TY - JOUR AU - BAŞ, Seda AU - Dénes, Levente AU - Csiha, Csilla TI - Mechanical Properties of Furniture Joints Using Loose Tenons and Connectors JF - FORESTS J2 - FORESTS VL - 15 PY - 2024 IS - 2 PG - 14 SN - 1999-4907 DO - 10.3390/f15020343 UR - https://m2.mtmt.hu/api/publication/34728788 ID - 34728788 AB - The investigation conducted in this study focused on assessing the withdrawal resistance of T-joints and the bending moment capacity in the tension and compression of corner joints. For samples, preparation glued-in loose tenons (Domino dowels) and dismountable connectors were used as connecting elements. The joints were made of European beech wood and a D3-grade PVAc adhesive was utilized for bonding. The effect of the joint type, the shoulders’ bonding, and the load application direction were investigated. The test results revealed that the withdrawal resistance of Domino dowel joints exhibited twice the strength compared to Domino connectors. Moreover, the presence of a bonded area on the shoulders did not significantly impact the strength of the joints. In the case of corner joints, the bending moment capacity in compression was notably influenced by the bond line on the shoulders, although such an effect was not significant in tension. Domino dowel joints provided a robust and reliable permanent connection between wooden elements, surpassing Domino connectors; however, in both cases, the strength values exceeded those of conventional dowels and cam lock connector joints. LA - English DB - MTMT ER - TY - THES AU - Suriné Lengyel, Veronika TI - DIGITÁLIS ÁTÁLLÁS LEHETŐSÉGEI A MAGYAR FAIPARI VÁLLALATOKNÁL, KÜLÖNÖS TEKINTETTEL A GYÁRTÁSOPTIMALIZÁCIÓRA PY - 2024 SP - 102 DO - 10.13147/SOE.2024.014 UR - https://m2.mtmt.hu/api/publication/34630435 ID - 34630435 LA - Hungarian DB - MTMT ER - TY - THES AU - Novotni, Adrienn TI - A HETEDIK ÉS A NYOLCADIK KERETPROGRAMBAN MEGVALÓSULT FAIPARI PROJEKTEK STRUKTÚRÁJÁNAK, FINANSZÍROZÁSÁNAK, HÁLÓZATAINAK ÉS EREDMÉNYEINEK ELEMZÉSE PY - 2024 SP - 140 DO - 10.13147/SOE.2024.013 UR - https://m2.mtmt.hu/api/publication/34630390 ID - 34630390 LA - Hungarian DB - MTMT ER - TY - THES AU - Király, Tamás TI - DEVELOPMENT OF A NOVEL FINITE ELEMENT MODEL AND MATERIAL DEGRADATION MODEL FOR SPRUCE TIMBER SPECIMENS PY - 2024 SP - 95 DO - 10.13147/SOE.2024.011 UR - https://m2.mtmt.hu/api/publication/34629953 ID - 34629953 LA - English DB - MTMT ER - TY - JOUR AU - Mucsi, Zsuzsanna AU - Hasan, K M Faridul AU - Horváth, Péter György AU - Bak, Miklós AU - Le, Duong Hung Anh AU - Kóczán, Zsófia AU - Bejó, László AU - Alpár, Tibor László TI - Fabrication and characterization of lignocellulosic coconut and energy reed straw-reinforced methylene diphenyl diisocyanate-bonded sustainable insulation panels JF - CONSTRUCTION AND BUILDING MATERIALS J2 - CONSTR BUILD MATER VL - 414 PY - 2024 PG - 13 SN - 0950-0618 DO - 10.1016/j.conbuildmat.2024.134992 UR - https://m2.mtmt.hu/api/publication/34514117 ID - 34514117 AB - The use of renewable environmental resources and plastics that can be returned to the biological cycle shows a new direction in the application of composite building materials. This study investigated the potential and strengthening effects of developing composite panels from coconut materials (CM) and reed straw (RS) particles in the presence of methylene diphenyl diisocyanate (MDI). Five composite panels with 100:0, 60:40, 50:50, 40:60, and 0:100% proportions were produced. The nominal density was 600 kg/m3 and the dimensions were 400 × 400 × 8 mm3. The panels were produced by hot-pressing for a total of 10 min at a maximum pressure of 7.2 MPa and at 135 degrees, and then slowly cooled at room temperature. The following experiments were performed: mechanical, physical and morphological properties, thermal conductivity, FTIR (Fourier transform infrared spectroscopy), and EDX (Energy disruptive X-ray). The study gave the following results: the thermal conductivity of the coir and reed panels is competitive with the thermal insulation capacity of similar natural-based insulation materials, and is close to the values of other mineral and plastic-based insulation materials. The values of thermal conductivity coefficient ranged from 0.08 to 0.10 W/(mK). Only reeds (MDI_1) boards have better results than coconut materials. Among the mechanical properties, flexural strength and internal bonding strength increased proportionally with the increase in the amount of coconut. The Young's modulus reached its maximum in the case of a 50–50% coir-reed mixture. The best values of the panels are: 6.33 MPa for flexural strength, 1.83 GPa for Young's modulus and 0.36 MPa for internal bonding strength. The morphological recordings confirmed the proper mixing and binding of the lignocellulosic materials in the composite. FTIR tests proved the successful chemical interactions. The findings support the possibility of creating a promising, environmentally friendly building material. LA - English DB - MTMT ER - TY - JOUR AU - Zinad, Omar saber AU - Csiha, Csilla TI - Improving sustainability of mortar by wood-ash and Nano-SiO2 JF - Case Studies in Chemical and Environmental Engineering J2 - Case. Stud. Chem. Environ. Eng. VL - 9 PY - 2024 PG - 5 SN - 2666-0164 DO - 10.1016/j.cscee.2023.100597 UR - https://m2.mtmt.hu/api/publication/34501909 ID - 34501909 AB - Cement production charges the environment with CO2 pollution and exhausts natural stocks of limestone and clay. Cement was partially replaced with Wood Ash (WA), and nano-SiO2 (NS) was added to balance the strength loss. Mortar specimens were prepared by replacing the cement with WA up to 20 %, 30 %, 40 %, and 50 %, using constant-flow mortar. The flexural and compressive strength results indicated that although adding 40 % of WA reduced the mortar's strength, it still remained in an acceptable zone (higher than 20 MPa). The addition of 2.5 % NS recovered the strength loss caused by replacing cement with 40 % WA. LA - English DB - MTMT ER - TY - CHAP AU - Pataki, Bálint AU - Nagy, Kinga AU - Nguyen, Binh Thanh ED - Dang, T.K. ED - Kung, J. ED - Chung, T.M. TI - Comparing Performance of Linear Regression Models Trained on Systematic Forest Measurement Datasets to Predict Diameter at Breast Height PB - Springer Science+Business Media SN - 9789819982950 T3 - Communications in Computer and Information Science, ISSN 1865-0929 ; 1925 CCIS. PY - 2023 SP - 513 EP - 527 PG - 15 DO - 10.1007/978-981-99-8296-7_37 UR - https://m2.mtmt.hu/api/publication/34745599 ID - 34745599 LA - English DB - MTMT ER - TY - CHAP AU - Le, Duong Hung Anh AU - Pásztory, Zoltán ED - Molnár, László ED - Pásztory, Zoltán TI - Thermal resistance values of natural fiber-based insulation panels and the impact of their thickness on the thermal transmittance values of an external wall structure T2 - Az alkalmazott művészet létmódjai és a kreatív ipar kihívásai napjainkban : Faipari Mérnöki és Kreatívipari Kar tudományos kiadványa PB - Soproni Egyetem Kiadó CY - Sopron SN - 9789633344538 PY - 2023 SP - 240 EP - 251 PG - 12 DO - 10.35511/978-963-334-453-8.Anh-Pasztory_Z UR - https://m2.mtmt.hu/api/publication/34552098 ID - 34552098 AB - The purpose of this paper is to experimentally study the thermal resistance values (R-value) of insulation panels made mainly from natural fibers. Another investigation is to study the impact of the panel’s thickness on the values of thermal transmittance (U-value) of a multilayered installation for external wall systems to determine the optimal thickness of insulation panels used for building envelopes. Natural fibrous materials or renewable resources and their reinforcement composites are currently being used in building and construction as a potential solution to significantly reduce thermal load and energy consumption. In this study, the thermal resistance values of several samples made from rice straw, energy reed, and coir fiber are calculated from the thermal conductivity which was measured at room temperature (20 °C) using the mean of heat plate method. The lowest R-value was recorded from the polymeric composites reinforced by coir fiber and rice straw fiber (0.11 to 0.19 m2·K/W). Although these samples showed the least heat insulation capacity, however, they can be used as an additional layer in multi-layered wall structures because of their low thermal conductivity coefficient. Besides, the R-value per mm was also scored to highlight a strong dependence of thermal resistant performance on the thickness of the samples. On the other hand, the simulated data showed that increased thickness resulted in decreased U-value and the optimal thickness can be determined when the thickness is larger than 120 mm according to the standard of low energy house. Overall, the calculated R-values is a valuable parameter to evaluate the thermal resistant effectiveness of a multi-layered installation, which allows us to investigate the effect of additional layers from different insulating materials used in building envelopes. LA - English DB - MTMT ER - TY - CHAP AU - Boros, Eszter ED - Molnár, László ED - Pásztory, Zoltán TI - A fa élettani hatása T2 - Az alkalmazott művészet létmódjai és a kreatív ipar kihívásai napjainkban : Faipari Mérnöki és Kreatívipari Kar tudományos kiadványa PB - Soproni Egyetem Kiadó CY - Sopron SN - 9789633344538 PY - 2023 SP - 123 EP - 129 PG - 7 DO - 10.35511/978-963-334-453-8.Boros_E UR - https://m2.mtmt.hu/api/publication/34535061 ID - 34535061 AB - A folyamatban lévő kutatás célja, hogy feltárja az innováció újabb lehetőségeit a faalapú forma- és téralakításban. A távol-keleti kultúrákban a modern technológia és formaalakítás gyakran a saját ősi tradícióira támaszkodik. Így a kutatómunka során az európai, modern szellemiségre alapozott építészet is vizsgálat tárgyát képezi. Mindezt összekapcsolva a fának, mint élőlénynek, és mint építészeti alapanyagnak az emberre ható fizikai, kémiai, fiziológiai vizsgálatával, feltárva azok összefüggéseit. LA - Hungarian DB - MTMT ER - TY - CHAP AU - Reményi, Andrea ED - Resperger, Richárd TI - Metamarketing: fenntartható innovációk a valós és virtuális lehetőségek imperatív szimbiózisa mentén T2 - FENNTARTHATÓSÁGI ÁTMENET: KIHÍVÁSOK ÉS INNOVATÍV MEGOLDÁSOK - Nemzetközi tudományos konferencia a Magyar Tudomány Ünnepe alkalmából : Programfüzet és előadáskivonatok PB - Soproni Egyetem Kiadó CY - Sopron SN - 9789633344989 PY - 2023 SP - 66 UR - https://m2.mtmt.hu/api/publication/34483921 ID - 34483921 LA - Hungarian DB - MTMT ER -