International Journal of Research and Innovation (IJRI)
International Journal of Research and Innovation (IJRI) 1401-1402
REDUCTION OF IMPACT EFFECT ON CAR BUMPER USING MEMORY SHAPE ALLOY PADS.
M.Arun Kumar, 1, Y Anil Reddy2, Godi Subba Rao3, 1 Research Scholar, Department of Mechanical Engineering, Hyderabad Institute of Technology and Management, Hyderabad, India 2 Assistant professor, Department of Mechanical Engineering, Hyderabad Institute of Technology and Management,Hyderabad, India 3 professor, Department of Mechanical Engineering, Hyderabad Institute of Technology and Management, Hyderabad, India
Abstract Bumper is one of the most important parts in passenger cars for which the material and structure should be considered in order to reduce the impact of collision. Since suitable impact strength is the main expectation for such a structure, the authors survey the variables that directly give impact characteristics and wished for easily achievable modifications resulting from impact modeling on commercial bumpers. Many researchers have studied that accident always occurs in front side. The impressed the authors to study and analyses the component related to frontal crash and therefore, the authors selected bumper. Aim of the project work is reduce the effort of car bumper by introducing honey comb structure instead of regular rubber block as impact block. •Initially data collection and literature survey will be done to understand the problem and rectification methodology. •A parametric model and design will be prepared using reverse engineering process. •Structural analysis will be carryout on regular and with honey comb structured damper pad with rubber and NITINOL material as a damper element. •Impact analysis will be carryout on bumper with honey comb structured damper pad. •Comparison will be done between result of traditional and honey comb structured bumper pad. •Graphs and tables will be prepared for easy understanding and comparison.
*Corresponding Author: M.Arun Kumar, Research Scholar, Department of Mechanical Engineering, Hyderabad Institute of Technology and Management, Hyderabad, India Published: July 04, 2015 Review Type: peer reviewed Volume: I, Issue : IV
Citation: M.Arun Kumar, Research Scholar (2015) REDUCTION OF IMPACT EFFECT ON CAR BUMPER USING MEMORY SHAPE ALLOY PADS.
PROBLEM DESCRIPTION AND METHODOLOGY Car bumper is used for the protection of passengers, generally steel or impact grade plastics are used as bumper material along with rubber pads between chassis and bumper. As per the previous research passenger’s protection can be increased up to 34% by increasing bumper thickness. But the percentage of passenger safety is not satisfactory even after modifications. This is an attempt to increase the passenger’s safety by implementing honey comb structure and (NITINOL) memory shape alloy which is used as damper strings. The following process will be followed to increase passenger’s safety. 1)Parametric model will be created to conduct analysis. 2)Structural analysis will be conducted on normal model to evaluate the results ( for comparison purpose). 3)Analysis will be carried out by changing bumper materials.
4)Honey comb structure pad with rubber and memory shape alloy will be analyzed to determine impact conditions. INTRODUCTION TO BUMPER OF A CAR An automobile's bumper is the front-most or rear-most part, ostensibly designed to allow the car to sustain an impact without damage to the vehicle's safety systems. They are not capable of reducing injury to vehicle occupants in high-speed impacts, but are increasingly being designed to mitigate injury to pedestrians struck by cars. First standards In 1971, the U.S. National Highway Traffic Safety Administration (NHTSA) issued the country's first regulation applicable to passenger car bumpers. Federal Motor Vehicle Safety Standard No. 215 (FMVSS 215), "Exterior Protection," took effect on 1 September 1972 — when most automakers would begin producing their model year 1973 vehicles. The standard prohibited functional damage to specified safety-related components such as headlamps and fuel system components when the vehicle is subjected to barrier crash tests at 5 miles per hour (8 km/h) for front and 2.5 miles per hour (4 km/h) for rear bumper systems. In October 1972, the U.S. Congress enacted the Motor Vehicle Information and Cost Saving Act (MVICS), which required NHTSA to issue a bumper standard that yields the "maximum feasible reduction of cost to the public and to the consumer". Factors considered included the costs and benefits of implementation, the standard's effect on insurance costs and legal fees, savings in consumer time and inconvenience, and health and safety considerations. The 1973 model year passenger cars sold in the U.S. used 130