frontal Impact Test Data written by Patrick M. Miller and published by . This book was released on 1980 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Evaluation of Side Impact Protection written by National Highway Traffic Safety Administration and published by CreateSpace. This book was released on 2013-09-14 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Federal Motor Vehicle Safety Standard 214, “Side Impact Protection” was amended to assure occupant protection in a 33.5 mph crash test and phased-in to new passenger cars during model years 1994-1997. A Thoracic Trauma Index, TTI(d) is measured on Side Impact Dummies seated adjacent to the impact point. Manufacturers upgraded side structures and affixed padding in cars to improve TTI(d). Later, they installed two types of side air bags – torso bags and head air bags – for additional occupant protection in cars and LTVs. This report provides statistical analyses of 1993-2005 crash data from the Fatality Analysis Reporting System (FARS) and the General Estimates System (GES) estimate fatality reductions for these technologies.
Download or read book Evaluation of Structural Damage of a Small Car Collision Under FMVSS Side Impact Regulations and Comparison of Injury Response when the Driver s Seat is Displaced Laterally Inward written by Raheel Baig Mirza and published by . This book was released on 2017 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Safety of the car occupant is given foremost importance by the consumers, federal regulatory agencies, and automobile manufacturers. Many techniques and new technologies are proposed every year and implemented for the enhancements of the safety and crashworthiness of the vehicles. More efforts are still needed to make the cars safer, which in turn reduces the risk of fatal injuries to the occupants. In this study, a typical compact-sized sedan model is analyzed for the Federal Motor Vehicle Safety Standards (FMVSS) 214 Moving Deformable Barrier (MDB) and, Side Pole impact collisions, via numerical simulations. In particular, the effect of placement of the driver's seat laterally inward is investigated. A methodology is presented in this thesis to examine the structural damage experienced by the car when it is engaged in side collision with a rigid pole and the MDB barrier, and also to assess the injuries sustained by the driver in both scenarios. In order to delay the contact, a seat position is modified to provide during a side impact with an additional 18mm clearance between the seat and struck door. The National Crash Analysis Center (NCAC)'s Toyota Yaris finite element (FE) model have been utilized in this thesis to analyze the structural side impact responses of this compact sedan. The EuroSID-2re 50th percentile adult male side impact crash test dummy has been as the car occupant. The critical injury parameters of the dummy and the vehicle deformation are evaluated and compared. This study indicates that a small inward lateral displacement of the driver's seat towards the interior of the car can significantly reduce the potential injuries to the occupant. This is due to the fact that most of the energy of impact is absorbed by the vehicle side structure instead of the seat structure and the occupant.
Download or read book Dynamic Analysis of Head Contact with Vehicle Interior in Car Collisions written by Ajay Udaykumar Hingne and published by . This book was released on 2004 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Frontal Crash Responses Car to car Offset Frontal Crash Test of Two 1984 Honda Accord with a Closing Velocity of 59 3 Mph Test Report written by B. Wade and published by . This book was released on 1985 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Frontal Crash Responses Car to car Offset Frontal Crash Test of a 1983 Renault Fuego Into a 1984 Honda Accord with a Closing Velocity of 58 7 Mph Test Report written by B. Wade and published by . This book was released on 1985 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Literature Abstracts written by Society of Automotive Engineers and published by . This book was released on 2000 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
