Car motor cycle impacts have of late been of interest. This is primarily because of increasing incidence of these types of accidents in recent years. The car - motor-cycle (MC) crash test standard specifies the need to model these crashes. These simulations are aimed at understanding the car motor cycle crashes during the motor-cycle design stage. The project aims at developing finite element models of the car and the motor cycle and simulate the car-motor-cycle crashes in different orientations. It has been motivated by a desire to model necessary details of cars and motor cycles so as to be able to model new motorcycles with necessary details with minimal effort. This work has been carried out in collaboration with the Japan Automobile Research Institute (JARI).

In the past car motor cycle crashes were conducted at JARI using the Toyota Corolla, 1989 car and the Kawasaki GPZ, 1988 motor cycle. Simulations using MADYMO were performed by JARI to replicate the crash conditions. In order to get better simulation results and o have a better validation of the models, it was felt that hybrid (rigid-body – FEM) models or FEM models would be needed. The ISO13232 specifies various orientations for car-MC crashes which need to be simulated for establishing the efficacy of safety devices on the MC. In this work we have realistic and extensive simulations of these crashes and have made models of new MCs at the design stage and have evaluated their crashworthiness in car-MC accidents.

The figures below show some snapshots of the some ISO 13232 compatible experiments carried out jointly with Jari for developing these simulations

The developed MC model is shown below.

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Motorcycle computer simulation model.  (S Mukherjee et al., 2000)

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The car model is shown here.

FE Model of OV Used for frontal Impact Simulation.  (A Chawla et al.,2005)

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Comparison of the kinematics of the experiment and simulation   (A Chawla et al.,2007)

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1. Modeling of car-motor cycle crashes

1. NAKATANI T, SAKURAI M, CHAWLA A and MUKHERJEE S, A methodology for Motorcycle-vehicle Crash Simulation-Development of Motorcycle Computer Simulation Model, Jari research Journal, Vol.23, No.10, p28-35, 2001

2. Chawla A, Mukherjee, S, Mohan D, Singh M, Sakurai M and Nakatani T, “A Methodology for car – motorcycle crash simulation, Jari Research Journal, 2001, Vol 23, No 2, pp 18-21.
   
   

3. Chawla, S. Mukherjee, D. Mohan, Dipan Bose, M. Sakurai, T. Nakatani, FE simulations of car - motor cycle frontal crashes - validations and observations, Proceedings of ESV 2003 held in Nagoya Japan, in May 2003.
   
   

4. A Chawla, S Mukherjee, and D Mohan, Impact biomechanics in two wheeled and three wheeled vehicles, Proceedings Symposium on Large Deformations, Sept 1, 2002, New Delhi.
   
   

5. S Mukherjee, A Chawla et al, Modeling of head impact on laminated glass wind shields, Proceedings of IRCOBI 2000, Montpellier, France, September 2000.
   
   

6. S Mukherjee, A Chawla, D Mohan, M Singh, T Nakatani and M Sakurai, Modeling Car – MC Sideimpact Simulations, Proceedings of IRCOBI 2001, Isle of Man, UK, October, 2001
   
   

7. T Nakatani, M Sakurai, Chawla A and Mukherjee S, A methodology for motorcycle-vehicle crash simulation - development of motorcycle computer simulation model, to appear in JSAE, October 23-25, 2001
   
   

8. T Nakatani, M Sakurai, Chawla A and Mukherjee S , Motorcycle-vehicle crash simulation construction of motorcycle model, to appear in JASME, September 21, 2001
    

9. Rogers N, Zellner J, Chawla A and Nakatani T, Methodologies for motorcycle injury prediction by means of computer simulations, Proceedings of IRCOBI 2004, Graz, Austria, 2004.

10. Mukherjee S, Chawla A, and Iyer SK, Positioning of motorcycle dummies in crash simulations, Intenational Journal of Crashworthiness, Vol  11 No 4, pp337-343, 2006.

11. Chawla A, Mukherjee S, Mohan D, Bose D, Rawat P, Nakatani T and Sakurai M, FE Simulations of motorcycle car frontal crashes, validations and observations, International Journal of Crashworthiness, 2005, Vol 10, No 4, pp 319-326.

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