Identification of parameters of cohesive elements for modeling of bonded joints of epoxy composites using Araldite 2021 and Spabond 345 adhesives

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F12%3A43916220" target="_blank" >RIV/49777513:23520/12:43916220 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/49777513:23210/12:43916220

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Identification of parameters of cohesive elements for modeling of bonded joints of epoxy composites using Araldite 2021 and Spabond 345 adhesives

Popis výsledku v původním jazyce

In this work, two basic modes I resp. II of the joint failure are desribed as failures under tensile and shear loading, respectively. DCB (Double Cantilever Beam) test results in failure I, ENF (End Notched Flexure) test in failure II. These tests were used for the identification of the critical strain energy release rates which are the parameters of the cohesive crack model. MSC.Marc system includes so-called interface elements for the cohesive zone modeling which can have linear or exponential or linear-exponential behaviour. These elements require knowledge of the Critical Opening Displacement (COD) which relates to the crack head location. The COD value was identified using an optimization algorithm from the comparison of the load-displacement curves of the experiments and their numerical simulations. The exponential beavior of the elements was assumed in the simulations.

Název v anglickém jazyce

Identification of parameters of cohesive elements for modeling of bonded joints of epoxy composites using Araldite 2021 and Spabond 345 adhesives

Popis výsledku anglicky

In this work, two basic modes I resp. II of the joint failure are desribed as failures under tensile and shear loading, respectively. DCB (Double Cantilever Beam) test results in failure I, ENF (End Notched Flexure) test in failure II. These tests were used for the identification of the critical strain energy release rates which are the parameters of the cohesive crack model. MSC.Marc system includes so-called interface elements for the cohesive zone modeling which can have linear or exponential or linear-exponential behaviour. These elements require knowledge of the Critical Opening Displacement (COD) which relates to the crack head location. The COD value was identified using an optimization algorithm from the comparison of the load-displacement curves of the experiments and their numerical simulations. The exponential beavior of the elements was assumed in the simulations.

Druh

O - Ostatní výsledky

CEP obor

JI - Kompositní materiály

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2012

Kód důvěrnosti údajů

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