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Articoli di riviste sul tema "Wood displacement"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 1 febbraio 2022

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1

Kajikawa, Shohei, Takashi Iizuka, and Keisuke Yamaishi. "Displacement Behavior of Wood in Boss Forming Using Open-Die Wood Forging." Key Engineering Materials 504-506 (February 2012): 1261–66. http://dx.doi.org/10.4028/www.scientific.net/kem.504-506.1261.

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Biomass materials such as wood are attracting renewed attention as alternative fuels in order to help resolve environmental resources caused by the use of fossil fuels. In this study, the possibility of products being processed from wood bulk was investigated by means of boss forming using open-die forging. Additionally, the difference in formability and deformation behavior during forging was investigated by changing the experimental conditions, such as the moisture content of the wood billets used, the forming pressure, and the forming temperature. The experimental results showed that wood h

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2

Zemljic, Borut. "Abomasal displacement in cattle." Veterinarski glasnik 57, no. 5-6 (2003): 335–48. http://dx.doi.org/10.2298/vetgl0306335z.

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Left abomasal displacement can be treated among other techniques also with the rolling technique accompanied with a percutaneus paramedian abomasopexy using toggle pin fixators of cornel wood. This method is reliable, quick and cheap.

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3

Pereira, Rodrigo Allan, Francisco Carlos Gomes, Roberto Alves Braga Júnior, and Fernando Pujaico Rivera. "DISPLACEMENT MEASUREMENT IN SAWN WOOD AND WOOD PANEL BEAMS USING PARTICLE IMAGE VELOCIMETRY." CERNE 25, no. 1 (March 2019): 110–18. http://dx.doi.org/10.1590/01047760201925012619.

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4

Jones, Michael T., and Paul R. Sievert. "Effects of Stochastic Flood Disturbance on Adult Wood Turtles, Glyptemys insculpta, in Massachusetts." Canadian Field-Naturalist 123, no. 4 (October 1, 2009): 313. http://dx.doi.org/10.22621/cfn.v123i4.1000.

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The homing ability of non-marine turtles has been studied in a variety of taxa, and many species appear to be capable of short-range homing on the scale of several hundred meters or a few kilometers following experimental displacement. However, the behavioral response of turtles following a naturally caused displacement has seldom been reported. In this paper, we describe the effect of displacement ranging from 1.4 to 16.8 km (average = 4.8 km) by severe floods in a stream system in Massachusetts. We radio-tracked 38 adult Wood Turtles (Glyptemys insculpta) at five separate sites in Franklin C

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5

Lee, M. C., Y. L. Tsai, R. Z. Wang, and M. L. Lin. "Finding the displacement of wood structure in heritage building by 3D laser scanner." ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences II-5/W3 (August 11, 2015): 165–69. http://dx.doi.org/10.5194/isprsannals-ii-5-w3-165-2015.

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Heritage buildings are highly prone to long term damage from the microclimate, scourge and vandalism, which can result in damaged materials, structures, painting and cultural heritage items. This study will focus on finding the displacement of wood structural members through the use of a 3D laser scanner and the 4D concept of time. The results will compare the scans from different periods to find the difference (if any) in the structural member position. Wood structures usually consist of numerous wood members connected to form the structure. However, these members can be damaged in various wa

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6

Sadiyo, Sucahyo, Imam Wahyudi, Fengky Satria Yoresta, Nurhasanah, and Muhammad Sholihin. "ANALISIS KEKUATAN SAMBUNGAN GESER GANDA ENAM JENIS KAYU PADA BERBAGAI SESARAN MENURUT DIAMETER DAN JUMLAH BAUT." PERENNIAL 8, no. 2 (October 1, 2012): 52. http://dx.doi.org/10.24259/perennial.v8i2.215.

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This research aims to determine the effect of double shear connection strength of six types of timber in various displacement based on diameter and the number of bolts. Six types of wood used are bangkirai, punak, meranti, sengon, bintangur and kapur. Double shear connection consists of the main member (wood) and side member (steel plate) with bolts connected. The average moisture content of sengon, meranti, bintangur and bangkirai are relatively similar (about 12 %), while kapur and punak are slightly higher at around 14 %. In contrast, the average density of six wood species are greatly vary

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7

Silva, Filipe G. A., Jose Xavier, Fábio A. M. Pereira, José J. L. Morais, Nuno Dourado, and Marcelo F. S. F. Moura. "Determination of cohesive laws in wood bonded joints under mode I loading using the DCB test." Holzforschung 67, no. 8 (December 1, 2013): 913–22. http://dx.doi.org/10.1515/hf-2013-0012.

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Abstract The cohesive laws (CLs) have been investigated by means of direct and inverse methods concerning wood bonded joints under pure mode I. The experimental results were obtained by tests with double cantilever beam. The direct method is based on the differentiation of the relation between strain energy release rate and crack opening displacement at the crack tip. An equivalent crack method was used to evaluate the strain energy release rate in the course of the test without monitoring the crack length, which is difficult to observe exactly. The crack opening displacement was determined by

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8

Sebera, Václav, Miguel Redón-Santafé, Martin Brabec, David Děcký, Petr Čermák, Jan Tippner, and Jaromír Milch. "Thermally modified (TM) beech wood: compression properties, fracture toughness and cohesive law in mode II obtained from the three-point end-notched flexure (3ENF) test." Holzforschung 73, no. 7 (June 26, 2019): 663–72. http://dx.doi.org/10.1515/hf-2018-0188.

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AbstractThe fracture properties of thermally modified beech (Fagus sylvatica) wood (TMW) at 180° and 200°C were evaluated in mode II using the three-point end-notched flexure (3ENF) scheme assisted by three-dimensional (3D) stereovision equipment for obtaining displacements and strains. The compliance-based beam method (CBBM) provided the strain energy release rates (GII) of TMW and cohesive laws for both native wood (W) and TMW. Based on the CBBM and equivalent crack length approach (ECLA),GIIwas obtained directly from the force-deflection data. The thermal modification (TM) process reduced t

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9

İşleyen, Ümmü K., Rahim Ghoroubi, Ömer Mercimek, Özgür Anil, and Recep Tuğrul Erdem. "Behavior of glulam timber beam strengthened with carbon fiber reinforced polymer strip for flexural loading." Journal of Reinforced Plastics and Composites 40, no. 17-18 (April 9, 2021): 665–85. http://dx.doi.org/10.1177/0731684421997924.

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In the last 20 years, the use of wooden structures and their dimensions have gradually increased. The wood application has increased in different structures such as multistory buildings, sports, industrial facilities, road and railway bridges, power transmission lines, and towers. The widespread use and size of wood structures have increased the research on developing special types of wood products supported by composite materials. Laminated wood elements are the leading composite wood materials. Laminated wooden beams allow making much larger openings than standard solid wood structural eleme

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10

Abdullah, Nur Dalila, Ummi Raba'ah Hashim, Sabrina Ahmad, and Lizawati Salahuddin. "Analysis of texture features for wood defect classification." Bulletin of Electrical Engineering and Informatics 9, no. 1 (February 1, 2020): 121–28. http://dx.doi.org/10.11591/eei.v9i1.1553.

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Selecting important features in classifying wood defects remains a challenging issue to the automated visual inspection domain. This study aims to address the extraction and analysis of features based on statistical texture on images of wood defects. A series of procedures including feature extraction using the Grey Level Dependence Matrix (GLDM) and feature analysis were executed in order to investigate the appropriate displacement and quantisation parameters that could significantly classify wood defects. Samples were taken from the KembangSemangkuk (KSK), Meranti and Merbau wood species. Fi

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11

Shenton III, Harry W., David W. Dinehart, and Timothy E. Elliott. "Stiffness and energy degradation of wood frame shear walls." Canadian Journal of Civil Engineering 25, no. 3 (June 1, 1998): 412–23. http://dx.doi.org/10.1139/l97-108.

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Tests have been conducted on wood frame shear walls to characterize the degradation of stiffness and energy dissipation that occurs under cyclic loading. A total of eight walls were tested, four sheathed in plywood and four sheathed in oriented-strand board. The tests were conducted in accordance with a draft test procedure recently proposed by the Structural Engineers Association of Southern California, which is based on a sequential phased displacement command input. The results indicate that effective stiffness decreases linearly with continued cycling at the same displacement and decreases

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12

Tukiainen, Pekka, and Mark Hughes. "The fracture behavior of birch and spruce in the radial-tangential crack propagation direction at the scale of the growth ring." Holzforschung 67, no. 6 (August 1, 2013): 673–81. http://dx.doi.org/10.1515/hf-2012-0139.

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Abstract Crack-tip displacement fields have been computed based on digital image correlation for spruce (Picea abies [L.] Karst.) and birch (Betula pendula Roth.) wood, which were submitted to pure mode I loading in the RT-direction under both green and air-dried conditions. Moreover, crack propagation was modeled based on both linear elastic fracture mechanics (LEFM) and nonlinear fracture mechanics, relying on the fictitious crack model (FCM). The measured and modeled load versus the crack-mouth opening displacement (CMOD) curves and displacement fields were compared. In the case of spruce,

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13

Nilsson, Christer, and Gunnel Grelsson. "The effects of litter displacement on riverbank vegetation." Canadian Journal of Botany 68, no. 4 (April 1, 1990): 735–41. http://dx.doi.org/10.1139/b90-097.

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The hypotheses that litter deposition on riverbanks would depend on riverbank features and that litter mass would affect riverbank vegetation were tested by sampling vegetation, litter, and soil along a seventh-order stretch of the unregulated Vindel River in northern Sweden. Sampling was carried out within a horizontal litter gradient at the top of the riverbank where most of the litter deposition occurs. The amount of leaf litter left on the riverbank after flooding was significantly correlated (P < 0.05) with soil organic matter. In contrast, wood litter mass and total litter mass were n

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14

Loss, Cristiano, Maurizio Piazza, and Daniele Zonta. "A New Method to Assess the Seismic Vulnerability of Existing Wood Frame Buildings." Advanced Materials Research 778 (September 2013): 486–94. http://dx.doi.org/10.4028/www.scientific.net/amr.778.486.

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This paper aims at applying a direct displacement-based method to assess the seismic vulnerability of existing multi-storey wooden buildings. This procedure is consistent with Priestley’s direct methodology firstly developed for reinforced concrete structures. The distinctive characteristic of the proposed method is that the system response is quantified through the use of displacements instead of equivalent elastic strengths, according to the traditional force-based approaches. Consequently, in comparison to common force-based procedures, this method cannot only be considered as a rational al

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15

Langlois, Jeffrey D., Rakesh Gupta, and Thomas H. Miller. "Effects of Reference Displacement and Damage Accumulation in Wood Shear Walls." Journal of Structural Engineering 130, no. 3 (March 2004): 470–79. http://dx.doi.org/10.1061/(asce)0733-9445(2004)130:3(470).

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16

Sathre, Roger, and Jennifer O’Connor. "Meta-analysis of greenhouse gas displacement factors of wood product substitution." Environmental Science & Policy 13, no. 2 (April 2010): 104–14. http://dx.doi.org/10.1016/j.envsci.2009.12.005.

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17

Cao, Jun, Ming Bao Li, Xiu Mei Zhang, Jia Wei Zhang, and Na Zhang. "Modeling Growth Ring Mechanical Properties of Coniferous Wood Based on FEM." Advanced Materials Research 426 (January 2012): 106–11. http://dx.doi.org/10.4028/www.scientific.net/amr.426.106.

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The mechanical properties’ modeling of coniferous growth ring based on finite element method is present in this paper. With the basic unit boundary conditions of stress and displacement, the constitutive relation is established between macro and micro-volume field. The multi-layer model of growth ring is 3 layers, such as early wood, transition wood and latewood layer. The first order displacement field equation is substituted into the micro-variable differential to build the balance equation which has the periodic characteristics. Single-cell finite element model is calculated out using APDL

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18

Majano-Majano, Almudena, Antonio Lara-Bocanegra, José Xavier, and José Morais. "Measuring the Cohesive Law in Mode I Loading of Eucalyptus globulus." Materials 12, no. 1 (December 21, 2018): 23. http://dx.doi.org/10.3390/ma12010023.

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Assessing wood fracture behavior is essential in the design of structural timber elements and connections. This is particularly the case for connections with the possibility of brittle splitting failure. The numerical cohesive zone models that are used to simulate the fracture behavior of wood make it necessary to assume a cohesive law of the material that relates cohesive tractions and crack opening displacements ahead of the crack tip. This work addresses the determination of the fracture cohesive laws of Eucalyptus globulus, a hardwood species with great potential in timber engineering. Thi

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19

Paltanea, Gheorghe, Veronica Paltanea, Dorina Popovici, George Papanicolaou, and Mihael Sultan. "A Combined Model for the Stress State Evaluation in Single Overlap Joints Using Piezo-Ceramic Actuators." Materials Science Forum 792 (August 2014): 127–32. http://dx.doi.org/10.4028/www.scientific.net/msf.792.127.

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In this paper is presented a 2D approach to finite element modeling of a single lap bonded joint. As adherent material a sheet wood was selected and as adhesive, Bison Super Wood D3. In the article a combined method is described, consisting in the placement of piezoelectric actuators on the surface of bonded joint, in order to determine the tensile stress in the overlap joint. A comparison between the experimental, analytical and numerical results has been achieved through a multiphysics modeling - electrical and mechanical coupled problem, in order to evaluate the experimental outcomes. The e

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20

Hlavata, Vera, Pavel Kuklik, and Martin Hataj. "Coefficients of Transverse Contraction of the Wood Cell Constituents and their Effect on the Cell Behavior." Key Engineering Materials 714 (September 2016): 20–24. http://dx.doi.org/10.4028/www.scientific.net/kem.714.20.

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Wood cells are composed of cellulose, hemicellulose, and lignin. Geometrically we can idealize them as a set of hollow cylinders touching each other on the cylinder surface. The continuous displacements and stress state transmission are assumed on the cylinder surfaces. The article investigates stress development which is influenced by the wood cell axial elongation. Material properties of individual constituents are generally described by nine parameters characterizing orthotropic elastic material. Transversely isotropic constitutive model of was chosen for simplification. The analytical solu

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21

Mikulová, P., and D. Frynta. "Test of character displacement in urban populations of Apodemus sylvaticus." Canadian Journal of Zoology 79, no. 5 (May 1, 2001): 794–801. http://dx.doi.org/10.1139/z01-035.

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We studied the wood mouse, Apodemus sylvaticus, inhabiting parks, cemeteries, suburban woods, and other green areas in the city of Prague. To assess the character displacement and (or) release hypothesis we compared seven samples from local populations occurring sympatrically with Apodemus flavicollis with 10 samples from those localities in which A. flavicollis has never been recorded. The analysis included 1410 specimens of A. sylvaticus collected during the years 19801990. Seventeen skull and body characters were measured. Then the data were age- or size-adjusted and treated by principal-c

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22

Li, Jingkui, Ruoying Wang, He Tian, Yanan Wang, and Dawei Qi. "Research on the Gradual Process of the Metallization Structures and Mechanical Properties of Wood Veneer." Symmetry 10, no. 11 (October 26, 2018): 550. http://dx.doi.org/10.3390/sym10110550.

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In order to improve the mechanical properties of the wood surface and explore the mechanical effect of wood veneer surface metallization, the 31-year-old Pinus sylvestris is taken as the research object and Cu is deposited on the wood surface by magnetron sputtering to achieve wood veneer metallization. Based on X-ray diffraction (XRD) and nanoindentation, a research on the gradual process of the structures and mechanical properties of wood veneer metallization was carried out. The results indicate that wood veneer metallization does not affect the crystallization zone of wood, there are still

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23

Priyono, Dwi Joko, Surjono Surjokusumo, Yusuf S. Hadi, and Naresworo Nugroho. "Equations of the Sum of Shear Connector on the Double Shear Connection Strength using Different Connector Materials." Wood Research Journal 4, no. 1 (April 19, 2017): 81–86. http://dx.doi.org/10.51850/wrj.2012.3.2.81-86.

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Mangium wood from the timber estate have been developed continuously in an effort to reach the fulfilling of wood fiber and construction material needs to replace role of timber from the natural forests which has been decreased. Timber connection requires a connector such as bolt that can distribute both the load of wood to wood and the compression or tensile stress through all the connections. Bearing slip is a connector that is inserted into a hole in the wood, which bears pressure and shear. Bolted connection is the most commonly used because it is easy to apply, even though it is less effi

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24

ISODA, Hiroshi, and Shinya NAKAMURA. "SEISMIC PERFORMANCE EVALUATION OF WOOD SHEAR WALLS COMBINED VARIOUS LOAD-DISPLACEMENT RELATIONSHIPS." Journal of Structural and Construction Engineering (Transactions of AIJ) 73, no. 627 (2008): 781–86. http://dx.doi.org/10.3130/aijs.73.781.

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25

Wang, Yue, David V. Rosowsky, and Weichiang Pang. "Performance-Based Procedure for Direct Displacement Design of Engineered Wood-Frame Structures." Journal of Structural Engineering 136, no. 8 (August 2010): 978–88. http://dx.doi.org/10.1061/(asce)st.1943-541x.0000188.

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26

Hajdarević, Seid, Murčo Obućina, Elmedin Mešić, and Sandra Martinović. "Stress and Strain Analysis of Plywood Seat Shell." Drvna industrija 70, no. 1 (March 26, 2019): 51–59. http://dx.doi.org/10.5552/drvind.2019.1825.

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In this paper, the stress and strain analysis of common laminated wood seat shell is performed. Experimental stiffness evaluation is conducted by measuring displacement of the point on the backrest, and experimental stress analysis is carried out by tensometric measuring at the critical transition area from the seat to the backrest. Finite element analysis is carried out layer by layer with a “2D linear elastic model” for orthotropic materials. Good matching is found between numerical and experimental results of displacement. It is also shown that the results of the principal stress in the mea

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27

Seppälä, Jyri, Tero Heinonen, Timo Pukkala, Antti Kilpeläinen, Tuomas Mattila, Tanja Myllyviita, Antti Asikainen, and Heli Peltola. "Effect of increased wood harvesting and utilization on required greenhouse gas displacement factors of wood-based products and fuels." Journal of Environmental Management 247 (October 2019): 580–87. http://dx.doi.org/10.1016/j.jenvman.2019.06.031.

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28

Naghdi, R., I. Bagheri, M. Lotfalian, and B. Setodeh. "Rutting and soil displacement caused by 450C Timber Jack wheeled skidder (Asalem forest northern Iran)." Journal of Forest Science 55, No. 4 (March 25, 2009): 177–83. http://dx.doi.org/10.17221/102/2008-jfs.

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The use of skidding machinery in logging operations causes destructive effects especially on soil but has many advantages such as extracting long and heavy logs, optimum use of useful logging time and absence of defect in wood production quality and thus an increase in the added value of wood. In this research compartment 40 of the second district of Nav-Asalem in northern Iran at an altitude of 1,050–1,450 m above sea level was chosen in order to assess the amount of displaced soil volume and depth of ruts due to the traffic of Timber Jack 450C rubber wheeled skidder along the skid trail. The

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29

Craciun, Eduard Marius, Tomasz Sadowski, Liviu Marsavina, and Adrian Rabaea. "Mathematical Aspects Regarding Cracks Behaviour in Wood Composites." Key Engineering Materials 601 (March 2014): 108–11. http://dx.doi.org/10.4028/www.scientific.net/kem.601.108.

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In this paper we study the interaction of two unequal collinear cracks in a pre-stressed fiber reinforced wood composite material in anti-plane mode of fracture. A mathematical model is associated to the mechanical problem. Starting from the boundary, constitutive and far field conditions we obtain the representation of the incremental displacement, stress and strain fields using two complex potentials. Using Sih s generalized fracture criterion we determine the critical incremental shear stress which produce crack propagation and the crack tips propagation direction in a particular case of a

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Parameswaran, V. R. "Adfreezing strength of ice to model piles." Canadian Geotechnical Journal 24, no. 3 (August 1, 1987): 446–52. http://dx.doi.org/10.1139/t87-055.

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Results of tests to determine the adfreezing strength of freshwater ice to piles having different surface characteristics show that adfreeze strength increases with increase in the rate of displacement and loading of the pile. Surface coatings such as creosote on wood piles and paint and silicone sealer on metallic piles drastically decrease the adfreezing strength of ice. Key words: adfreezing strength, displacement rate, ice, loading rate, model piles, surface coating.

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Craciun, Eduard Marius, and Tomasz Sadowski. "Mathematical Modelling of the Crack Propagation in Wood Materials." Key Engineering Materials 399 (October 2008): 177–82. http://dx.doi.org/10.4028/www.scientific.net/kem.399.177.

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In this paper we study the behaviour of a Mode I crack in a pre-stressed wood composite material. A mathematical model is associated to the mechanical problem. Starting from the boundary, constitutive and far field conditions we obtain the representation of the incremental displacement, stress and strain fields using two complex potentials. Using numerical analysis we determine the critical value, which causes crack propagation and the direction of crack propagation in a particular case of a Pine wood composite.

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Poltorak, Benjamin J., Eric R. Labelle, and Dirk Jaeger. "Soil displacement during ground-based mechanized forest operations using mixed-wood brush mats." Soil and Tillage Research 179 (June 2018): 96–104. http://dx.doi.org/10.1016/j.still.2018.02.005.

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Vrtiska, Mark P., Richard M. Kaminski, Harold H. Prince, and John D. Thompson. "Geographical displacement and timing of molt of the remiges in male Wood Ducks." Canadian Journal of Zoology 75, no. 9 (September 1, 1997): 1545–48. http://dx.doi.org/10.1139/z97-780.

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Captive wild-strain male Wood Ducks, Aix sponsa, reared in Mississippi and transported to Michigan and Illinois in 1993 and 1994 were used to test the effect of geographical displacement and age on timing of molt of the remiges. Males transported to both northern sites initiated remex molt later (P = 0.0001) in 1993 than males remaining in Mississippi. In 1994, males continued to molt later at northern sites than in Mississippi, but earlier molting at both northern sites in 1994 than in 1993 resulted in no detectable differences (P = 0.31) in molting date. Although there were no differences (P

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Poirier, N. A., W. J. M. Douglas, and R. H. Crotogino. "Axial dispersion models for displacement washing of packed beds of wood pulp fibres." Canadian Journal of Chemical Engineering 66, no. 6 (December 1988): 936–44. http://dx.doi.org/10.1002/cjce.5450660607.

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Sandak, Jakub, and Chiaki Tanaka. "Evaluation of surface smoothness by laser displacement sensor 1: effect of wood species." Journal of Wood Science 49, no. 4 (August 2003): 305–11. http://dx.doi.org/10.1007/s10086-002-0486-6.

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Chen, C. Y., F. A. Boudreault, A. E. Branston, and C. A. Rogers. "Behaviour of light-gauge steel-frame – wood structural panel shear walls." Canadian Journal of Civil Engineering 33, no. 5 (May 1, 2006): 573–87. http://dx.doi.org/10.1139/l06-015.

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The second phase of the research project to develop a shear wall design method that could be used in conjunction with the 2005 National Building Code of Canada involved evaluation of the performance characteristics of the tested steel-frame – wood structural panel shear walls. A nonlinear and pinched resistance versus deflection hysteretic behaviour was exhibited, although in most cases the walls could sustain large inelastic deformation cycles with limited strength degradation. A significant amount of energy could be dissipated under reversed cyclic loading. Walls 1220 mm and 2440 mm in lengt

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Oliveira, Jorge, José Xavier, Fábio Pereira, José Morais, and Marcelo de Moura. "Direct Evaluation of Mixed Mode I+II Cohesive Laws of Wood by Coupling MMB Test with DIC." Materials 14, no. 2 (January 14, 2021): 374. http://dx.doi.org/10.3390/ma14020374.

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Governing cohesive laws in mixed mode I+II loading of Pinus pinaster Ait. are directly identified by coupling the mixed mode bending test with full-field displacements measured at the crack tip by Digital Image Correlation (DIC). A sequence of mixed mode ratios is studied. The proposed data reduction relies on: (i) the compliance-based beam method for evaluating strain energy release rate; (ii) the local measurement of displacements to compute the crack tip opening displacement; and (iii) an uncoupled approach for the reconstruction of the cohesive laws and its mode I and mode II components. Q

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Sadiyo, Sucahyo, and Emma Yusrina Wulandari. "PENGARUH DIAMETER DAN JUMLAH PAKU TERHADAP KEKUATAN SAMBUNGAN GESER GANDA BALOK KAYU NANGKA (Artocarpus heterophyllus) dan RASAMALA (Altingia excelsa Noronha) DENGAN PELAT BAJA." PERENNIAL 8, no. 1 (April 1, 2012): 36. http://dx.doi.org/10.24259/perennial.v8i1.213.

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The application of nail connection for part of the structural construction in Indonesia is still become the main choice. Connection type that must be counted on seriously for structural construction, are tension, shear and momen connection. Nangka wood is a type of woods that available in sawing or community woods work around Bogor. Rasamala is endemic and unique woods from West Java. Nails as connection are cheap, available and workable. This research objective is to investigate the effect of diameter and amount of nails to double shear connection strength on two type of woods. The results sh

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Persi, Elisabetta, Gabriella Petaccia, Stefano Sibilla, Roberto Bentivoglio, and Aronne Armanini. "A One-Way Coupled Hydrodynamic Advection-Diffusion Model to Simulate Congested Large Wood Transport." Hydrology 8, no. 1 (January 27, 2021): 21. http://dx.doi.org/10.3390/hydrology8010021.

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An advection-diffusion model is proposed to simulate large wood transport during high flows. The mathematical model is derived from the wood mass balance, taking into consideration both the wood mass concentration and the log orientation, which affects log transport and, most importantly, wood accumulation. Focusing on wood mass transport, the advection-diffusion equation is implemented in a hydrodynamic model to provide a one-way coupled solution of the flow and of the floating wood mass. The model is tested on a large series of flume experiments, involving at least 30 logs and different cont

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Sebera, Václav, and Jan Tippner. "Possible use of the hyperelastic material models in numerical analysis of the wood-strand mat compression." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 57, no. 4 (2009): 83–94. http://dx.doi.org/10.11118/actaun200957040083.

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The main goal of the work was to evaluate a possibility of using various hyperelastic material models implemented into ANSYS computational system for the numerical analysis of wood-strand mat pressing or wood-based composites. Subsequently, the most suitable hyperelastic model was used as a material model in compression simulation. Pressing itself was modelled as a contact transient analysis with wood-strand mat being defined as a homogenous and isotropic continuum with the chosen material model. In the analysis only displacement degrees of freedom are considered. Output of the simulation i

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41

Rittenhouse, Tracy A. G., and Raymond D. Semlitsch. "Behavioral response of migrating wood frogs to experimental timber harvest surrounding wetlands." Canadian Journal of Zoology 87, no. 7 (July 2009): 618–25. http://dx.doi.org/10.1139/z09-049.

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Abstract (sommario):

Behavioral responses to ecological disturbances such as timber harvest, fire, or drought provide insight into wildlife habitat requirements. To determine the behavioral response of adult wood frogs ( Lithobates sylvatica (LeConte, 1825)) to timber harvest in oak–hickory forest, we conducted experimental timber harvest surrounding replicate breeding sites, monitored freely moving frogs using radiotelemetry, and tested the repeatability of behavioral responses with two experimental displacements. We found no evidence that wood frogs use recent oak–hickory clearcuts as habitat. Timber harvest was

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42

Fajdiga, Gorazd, Denis Rajh, Branko Nečemer, Srečko Glodež, and Matjaž Šraml. "Experimental and Numerical Determination of the Mechanical Properties of Spruce Wood." Forests 10, no. 12 (December 13, 2019): 1140. http://dx.doi.org/10.3390/f10121140.

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The objective of this paper is the computational and experimental study of the fracture behavior of spruce wood under quasi-static loading conditions during a three-point bending test. The experimental tests were performed on the electronic testing machine Zwick Z100 (Zwick-Roell GmbH & Co. KG, Ulm, Germany) with displacement control, according to the standard International Standard Organisation (ISO) 13061-4: 2014. The specimens were made of Norway spruce (Picea abies) wood, with dimensions of 25 mm × 25 mm in cross-section and 549 mm in length. Six tests were performed for each orientati

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43

Huang, Yi Hui, and Meng Ting Tsai. "Amplification Factor for Wood-Concrete Hybrid Structures Based on Dynamic Numerical Simulation." Key Engineering Materials 873 (January 2021): 65–69. http://dx.doi.org/10.4028/www.scientific.net/kem.873.65.

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Abstract (sommario):

Extensive concerns on environmental protection have provoked low-carbon buildings to be the mainstream of building construction worldwide, and wooden structures in this sense outperform other structural forms. Wooden-concrete hybrid structures featuring distinct wooden and concrete stories typically exhibit uneven stiffness distribution along the structure height; in particular, abrupt stiffness changes occur at the wood-concrete transition stories. Therefore, structural designing of such hybrid structures must consider a stiffness amplification effect in the static structural calculation as w

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44

Pearson, Hamish, Sigurdur Ormarsson, and Brian Gabbitas. "Nonlinear tensile creep behavior of radiata pine at elevated temperatures and different moisture contents." Holzforschung 69, no. 7 (September 1, 2015): 915–23. http://dx.doi.org/10.1515/hf-2014-0240.

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Abstract (sommario):

Abstract Tensile wood creep has not been measured previously in the temperature region 135°C–150°C for a range of moisture content (MC) up to fiber saturation point due to equipment and measurement challenges. Yet this is the region where the most dramatic softening effects can be observed. The aim of this study was to develop specialized equipment to measure tensile solid wood creep over 70°C–150°C for a range of MC and loads. Creep displacement was successfully able to be isolated from elastic and mechanosorptive strains and statistically modeled by regression analysis. This proved more accu

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45

Ntenga, Richard, Serges Lahe, Jean Atangana Ateba, and Tibi Beda. "Numerical Simulations of Azobé/Urea Formaldehyde Wood Plastic Composite Behaviors under Charpy Impact and Low-Velocity Drop Weight Tests." Journal of Composites Science 2, no. 4 (October 17, 2018): 60. http://dx.doi.org/10.3390/jcs2040060.

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Abstract (sommario):

This work is concerned with the study of the influence of impactor’s velocity parameters, impactor’s geometry, the target plate properties, and thickness, on the response of a tropical wood plastic composite (WPC) Azobé/urea formaldehyde (Az/UF) plate under impact loading. Variations of the impact force, displacement, deformation, and impact energy of the specimens with weight fractions of 10, 20, 30, 40, and 50% have been considered in finite element analysis (FEA) simulations. The simulations of the Charpy and of a drop weight impact test on the WPC were carried out using the explicit dynami

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46

Wolf, Christian, Daniel Klein, Klaus Richter, and Gabriele Weber-Blaschke. "Mitigating environmental impacts through the energetic use of wood: Regional displacement factors generated by means of substituting non-wood heating systems." Science of The Total Environment 569-570 (November 2016): 395–403. http://dx.doi.org/10.1016/j.scitotenv.2016.06.021.

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47

Li, Chao, Xilong Wang, and Yizhuo Zhang. "Structural design and mechanical properties analysis of bamboo-wood cross-laminated timber." BioResources 15, no. 3 (May 27, 2020): 5417–32. http://dx.doi.org/10.15376/biores.15.3.5417-5432.

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Abstract (sommario):

To explore the overall mechanical properties of bamboo-wood composite cross-laminated timber (BCLT), a simulation model of BCLT mechanical behavior based on the solid element was established using the finite element software ABAQUS. The actual four-point bending experiment was compared and analyzed with the finite element numerical simulation. The total curve error coefficient of the BCLT specimen at 18-mm displacement was 0.2988 while the interval was 0.5 mm. The error coefficient was 0.0178 when the maximum load was reached, and the minimum error coefficient was 0.0015 at 12 mm of displaceme

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48

ISODA, Hiroshi. "VERIFICATION OF HYSTERESIS MODEL OF WOOD SHEAR WALL CONSIDERING OF LARGE DISPLACEMENT UNDER EARTHQUAKES." Journal of Structural and Construction Engineering (Transactions of AIJ) 76, no. 659 (2011): 113–20. http://dx.doi.org/10.3130/aijs.76.113.

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49

Pang, Wei Chiang, and David V. Rosowsky. "Direct Displacement Procedure for Performance-Based Seismic Design of Mid-Rise Wood-Framed Structures." Earthquake Spectra 25, no. 3 (August 2009): 583–605. http://dx.doi.org/10.1193/1.3158932.

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Abstract (sommario):

This paper presents a direct displacement design (DDD) procedure that can be used for seismic design of multistory wood-framed structures. The proposed procedure is applicable to any pure shear deforming system. The design procedure is a promising design tool for performance-based seismic design since it allows consideration of multiple performance objectives (e.g., damage limitation, safety requirements) without requiring the engineer to perform a complex finite element or nonlinear time-history analysis of the complete structure. A simple procedure based on normalized modal analysis is used

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50

Rossi, Simone, Ivan Giongo, Daniele Casagrande, Roberto Tomasi, and Maurizio Piazza. "Evaluation of the displacement ductility for the seismic design of light-frame wood buildings." Bulletin of Earthquake Engineering 17, no. 9 (June 8, 2019): 5313–38. http://dx.doi.org/10.1007/s10518-019-00659-4.

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