CRASHWORTHINESS OF FORD F250® TRUCK “ROLL OVER –INVERTED VEHICLE DROP TEST (SAE J996)” by Pritesh K Shah B.E. Mechanical Engineering, January 2003, Pune University, INDIA A Project Report Submitted to the Faculty of Old Dominion University in Partial Fulfillment of the Requirement for the Degree of MASTER OF ENGINEERING in DESIGN & MANUFACTURING MECHANICAL ENGINEERING OLD DOMINION UNIVERSITY August 2011 [pic] ME-11-0082 CRASHWORTHINESS OF FORD F250® TRUCK “ROLL OVER –INVERTED VEHICLE DROP TEST (SAE J996)” by Pritesh K Shah B.E. Mechanical Engineering, January 2003, Pune University, India A Project Report Submitted to the Faculty of Old Dominion University in Partial Fulfillment of the …show more content…
Rollover crashes constitute to a meager 2 percent of all collisions and yet account for 24 percent of passenger fatalities. Rollovers are one of the most dangerous forms of vehicle crashes because of the high occurrence of occupants catastrophic head injuries and fatalities. [pic] Figure 1 Highway rollover fatalaties In 2007, the National Highway Traffic Safety Administration (NHTSA) made it mandatory that all vehicles to be equipped with electronic stability control (ESC). By the 2008 model year, ESC was standard on 65 percent of passenger cars, 96 percent of SUVs and only 11 percent of pickups. The ESC technology helps minimize skidding, as well as maintains control when drivers swerve. ESC senses when a driver may lose control and automatically applies brakes to individual wheels (Outer front wheel to counter over steer or inner rear wheel to counter under steer) to help stabilize the vehicle and avoid a rollover [6]. Considerable research has been undertaken over the years to differentiate rollover according to severity and to develop a standard rollover test. In most cases the studies are applicable to passenger cars. However, many of the
Vehicle crashes are the leading cause of teen deaths. According to the National Highway Traffic Safety Administration 2011 statistical analysis, there was 1,237 fatalities involving young drivers between the ages of 17-19. On average, 30% of those vehicle fatalities were
Crossing the median can have deadly consequences, as the above accident demonstrates. When one vehicle crosses into the wrong lane, it is likely to hit another vehicle head on. Head-on collisions account for only two percent of car accidents but head-on collisions result in ten percent of fatalities from traffic accidents. One reason a head-on collision is deadly is it is as if the driver’s vehicle ran into a brick wall because both vehicles are moving forward at time of the impact. This increases the severity of the collision. Even at low speeds, a head-on collision can be deadly.
Even an experienced commercial or owner operator truck driver who has sound judgment can make rookie mistakes that may cause a rollover when he's fatigued, distracted, impatient, rushed, or angry. These emotional, mental, or physical states make him vulnerable to these four common truck rollover scenarios:
Wouldn't you think that most car crash deaths would happen to the driver? Not really, most deaths by crashes happen to the passenger. In most cases the driver looks up as the crash is occurring so they don't have much time to stop or break the car. The driver is not aware of their surroundings so often they don't know where the cars around them are.
Ask any driver who spends hours on the road each day driving a big rig, how safe the roads are and you are likely to get an ear full of the close calls they have had while driving. Driving a large eighteen-wheeler with a load on the back can be dangerous on its own. Add in some crazy drivers, obstacles in the road, and sketchy streets and you have a much more dangerous situation. With advancement in technology within the trucking industry, truckers can now feel safer than ever. It also doesn’t hurt that these improvements can help keep trucking insurance lower. Here are 4
According to the National Highway Traffic Safety Administration (NHTSA), approximately 342,000 large trucks were involved in traffic collisions in the United States during 2013. From the data collected by the NHTSA, seventy-one percent of truck accident fatalities were people in other vehicles and seventy-two percent of the injuries were sustained by occupants of other vehicles. This disparity between truck drivers and occupants of other vehicles is likely caused by the difference in weight and size between commercial trucks and passenger vehicles.
TBI was performed in accordance with the protocol described elsewhere.[17,18] Rats weighing (250-300 g) were anesthetized using a mixture of ketamine (75 mg/kg i.p.) and xylazine (5 mg/kg i.p.). A 1 cm midline scalp incision was made and the muscles were retracted to expose the skull. A stainless steel disc (10 mm in dia. and 3 mm in depth) was placed centrally between the lambda and bregma sutures. Injury was then induced using impact acceleration model of TBI. A 400 g metal weight was dropped from a height of 1 m guided through straight pipe (Length: 1 m; Diameter: 35 mm), onto the metal disc placed over the rat’s skull. A 10 cm foam bed underneath the animal helped to absorb the impact.[19] After the impact, the metal disc was removed and
Another social aspect is the danger it can put other drives in if they “roll over” or have an accident. A top U.S. auto-safety regulator said SUV and pickup trucks aren't safe enough due to rollover risks and consumers should think twice about buying them. "The thing I don't understand is people, when they choose to buy a vehicle, they might go sit in it and say, 'Gee, I feel safe,'" said Dr. Jeffery Runge, head of the National Highway Traffic Safety Administration, “Well, sorry, but you know gut instinct is great for a lot of stuff, but it's not very good for buying a safe automobile." Runge, who served as an emergency room physician for 20 years before becoming head of the NHTSA, said SUV drivers are especially vulnerable to fatal rollovers because the vehicles' high center of gravity makes them more likely to tip during sudden maneuvers. Runge also added that rollovers accounted for just 3 percent of all U.S. auto accidents in 2001 but caused nearly a third of all vehicle-occupant fatalities, and an SUV occupant were more than three times more likely to die as a result of a rollover than an occupant of a passenger car. (NHTSA: SUVs not safe enough , 2003) Some sickening facts, of the estimated 6,394,000 police-reported motor vehicle traffic crashes during 2000, 41,821 people were killed -- an increase of 0.2 percent over 1999. 3,189,000 people were injured in motor vehicle traffic crashes and 4,286,000
The traction control and stability control systems have also been invented in the lab. Traction control was created in 1985 and like the ABS, didn't make it to the states for a few years. This system works by taking away the power from the wheels when they start to spin. This allows the wheels to make a more solid contact with the road to help the driver better control the vehicle upon takeoff. Similar to traction control, but created ten years later in 1995 by Bosh is the electronic stability control or also known as ESC. Unlike traction control, ESC is used while the vehicle is driving down
Car mishaps are the leading cause of death for teens. It has become a huge factor affecting both the driver and passengers.
There is nothing scarier than a commercial truck whose brake has failed, veering towards you. The dangers they pose are innumerable, as the truck drivers lose control of the truck, and are only left with hope to remedy the situation. It is sad when commercial truck brake failures cause accidents because brake failures can be avoided if proper maintenance is adhered to, and the trucks are driven by trained drivers. A frightening fact about this is the frequency with which it occurs; the Department of Transportation sponsored a study that revealed that the percentage of commercial truck accident caused by brake failure is about 29.4%. This figure represents a percentage of commercial truck accident that could have been
Background and Audience Relevance: According to National Highway Traffic Safety Administration, in 2015, about thirty-five hundred people were killed, and four hundred thousand were injured in car crashes.
Car accidents can happen to drivers anytime, anywhere. "According to the National Safety Council, which stated that more than 2.5 million collisions back every year, making it the most common type of car accidents, it is also known that the accident rear end as incidents of injury, because the nature of the collision leads often in whiplash injury the driver in the car in front and about 20% of people who participated in a rear collision injury symptoms of this kind. ", (NHTSA, auto-accident-resource.com). Among the car accidents, the teenage group is the only age group who is number of deaths is increasing instead of decreasing. Also, all the people are exposed to risk and actually every one of them has got car
ESC systems sense parameters such as yaw rate, steering wheel angle and lateral acceleration in order to detect differences between the intended and actual path of the vehicle. The system is then linked to the ABS and engine management system in order to differentially apply the brakes and/or reduce the engine power to individual wheels, thus generating yaw moments to correct the vehicles path. These systems are known by a variety of other proprietary names such as Vehicle Dynamic Controller (VDC) and Vehicle Stability Control (VSC) but are referred to generically as ESC in this report. Market penetration of ESC systems was estimated at 27% in Europe in 2002, and is expected to reach 50% in Europe by 2007 (Reed Electronics Research, 2003). Previous research indicates that ESC significantly reduced instability in test manoeuvres where substantial instability was encountered. It also suggests that ESC does not influence vehicle behaviour when a driver attempts to operate outside the physical limits of the vehicle. No significant disbenefits of ESC systems were found, and clear evidence of positive influence on safety and accident reduction was cited (Grover & Knight, 2005). ESC is also now “strongly recommended” to all consumers by the EuroNCAP organisation (EuroNCAP, 2005). It is suggested that ESC must work to constrain vehicle behaviour to that expected by normal human driving behaviour. It does this either by producing similar
Whiplash is one of the most common types of auto accident injuries. In fact, it is estimated that one in 200 people suffer whiplash each year.