Drvna Industrija最新文献_第5页

Čimbenici koji utječu na proces savijanja cjelovitog drva Čimbenici koji utječu na proces savijanja cjelovitog drva

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0020

Mislav Mikšik, Stjepan Pervan, Miljenko Klarić, Anita Čavlović, Nikola Španić, Silvana Prekrat

引用次数: 1

Bending Moment of Mortise-and-Tenon Joints in a Crossed Chair Base 交叉椅座榫卯节点的弯矩

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0004

{"title":"Bending Moment of Mortise-and-Tenon Joints in a Crossed Chair Base","authors":"","doi":"10.5552/drvind.2023.0004","DOIUrl":"https://doi.org/10.5552/drvind.2023.0004","url":null,"abstract":"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.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45822053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Boron Compounds-Added Kraft Pulping from Scots Pine 硼化合物-添加苏格兰松硫酸盐纸浆

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0014

Suleyman Kustas, S. K. Gülsoy

引用次数: 1

Strukturne i projektirane vrijednosti lameliranih greda i greda od cjelovitog drva Dipteryx panamensis i Hieronyma alchorneoides s brzorastućih plantaža 具有快速种植园的人参和山毛细枝和细枝的结构和设计价值

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0007

Róger Moya, Carolina Tenorio, Angel Navarro-Mora, Freddy Munoz

{"title":"Strukturne i projektirane vrijednosti lameliranih greda i greda od cjelovitog drva Dipteryx panamensis i Hieronyma alchorneoides s brzorastućih plantaža","authors":"Róger Moya, Carolina Tenorio, Angel Navarro-Mora, Freddy Munoz","doi":"10.5552/drvind.2023.0007","DOIUrl":"https://doi.org/10.5552/drvind.2023.0007","url":null,"abstract":"Dipteryx panamensis and Hieronyma alchorneoides are two species of high specific gravity used in reforestation programs in Costa Rica, but they lack products with structural value for commercialization. In order to introduce the wood of these two species in the market, the objective was established to study the behavior of solid timber beams and glued laminated timber beams of two cross sections (2 cm × 10 cm and 2 cm × 15 cm) and establish the design values in bending test. The results showed that the bending design values (fb) ranged from 2 to 26 MPa in glued laminated timber beams, while in solid timber beams, fb ranged from 6 to 15 MPa. In the shear design values (fv), the variation was from 0.29 to 0.67 MPa in glue laminated timber beams and from 1.80 to 2.58 MPa in solid timber beams. It was also found that the D. panamensis beams showed higher values than H. alchornoides beams. Finally, it was established that glued laminated timber beams showed better performance in bending parameters and higher design values, resulting in wider span values, than solid timber beams when used in floor and roof construction.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45076329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Additive Technologies and Their Applications in Furniture Design and Manufacturing 增材技术及其在家具设计制造中的应用

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0012

Lana Jarža, Anka Ozana Čavlović, S. Pervan, Nikola Španić, Miljenko Klarić, S. Prekrat

{"title":"Additive Technologies and Their Applications in Furniture Design and Manufacturing","authors":"Lana Jarža, Anka Ozana Čavlović, S. Pervan, Nikola Španić, Miljenko Klarić, S. Prekrat","doi":"10.5552/drvind.2023.0012","DOIUrl":"https://doi.org/10.5552/drvind.2023.0012","url":null,"abstract":"This paper deals with an overview of additive manufacturing and its segment - 3D printing, which is today rapidly and widely used (Agashe et al., 2020) for personal and high-capacity production. The paper discusses the possible positive factors such as small and personalized production series, cheaper design and production process, complex geometry, bionic structures (whose surfaces are complicated to make, and are copy of biological organisms) and negative factors such as lack of educated specialists and trainings. Those facts are affecting the implementation of these technologies in different segments of the design, product development and furniture production. The impacts of new technologies on the design and production of rapid prototypes and finished products in furniture industry are analyzed. The positive results of using additive manufacturing indicate that, in spite of minor obstacles and problems with connecting different production processes, additive production will have a significant place in the future of furniture design and production. The most important advantages of 3D printing is fast prototyping, one piece production, free form designing and the use of bio-based materials and their possibility of recycling.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43557565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Iskorištavanje borovine (Pinus sylvestris L.) s greškama za proizvodnju kompozitnog drva 利用樟子松

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0048

Daniel Koynov, Miglena Valyova, Emiliyan Parzhov, Lee Seng Hua

引用次数: 3

Upotreba izoliranog monomera lignina iz crnog luga dobivenoga od praznih grozdova palmina ploda kao prebiotika 使用从空棕榈树中获得的黑空气中分离的木材单体作为益生元

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0015

S. Hidayati, Subeki Subeki, M. M. Harahap, S. Hadi

{"title":"Upotreba izoliranog monomera lignina iz crnog luga dobivenoga od praznih grozdova palmina ploda kao prebiotika","authors":"S. Hidayati, Subeki Subeki, M. M. Harahap, S. Hadi","doi":"10.5552/drvind.2023.0015","DOIUrl":"https://doi.org/10.5552/drvind.2023.0015","url":null,"abstract":"Waste is generated in the form of black liquor during pulp processing. Furthermore, lignin, the main ingredient of black liquor, contains a phenylpropanoid compound with prebiotic and antimicrobial activity. Also, it is a component of lignocellulose that has prebiotic and antimicrobial activity effects due to its indigestible nature and it comprises phenylpropanoid components. Therefore, this study examines and identifies the lignin purification and test results of its prebiotic activity. The technique used to identify lignin fraction is called Thin Layer Chromatography (TLC) and Gas Chromatography-Mass Spectrometry (GC-MS) plates. Prebiotic activity tests were performed using the calculation of total bacteria on the growth of Lactobacillus casei. The results showed that the purification process using CHCl3, 3 % MeOH:CHCl3, 20 % MeOH:CHCl3, and MeOH yielded 10.68 %, 6.34 %, 11.38 % 44.85 %, respectively. The 3 % MeOH:CHCl3 fraction contained benzaldehyde, 4- hydroxy-3,5- dimethoxy, 1-methylbutyl hexadecanoate, oleic acid, and di-2-ethylhexyl phthalate. The 3 % MeOH:CHCl3 fractionate with a concentration of 15 % also showed a prebiotic activity for L. casei at 6.1 x 102 colonies/mL.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47506734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Shear Force Capacities of H-Type Furniture Joints Constructed of Various Heat-Treated Wood Species 不同热处理木材H型家具节点的抗剪性能

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0010

M. Acar, E. Balikci, T. Kuşkun, Ali Kasal, Y. Z. Erdil

{"title":"Shear Force Capacities of H-Type Furniture Joints Constructed of Various Heat-Treated Wood Species","authors":"M. Acar, E. Balikci, T. Kuşkun, Ali Kasal, Y. Z. Erdil","doi":"10.5552/drvind.2023.0010","DOIUrl":"https://doi.org/10.5552/drvind.2023.0010","url":null,"abstract":"The aim of this study was to investigate the effect of wood species, heat treatment, adhesive type and joint technique on shear force capacity of H-type furniture joints. For this purpose, an experimental design that consisted of 3 wood species, 2 treatment processes (untreated, heat-treated), 2 adhesive types (polyurethane (PUR), polyvinyl acetate (PVAc)) and 2 joint techniques (dowel, mortise-tenon (MT)) and 5 replications for each group were prepared, and accordingly, a total of 120 specimens were tested under static shear loads. Siberian pine (Pinus sibirica), Iroko (Chlorophora excelsa), and common ash (Fraxinus excelsior), which are commonly used in furniture constructions, were used as wood species. In general, iroko showed the highest shear force capacity between the wood species. The specimens constructed of heat-treated wood species showed lower shear force capacity by approximately 15 % in comparison to the same untreated specimens. MT joints showed better performance than dowel joints higher by approximately 21 %. PVAc adhesive gave higher values than PU adhesive by around 5 %. According to the results of four-way interactions, highest shear force capacities of H-type joints were obtained from “Common ash-PVAc-MT” combination in groups of untreated specimens and from “Iroko-PU-MT” combination in groups of heat-treated specimens.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42155760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Medium Density Fiberboards (MDF) Recycling Methods on Fiber Dimensions and Some Reconstructed Board Properties 中密度纤维板(MDF)回收方法对纤维尺寸和某些改造板性能的影响

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0037

Çağrı Olgun, S. Ates, Emre Uzer

引用次数: 1

Prediction of Optimum Expanded Polystyrene Densities for Best Thermal Insulation Performances of Polystyrene Composite Particleboards by Using Artificial Neural Network 用人工神经网络预测聚苯乙烯复合刨花板最佳隔热性能的最佳发泡密度

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2022-11-17 DOI: 10.5552/drvind.2022.2119

H. Ozturk, Aydin Demir, Cenk Demirkir

{"title":"Prediction of Optimum Expanded Polystyrene Densities for Best Thermal Insulation Performances of Polystyrene Composite Particleboards by Using Artificial Neural Network","authors":"H. Ozturk, Aydin Demir, Cenk Demirkir","doi":"10.5552/drvind.2022.2119","DOIUrl":"https://doi.org/10.5552/drvind.2022.2119","url":null,"abstract":"The objective of this study is to predict the optimum expanded polystyrene (EPS) densities for the best insulation properties of the particleboards manufactured with waste EPS instead of formaldehyde-based adhesives used in particleboard production with artificial neural network (ANN). For this purpose, the waste EPS particles of five different densities were used in the production of composite particleboards. The experimental dana used in the study were obtained from the previous study. Half of the beech, poplar, alder, pine and spruce chips were dried in a drying oven and the other half were naturally conditioned at room temperature, and then 18 mm thick three-layer composite particleboards were produced. The thermal conductivity of panels was determined according to ASTM C 518. The prediction model with the best performance and acceptable deviations was determined by using statistical and graphical comparisons between the experimental data and the prediction values obtained as a result of ANN analysis. Then, using this prediction model, the thermal conductivity coefficient values were estimated for the intermediate EPS densities that were not experimentally tested. According to the analysis findings, the thermal insulation performance for both beech and spruce polystyrene composite particleboards (PCP) panels increased with using of waste EPS foams with a density of 30 kg/m3. The lowest thermal conductivity values were obtained from the EPS waste foams with the density of 18, 13 and 22 kg/m3 for the PCP panels produced with poplar, alder and pine in the natural drying, respectively. In the technical drying, these values were found to be 15, 14 and 11-13 kg/m3, respectively. Technical drying showed much better thermal performance than natural drying while poplar indicated the best performance among the wood species.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42273546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0