Experimental Verification of ski model for finite element analysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46709002%3A_____%2F18%3AN0000032" target="_blank" >RIV/46709002:_____/18:N0000032 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental Verification of ski model for finite element analysis

Popis výsledku v původním jazyce

The topic of this work is FE analysis as a first step to understanding of mechanical performance of a ski. At the very beginning a real part scanning has to be done because only hand drawings of the design is available. Creating of a CAD model by reverse engineering is obvious following step to prepare input CAD data for later simulation. The carbon fiber composite ski has sandwich structure with a wooden core. Material testing is an inherent part of any analysis so all represented materials are tested according to testing standards with respect to the anisotropy. In this sense there are three types of used materials – an isotropic, an orthotropic and a transversally isotropic material. Two different types of extensometers (mechanical and optical) must be used as material like wood needs special treatment. The FE model of a ski middle part is created in software Siemens NX using Laminate Composites module (NX LC). The behavior of the FE model is compared with experiment based on deflection in three point bending test. If the resultant deflections show deviation optimizing modifications are done to fit the model more precisely. Deviation of 3 % is reached for this model without any special interventions which means good experimental results. Flexural performance as a predominant loading of the ski is simulated in FEA to get the stress distribution in the ski and in each layer of sandwich structure. In this phase of analysis the exact values of stress are not so important as the way of stress distribution which the work is focused on.

Název v anglickém jazyce

Experimental Verification of ski model for finite element analysis

Popis výsledku anglicky

The topic of this work is FE analysis as a first step to understanding of mechanical performance of a ski. At the very beginning a real part scanning has to be done because only hand drawings of the design is available. Creating of a CAD model by reverse engineering is obvious following step to prepare input CAD data for later simulation. The carbon fiber composite ski has sandwich structure with a wooden core. Material testing is an inherent part of any analysis so all represented materials are tested according to testing standards with respect to the anisotropy. In this sense there are three types of used materials – an isotropic, an orthotropic and a transversally isotropic material. Two different types of extensometers (mechanical and optical) must be used as material like wood needs special treatment. The FE model of a ski middle part is created in software Siemens NX using Laminate Composites module (NX LC). The behavior of the FE model is compared with experiment based on deflection in three point bending test. If the resultant deflections show deviation optimizing modifications are done to fit the model more precisely. Deviation of 3 % is reached for this model without any special interventions which means good experimental results. Flexural performance as a predominant loading of the ski is simulated in FEA to get the stress distribution in the ski and in each layer of sandwich structure. In this phase of analysis the exact values of stress are not so important as the way of stress distribution which the work is focused on.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

<a href="/cs/project/LO1213" target="_blank" >LO1213: Excelentní Strojírenský Výzkum</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

Experimental stress analysis

ISBN

978-80-270-4061-2

ISSN

—

e-ISSN

—

Počet stran výsledku

7

Strana od-do

450-456

Název nakladatele

—

Místo vydání

Liberec

Místo konání akce

Harrachov, Czech Republic

Datum konání akce

5. 6. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—