Wood-Adhesive Bond Loaded in Mode II: Experimental and Numerical Analysis Using Elasto-Plastic and Fracture Mechanics Models

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F21%3A43919080" target="_blank" >RIV/62156489:43410/21:43919080 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1515/hf-2020-0141" target="_blank" >https://doi.org/10.1515/hf-2020-0141</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1515/hf-2020-0141" target="_blank" >10.1515/hf-2020-0141</a>

Result language

angličtina

Original language name

Wood-Adhesive Bond Loaded in Mode II: Experimental and Numerical Analysis Using Elasto-Plastic and Fracture Mechanics Models

Original language description

The goal of the study was to analyze fracture properties of adhesive bond using a three-point end-notched flexure test and the compliance-based beam method. Critical strain energy release rates (GIIc) and cohesive laws were obtained for adhesive bonds made of European beech (Fagus sylvatica L.) and adhesives such as EPI, MUF, PRF and PUR. The experiments were assisted with FE analyses employing three different material models of wood: elastic (Elas), symmetric elasto-plastic (EP) and elasto-plastic with different compressive and tensile yield stresses parallel to fiber (EP+). The highest mean GIIc was achieved for PUR (5.40 NmmMINUS SIGN 1) and then decreased as follows: 2.33, 1.80, 1.59 NmmMINUS SIGN 1 for MUF, EPI, and PRF, respectively. The failure of bondline was brittle and occurred at bondline for EPI, MUF and PRF, and ductile and commonly occurring in wood for PUR adhesive. The FE simulations employing cohesive models agreed well with the experimental findings for all adhesives. FE model with Elas material was found accurate enough for EPI, MUF and PRF adhesives. For PUR adhesive, the model EP+ was found to be the most accurate in prediction of maximal force. The impact of friction between lamellas may be up to 4.2% when varying friction coefficient from 0 to 1. The impact of the grain angle distortion (α) with respect to longitudinal specimen axis showed its high influence on resulting stiffness and maximal force. It was found that three-point end-notched test is suitable for EPI, MUF, and PRF, while it is less appropriate for a bond with PUR adhesive due to notable plastic behavior.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20302 - Applied mechanics

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Holzforschung

ISSN

0018-3830

e-ISSN

—

Volume of the periodical

75

Issue of the periodical within the volume

7

Country of publishing house

DE - GERMANY

Number of pages

13

Pages from-to

655-667

UT code for WoS article

000672580600007

EID of the result in the Scopus database

2-s2.0-85098975703