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Development and validation of wheel and tire model in LS-DYNA for vehicle crashworthiness analysis
2000 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In a car crash, both in frontal and rear end, the tire-wheel system form an important loadpath from the object you crash into to the sill. To be assured that the simulation of a complete car crash gives the right information about the deformation of the car a good tire-wheel model is needed. The aim for this work was to develop a way to model the tire and wheel for crash analysis whenever a new wheel or tire is to be introduced at Saab Automobile AB. With new material data and geometry it should be easy to make a model of the tire or wheel, without doing time demanding rig tests and correlations. Rig tests were performed on two different wheels, a light alloy wheel and a steel wheel, with and without tires. An impact body is released from a height and hits the tire/wheel. During the impact the acceleration of the impact body and the pressure change inside the tire was measured. A complete three-dimensional FE model of the two wheels was created and correlated with the results from the rig test. Shell elements were used to model up the geometry and then given known material data. The simulation was performed in LS-DYNA, a dynamic analysis code. The new tire-wheel model was also studied in a complete car model simulation. With a speed of 17.8 m/s the car was run into a deformable barrier with an 40% overlap. The barrier represents another car. In a real crash test the damage to the wheel is modest and often there is no damage at all. In the simulation the damage to the wheel is also very little, which shows that the model behaves like it does in reality.

Place, publisher, year, edition, pages
Keyword [en]
Technology, LS-DYNA, crash analysis, wheel, tire, FE-model
Keyword [sv]
URN: urn:nbn:se:ltu:diva-50568ISRN: LTU-EX--00/095--SELocal ID: 7cd6ccfb-0ce0-418f-800b-8cbc25fa943eOAI: diva2:1023929
Subject / course
Student thesis, at least 30 credits
Educational program
Civil Engineering programmes 1997-2000, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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