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Title: Studies on Structural Configurations for Vehicular Crash Energy Absorption
Keywords: Crashworthiness, road accidents, safety studies, tube inversion
Engineering and Technology,Engineering,Engineering Mechanical
University: Birla Institute of Technology and Science
Completed Date: 2018
Abstract: Human safety in transportation is given a paramount priority across the globe in the design, development and qualification of passenger cars and other road vehicles. Different research and surveys reveal that on an average about 1.3 million people die in road accidents every year and frontal collision is observed to be the major cause. Extensive research in vehicle crashworthiness, occupant protection, safety and bio-mechanics of occupants in road vehicles attributed the severe fatalities in frontal collisions to the high intensity decelerations that causes severe damage to internal organs of the human occupants. Therefore, the transportation industry had come with injury criteria for various vital parts of the human body. These criteria recommend the limiting values of deformations, velocities, decelerations (accelerations) and forces a human body can tolerate. These standards triggered the need for controlled energy absorption to attenuate the intensity of decelerations in frontal collisions. Widely accepted and proven method of energy absorption is through irreversible plastic deformation of materials /structures. The crash energy is absorbed axially by the energy absorbing (EA) structures such as crush cans or crush tubes within the frontal portion of the vehicle known as crumple zones. Although considerable research is carried out so far in developing EA structures, major limitation in most structures is that they exhibit high initial peak crush forces and low stroke efficiencies. Stroke efficiency (SE) is the ratio between the deformed and the original lengths of an EA structure. newlineIn phase-1 of current research, methodologies are developed for numerical simulation of crash energy absorption behaviour of EA structures based on non-linear explicit finite element analysis (FEA). The simulation methods are established and finalised after comparison with experimental results available in literature for crash behaviour of certain standard EA structures. newlineThe FEA procedure thus established is extended to analyse and
Pagination: 217
Appears in Departments:Mechanical Engineering

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