Optimization Of Car Front Structure For Offset Crash

Passenger cars are a major mode of transport in the developed as well as in the developing countries.Car accidents are happening every day and road traffic injuries caused an estimated 1.25 million deaths worldwide each year,and another 20 to 50 million people sustain nonfatal injuries as a result of road traffic collisions.Car passive safety plays an important role in reducing the causality and saving to mitigate accident damage and vehicle crash analysis is a wildly used method to perform the study.Offset crash simulation is appropriate with the primary objective of securing cabin space and thereby reducing passenger deaths as well as on the vehicle front structures performance optimization.In this study the optimization of the car front component was done in offset crash simulation when the car is aligned so that the car strikes the barrier with 40 % overlap on the left side of the car and the car is traveling with a speed of 64 km/h longitudinally forward into a fixed deformable barrier.Since crash analysis has geometry,material and contact non-linearity,a nonlinear finite element analysis was done using LS-DYNA software explicit method solving techniques.To reduce the deformation and intrusion of the cabin components and to increase the energy absorption of the crash boxes and longitudinal beams material and thickness optimization was used.The crash simulation result such as peak acceleration and intrusion distance was evaluated according to Insurance Institute for Highway Safety rating guidelines.The initial simulation result shows that the occupant compartment intrusion is too large during crash this is due to the selected electric car cabin components do not have enough strength.The optimized design with the best crashworthiness intrusion results were chosen for comparison with the original model.In this study,the occupant safety intrusion rating changed from ?poor? to ?good? based on the IIHS rating and hug energy absorption improvement was also observed in the crash boxes and longitudinal beams after optimization.