Usporedba momenta loma kutnog spoja izvedenoga upotrebom različitih ljepila

Hrovatin, Jasna; Zupančič, Anton; Šernek, Milan; Oblak, Leon

doi:10.5552/drind.2013.1248

Cited by 4 publications

(5 citation statements)

References 2 publications

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“…The results of corner window frame double tenon glue joint strength produced from combined poplar-beech veneer LVL, showed that fail- (Table 7). The torque reached in this experiment was 2 to 3 times higher than that was in similar experiment by Hrovatin et al (2013) for corner connection strength glued with different adhesives. In this research authors examined spruce elements 68 x 98mm and the corner joint was implemented by innovative ring type of connection (this ring type of connection was prizewinning in the International fair in Geneva and Nürnberg -patent No.…”

Section: Corner Window Frame Double Tenon Glue Joint Strengthcontrasting

confidence: 51%

“…Резултати тестирања угаоне везе рама прозора израђеног од комбинованог буковог и тополовог LVL-а, показали су да је угаона веза попуштала при просечној сили лома од 7093 N, односно просечном моменту силе од 900 Nm (Табела 7). Ова вредност момента силе је 2 до 3 пута већа у односу на вредности које су добили Hrovatin et al (2013) за угаону везу рама прозора лепљену различитим лепковима. У том истраживању аутори су користили профиле смрче попречног пресека 68 x 98 mm, а угаони спој урађен је помоћу дрвеног прстена (спој који је добио златну медаљу на Међународном сајму иновација у Женеви и на Међународном сајму иновација у Nürnbergu -патент бр.…”

Section: квалитет угаоне везе за рам прозораunclassified

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Some properties of LVL composed of poplar and beech veneer and possibilities of their application for window frames

Zdravković¹,

Lovric²,

Dzincic³

et al. 2017

Glas Suma Fakul

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Извод: Предмет овог рада је испитивање физичких и механичких својстава тополових LVL плоча споља додатно ојачаних буковим фурниром, као и испитивање чврстоће угаоних елемената везе за прозор израђених од овог материјала. Плоче су пресоване сувим врућим поступком у индустријским условима, а као везивно средство коришћен је FF фенол-формалдехидни лепак. Узорци за испитивање чврстоће угаоних спојева спајани су двоструким призматичним чепом и прорезом помоћу PVA-ц лепка класе D4. Статистичка анализа показала је да постоји значајна разлика у влажности и густини плоча по дебљинама док код тврдоће плоча значајност разлике не постоји. Резултати смицајне чврстоће у слоју лепка показали су да су и FF и PVA-ц D4 лепак испунили услове прописане стандардом. Подаци добијени испитивањем елемента везе за прозор показали су да спој двоструки чеп и прорез спојен помоћу PVA-ц лепка тип D4, у потпуности може применити у производњи и експлоатацији прозора појачане носивости.

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Section: Corner Window Frame Double Tenon Glue Joint Strengthcontrasting

confidence: 51%

Section: квалитет угаоне везе за рам прозораunclassified

Some properties of LVL composed of poplar and beech veneer and possibilities of their application for window frames

Zdravković¹,

Lovric²,

Dzincic³

et al. 2017

Glas Suma Fakul

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“…The bending-moment capacity is strongly affected by the length and width of the tenon, while the width has a slight lower influence (Kasal et pairing of open full-width mortise-and-tenon-joint elements on the strength of joints, and this type of joint was found to be the strongest at a tight fit of 0.1 mm. The mortise-and-tenon joint, in combination with PVAc, provided the best strength for all investigated wood species (Vassiliou et al, 2016;Bardak et al, 2017), while PU glue has appropriate strength in comparison with PVAc, and can completely fill and cover the gaps between the elements of a joint (Hrovatin et al, 2013). The suitable construction type of chairs, constructed with defined tenon dimensions, has been determined based on the required load-carrying capacity (Kiliç et al, 2018;Hitka et al, 2018;Ayrilmis et al, 2020).…”

Section: Introduction 1 Uvodmentioning

confidence: 99%

Bending Moment of Mortise-and-Tenon Joints in a Crossed Chair Base

et al. 2023

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This paper investigated the bending moment of chair base joints. The ultimate bending moments (maximum moment), calculated on the base of the measured maximum applied loads (maximum force), were compared for the front leg and rear leg joints of a chair base. The joints had different angles between the stretcher and the leg (joint angle) as well different tenon lengths (30 mm and 32 mm). The results of the tests indicated that for different test specimen configurations but the same tenon-and-mortise geometry, the maximum force of joints with a smaller value of joint angle (front leg joints) was higher than the force values of joints with a larger angle (rear leg joints) for all tenon lengths. However, the results showed less difference among the calculated bending moments of the analysed sets of joints. A significant difference was not revealed between the bending moments of joints with a smaller value of joint angle and the bending moments of joints with a larger angle for all tenon lengths. A significant difference between the bending moments for the tenon length of 30 mm and tenon length of 32 mm was determined for rear leg joints but not for front leg joints. The presented approach of joint strength analysis through the testing of specimens with different shapes and dimensions are applicable to research and practice.

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“…In an investigation of effect of wood species and adhesive type on the stiffness of rail to leg mortise and tenon furniture joints, the type of glue was not important for spruce joints, whereas for beech, the stiffness of joints glued with PVAc was significantly higher than with PU adhesive (Záborský et al 2017). In comparison with PVAc, PU glue has appropriate strength, and, as they slightly expand during the hardening phase, can completely fill and cover the gaps between elements of joint (Hrovatin et al 2013). Dowel joints glued with PU adhesive showed improved mechanical properties in humid environments (Máchová et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Strength and stiffness analyses of standard and double mortise and tenon joints

Hajdarevic

Obućina

Mešić

et al. 2020

BioRes

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This paper investigated the effect of the tenon length on the strength and stiffness of the standard mortise and tenon joints, as well of the double mortise and tenon joints, that were bonded by poly(vinyl acetate) (PVAc) and polyurethane (PU) glues. The strength was analyzed by measuring applied load and by calculating ultimate bending moment and bending moment at the proportional limit. Stiffness was evaluated by measuring displacement and by calculating the ratio of applied force and displacement along the force line. The results were compared with the data obtained by the simplified static expressions and numerical calculation of the orthotropic linear-elastic model. The results indicated that increasing tenon length increased the maximal moment and proportional moment of the both investigated joints types. The analytically calculated moments were increased more than the experimental values for both joint types, and they had generally lower values than the proportional moments for the standard tenon joints, as opposed to the double tenon joints. The Von Mises stress distribution showed characteristic zones of the maximum and increased stress values. These likewise were monitored in analytical calculations. The procedures could be successfully used to achieve approximate data of properties of loaded joints.

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Usporedba momenta loma kutnog spoja izvedenoga upotrebom različitih ljepila

Abstract: • The main goal of this research is to determine the most

Cited by 4 publications

References 2 publications

Some properties of LVL composed of poplar and beech veneer and possibilities of their application for window frames

Some properties of LVL composed of poplar and beech veneer and possibilities of their application for window frames

Bending Moment of Mortise-and-Tenon Joints in a Crossed Chair Base

Strength and stiffness analyses of standard and double mortise and tenon joints

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