Heavy Truck 180 Dynamic Rollover And Static Roof Crush Simulation
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Heavy Truck Crashworthiness Phase Ii
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Author : T. Kim Parnell
language : en
Publisher:
Release Date : 1996
Heavy Truck Crashworthiness Phase Ii written by T. Kim Parnell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Tractor trailer combinations categories.
Heavy Truck 180 Dynamic Rollover And Static Roof Crush Simulation
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Author :
language : en
Publisher:
Release Date : 1996
Heavy Truck 180 Dynamic Rollover And Static Roof Crush Simulation written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Tractor trailer combinations categories.
This report describes the work performed by Failure Analysis Associates, Inc. (FaAA), in Phase II of the SAE Heavy Truck Crashworthiness project. FaAA was charged with developing a computer model of a typical heavy-truck cab, verifying the cab's structural characteristics via comparison with actual test data, and using the model to evaluate performance of the baseline cab and a modified version in a simulated rollover accident.
Simulation Of Rollover With A Dynamic Roof Crush Test
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Author : Ulrich W. Seiffert
language : en
Publisher:
Release Date : 1972
Simulation Of Rollover With A Dynamic Roof Crush Test written by Ulrich W. Seiffert and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Automobiles categories.
Simulation Of Dynamic Rollover Threshold For Heavy Trucks
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Author : SAE International
language : en
Publisher:
Release Date : 2003
Simulation Of Dynamic Rollover Threshold For Heavy Trucks written by SAE International and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Tank trucks categories.
Vehicle Rollover Roof Crush Simulation And Surrogate Based Optimization
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Author : Vinay Nagaraja Rao
language : en
Publisher:
Release Date : 2006
Vehicle Rollover Roof Crush Simulation And Surrogate Based Optimization written by Vinay Nagaraja Rao and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Finite element method categories.
Comparison Of Jordan And Unconstrained Dynamic Rollover Tests Using Computational Finite Element Method
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Author : Sandeepa Udawalawwa
language : en
Publisher:
Release Date : 2019
Comparison Of Jordan And Unconstrained Dynamic Rollover Tests Using Computational Finite Element Method written by Sandeepa Udawalawwa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Electronic dissertations categories.
Rollover crashes are complex and relatively infrequent compared with other types of vehicle crashes, but they result in highest fatality rates among all common types of vehicle accidents. The Sport Utility Vehicles (SUV's) are the most common vehicles involved in rollover crashes compared to other vehicles. Different types of static and dynamic test methods have been proposed and implemented to evaluate the performance of a vehicle in rollover crashes. However due to complexity of rollover crashes, no specific dynamic method is required at present to evaluate the rollover crash and occupant protection responses, as a several factors could affect the rollover impact outcome. In this study, the finite element modeling and simulation of a typical SUV is first conducted for static roof crush test per regulatory Federal Motor Vehicle Safety Standards (FMVSS) 216. Once model evaluation and validation is completed, the finite element modeling and simulation of a simplified Jordan Rollover System (JRS) is conducted and the results are compared with these corresponding to an unconstrained rollover tests, both performed on the same SUV. A parametric study is conducted for pertinent dynamic rollover parameters such as drop height of the vehicle, and the platform floor speed. The results from the simulation test measurements including intrusion of roof components, reaction/contact force on the platform, roll angle, and roll rate of the vehicle, and the internal energy generated of the rollover are all examined and compared. Results from the simulations are analyzed to examine the significance of using either JRS or unconstrained rollover models. Recommendations are made based on initial rollover conditions for better dynamic approach and suggestion for test protocols or standards.
Numerical Analysis Of A Small European Vehicle Under Rollover Condition
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Author : M. Mao
language : en
Publisher:
Release Date : 2005
Numerical Analysis Of A Small European Vehicle Under Rollover Condition written by M. Mao and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Quasi-static and dynamic roof crush simulations have been carried out successfully on a small European car that was loaded at different pitch/roll angles. The results obtained were validated against the MIRA experimental dynamic roof crush outputs and against the Bolton experiments performed under FMVSS 216. Overall, the outcomes show that bonded windscreens contribute to nearly 30 per cent of the roof strength, thus confirming similar results obtained by a number of other researchers. Furthermore, these results show that roof strength is a function of roll and pitch angles which also greatly influence the overall intrusion rate. The new findings illustrate that, having a fixed loading pitch angle, the roof strength decreases when the roll angles are between 15 and 45deg;. If the pitch angle is increased, the same phenomenon of reduced strength is observed. However, this does not signify that the roof becomes weaker with increasing pitch angle, because there are limits within which this can occur, and hence the worst-case loading that yields the smallest strength is found at pitch 10deg; and roll 45deg;. Therefore, it is recommended in this paper that an update be made to the FMVSS 216, where a roll angle of 45deg; (not 25deg;) and a pitch angle of 10deg; (not 5deg;) be used as they constitute the worst-case loading condition. As a result, a more realistic test configuration with angles that replicate real-world accident data can be represented.
Rollover Of Heavy Commercial Vehicles
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Author : C.B Winkler
language : en
Publisher:
Release Date : 1999
Rollover Of Heavy Commercial Vehicles written by C.B Winkler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
A Tilt Table Procedure For Measuring The Static Rollover Threshold For Heavy Trucks
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Author : Truck and Bus Total Vehicle Steering Committee
language : en
Publisher:
Release Date : 1998
A Tilt Table Procedure For Measuring The Static Rollover Threshold For Heavy Trucks written by Truck and Bus Total Vehicle Steering Committee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
The test procedure applies to roll coupled units such as straight trucks, tractor semitrailers, full trailers, B-trains, etc. The test is aimed at evaluating the level of lateral acceleration required to rollover a vehicle or a roll-coupled unit of a vehicle in a steady turning situation. Transient, vibratory, or dynamic rollover situations are not simulated by this test. Furthermore, the accuracy of the test decreases as the tilt angle increases, although this is a small effect at the levels of tilt angle used in testing heavy trucks. The test accuracy is accepted for vehicles that will rollover at lateral acceleration levels below 0.5 g corresponding to a tilt table angle of less than approximately 27 degrees. Even so, the results for heavy trucks with rollover thresholds greater than 0.5 g could be used for comparing their relative static roll stability. The purpose of this SAE Recommended Practice is to provide an interim test procedure for using tilt tables to measure a static rollover threshold for heavy trucks.
Cab Roof Strength Evaluation Dynamic Loading Heavy Trucks
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Author : Truck Crashworthiness Committee
language : en
Publisher:
Release Date : 2004
Cab Roof Strength Evaluation Dynamic Loading Heavy Trucks written by Truck Crashworthiness Committee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
This SAE Recommended Practice describes the test procedures for conducting dynamic cab roofstrength tests for heavy-truck applications. Its purpose is to establish recommended test procedures which will standardize the procedure for heavy trucks. Descriptions of the test set-up, test instrumentation,photographic/video coverage, and the test fixtures are included.In 1998, SAE J2422 and J2423 were both issued. These RPs addressed test procedures for evaluating the roof strength of heavy trucks. The difference between the two was how the roof load was imposed. SAE J2422 applied a quasi-static load to the cab roof where as SAE J2421 applied a dynamic impact. In 2003, SAE J2422 incorporated pass-fail condictions that paralleled ECE Regulation 29. These also included a defined quasi-static roof load to be applied to the roof. At the same time, SAE J2423 was also changed to reflect some of the ECE Regulation 29 conditions, but did not establish a prescribed magnitude of the energy to be applied to the roof. In section 10 (Performance Requirements) of SAE J2423, it also states "This test procedure is for the purpose of informational studies only and is not an alternative to SAE J2422 due to the lack of the prescirbed magnitude of energy applied to the roof of the vehicle in the second impact." Since SAE J2423 is no longer an alternative to SAE J2422, there is no reason to keep both procedures active. Therefore it is recommended that SAE J2423 by cancelled as an active SAE RP.