I am pleased to share with you the presentation "Roll-Over Crash-Test Simulation" held by Marco BARBI from IVECO at the EuroMed SIMULIA Regional User Meeting 2022 on September 14, 2022.
Marco Barbi is a Senior Virtual Structural Analyst with more than 25 years of experience in the simulation field.
Marco received his master's degree in Aerospace Engineering at the Politecnico of Turin in 1998. He then started working for CapGemini as a Junior Virtual Analyst focusing on structural items.
Remaining in the virtual simulation field, Marco joined Tesco TS in 2000 as a Senior Virtual Analyst focusing on Crashworthiness. As part of his position there, he has collaborated with significant automotive, aeronautic railway, and other industrial companies to design safety structures according to the corresponding regulations and standards.
In 2011 Marco joined IVECO S.p.A, where he continued his career as a Virtual Structural Analyst gaining more experience in the Passive Safety of Commercial Vehicles, mainly in Homologation Regulations as ECER66 or ECER29.
Marco is currently responsible for the Passive Safety Simulation for the IVECO Medium & Heavy range.
Abstract:
In the commercial vehicle business, the roll-over resistance has relevant importance for the evaluation of the passenger's security of a bus or minibus, in fact, it exists a UNECE Regulation, ECER66, related to this event which each minibus or bus to be sold must be compliant with.
A roll-over test, normally performed in a prototypal phase, is very expensive due to vehicle cost and the test itself. For this reason, the virtual simulation plays the main role to design the vehicle in a safe way. Moreover, the ECER66 Regulation allows proving the performance of the vehicle using only the virtual simulation avoiding the experimental test.
For this reason, an approach based on a FEM explicit simulation is useful, where the complete roll-over phenomenon can be simulated by taking into account inertia, velocity, acceleration, friction effects, non-linear materials, etc.; obviously, it must be well correlated to be predictive for future development and homologation.
To define this methodology an experimental roll-over test on a Daily VAN was performed and the software Abaqus explicit has been chosen to reproduce it. The roll-over test, as prescribed in the ECER66 Regulation, consists of a free fall from an inclined platform having its hinge 800mm above the ground.
The simulation starts at the instant of first contact with the ground when the vehicle has the kinematic constraints as calculated from a free rotation around the platform hinge due to gravitational field.
Particular attention has been paid to the definition of the materials and mainly to the windshield glass: its rupture path strongly influences the overall vehicle behavior.
The correlation results have shown a very good comparison between virtual and physical data in terms of deformation and intrusion in the function of time. These results guarantee reaching a remarkable confidence level enough to homologate new vehicles.
Please see here for the PDF slides and a live recording of Marco's presentation:
RUM2022 RUM2022-EuroMed Abaqus
