Industry-oriented assessment of the fatigue life of thin-walled profile weldments used in the construction of bus bodies

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F24%3A43974770" target="_blank" >RIV/49777513:23210/24:43974770 - isvavai.cz</a>

Výsledek na webu

<a href="https://zenodo.org/records/12706394" target="_blank" >https://zenodo.org/records/12706394</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5281/zenodo.12706394" target="_blank" >10.5281/zenodo.12706394</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Industry-oriented assessment of the fatigue life of thin-walled profile weldments used in the construction of bus bodies

Popis výsledku v původním jazyce

The paper presents findings from the intensive cooperation of the university research center with manufacturers of buses, trolleybuses, and electric buses in solving commercial projects, which are aimed, among other things, at solving the strength and fatigue life of their bodywork. The successive steps of the methodology are the creation of the MBS model of the vehicle and the simulation of its driving over an artificial standardised obstacle. The FEM model of the body is loaded with the calculated forces acting in the suspension elements (shock absorbers and air springs) and the stress responses on the critical structural nodes are calculated. Then, the S-N curves of these structural nodes are estimated or, even better, determined experimentally, and the future service stress spectra for the vehicle&apos;s design life are estimated. Using the fatigue damage accumulation hypothesis, the permissible maximum stress amplitude in the design spectrum can be determined and compared with the calculated or measured value. A case study from practice concretely documents the procedure.

Název v anglickém jazyce

Industry-oriented assessment of the fatigue life of thin-walled profile weldments used in the construction of bus bodies

Popis výsledku anglicky

The paper presents findings from the intensive cooperation of the university research center with manufacturers of buses, trolleybuses, and electric buses in solving commercial projects, which are aimed, among other things, at solving the strength and fatigue life of their bodywork. The successive steps of the methodology are the creation of the MBS model of the vehicle and the simulation of its driving over an artificial standardised obstacle. The FEM model of the body is loaded with the calculated forces acting in the suspension elements (shock absorbers and air springs) and the stress responses on the critical structural nodes are calculated. Then, the S-N curves of these structural nodes are estimated or, even better, determined experimentally, and the future service stress spectra for the vehicle&apos;s design life are estimated. Using the fatigue damage accumulation hypothesis, the permissible maximum stress amplitude in the design spectrum can be determined and compared with the calculated or measured value. A case study from practice concretely documents the procedure.

Druh

O - Ostatní výsledky

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů