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Designs 2018, 2(4), 43; https://doi.org/10.3390/designs2040043

Prediction of Vehicle Crashworthiness Parameters Using Piecewise Lumped Parameters and Finite Element Models

1
Department of Engineering Sciences, University of Agder, Jon Lilletuns Vei 9, 4879 Grimstad, Norway
2
Department of Mechanical and Energy Engineering, College of Science and Technology, University of Rwanda, Avenue de l’Armée, P.O.Box 3900 Kigali, Rwanda
3
Department of Structural Engineering, Norwegian University of Science and Technology, Richard Birkelands Vei 1A, 7491 Trondheim, Norway
*
Author to whom correspondence should be addressed.
Received: 31 August 2018 / Revised: 22 October 2018 / Accepted: 23 October 2018 / Published: 30 October 2018
(This article belongs to the Special Issue Road Vehicle Safety: Design and Assessment)
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Abstract

Estimating the vehicle crashworthiness experimentally is expensive and time-consuming. For these reasons, different modelling approaches are utilised to predict the vehicle behaviour and reduce the need for full-scale crash testing. The earlier numerical methods used for vehicle crashworthiness analysis were based on the use of lumped parameters models (LPM), a combination of masses and nonlinear springs interconnected in various configurations. Nowadays, the explicit nonlinear finite element analysis (FEA) is probably the most widely recognised modelling technique. Although informative, finite element models (FEM) of vehicle crash are expensive both in terms of man-hours put into assembling the model and related computational costs. A simpler analytical tool for preliminary analysis of vehicle crashworthiness could greatly assist the modelling and save time. In this paper, the authors investigate whether a simple piecewise LPM can serve as such a tool. The model is first calibrated at an impact velocity of 56 km/h. After the calibration, the LPM is applied to a range of velocities (40, 48, 64 and 72 km/h) and the crashworthiness parameters such as the acceleration severity index (ASI) and the maximum dynamic crush are calculated. The predictions for crashworthiness parameters from the LPM are then compared with the same predictions from the FEA. View Full-Text
Keywords: piecewise lumped parameters; finite element analysis; dynamic crush; acceleration severity index piecewise lumped parameters; finite element analysis; dynamic crush; acceleration severity index
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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B. Munyazikwiye, B.; Vysochinskiy, D.; Khadyko, M.; G. Robbersmyr, K. Prediction of Vehicle Crashworthiness Parameters Using Piecewise Lumped Parameters and Finite Element Models. Designs 2018, 2, 43.

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