Theoretical And Experimental Study Of The Strenght Of Post-Accident Coaches Structures

Alcalá Fazio, Enrique and Rincón Dávila, David and Furones Crespo, Arturo and Martín López, Ángel Luis (2016). Theoretical And Experimental Study Of The Strenght Of Post-Accident Coaches Structures. In: "FISITA 2016 World Automotive Congress", 26-30 september 2016, Busan, Korea. pp. 1-8.

Description

Title: Theoretical And Experimental Study Of The Strenght Of Post-Accident Coaches Structures
Author/s:
  • Alcalá Fazio, Enrique
  • Rincón Dávila, David
  • Furones Crespo, Arturo
  • Martín López, Ángel Luis
Item Type: Presentation at Congress or Conference (Article)
Event Title: FISITA 2016 World Automotive Congress
Event Dates: 26-30 september 2016
Event Location: Busan, Korea
Title of Book: Proceedings of FISITA 2016 World Automotive Congress
Date: 2016
Subjects:
Freetext Keywords: collision repair, coaches structures, energy absorption, bending test, finite elements method
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Mecánica
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Vehicles repair after an accident and the quality assurance of the repair is a major safety issue. If the vehicle type category is M3, collective road transport vehicles, there is an additional concern due to their high number of occupants, the responsibility of third parties transport and the severity of some type of collisions such as rollovers. The objective of this work is to quantify the loss of energy absorption capabilities of the structural steel profiles of rectangular hollow section used in the construction of these vehicles and model this behaviour with a FEM software. In order to model the behaviour of the structural profiles after repair with a FEM model, there is a need of quantify the loss of energy absorption in real samples. The deformation energy has been measured by means of bending tests and calculating the bending moment vs bending angle curve. The load has been applied to reach 5, 10 and 20 permanent bending angles, representing those rollover structural deformations found on coach collisions of different severities. All test specimens have been straightened and bended up to 20 degrees some in the same bending direction as initial bend test and some in the opposite direction. Then, computer simulations are made until the behaviour found in the tests is modelled with the FEM model. The results show a significant loss of strength of the profiles and the consequent loss of deformation energy. It has been developed a method to achieve the same results with a FEM model. The greatest limitations of this study are, on one hand, the number of tests that can be carried out, because it is mandatory the test samples are made from the same cast steel in order to eliminate the effects from variations in material properties. On the other hand, the origin of the loss of mechanical properties is not clear at this point; it could be by geometrical or material property changes. In this paper, the loss of energy absorption after repairing has been quantified. Furthermore, it is presented the results of modeling this change of behavior with a FEM model. The values of energy absorption in the test samples demonstrate how it should be defined requirements for repaired buses and coaches after their repair of structural damages in collisions.

More information

Item ID: 46689
DC Identifier: http://oa.upm.es/46689/
OAI Identifier: oai:oa.upm.es:46689
Official URL: http://www.fisita2016.com/
Deposited by: Memoria Investigacion
Deposited on: 20 Jun 2017 10:17
Last Modified: 28 Jun 2017 09:18
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