Wood and Fiber Science最新文献_第4页

MOE Distribution in Visually graded Ponderosa Pine Lumber Harvested from Restoration Programs in Southern Oregon and Northern California 俄勒冈州南部和加利福尼亚州北部恢复项目中目测分级的松木材的MOE分布

IF 1.4 4区工程技术

Wood and Fiber Science Pub Date : 2022-06-03 DOI: 10.22382/wfs-2022-10

Sina Jahedi, L. Muszynski, M. Riggio, Benjamin Brice Blengino, S. Bhandari

{"title":"MOE Distribution in Visually graded Ponderosa Pine Lumber Harvested from Restoration Programs in Southern Oregon and Northern California","authors":"Sina Jahedi, L. Muszynski, M. Riggio, Benjamin Brice Blengino, S. Bhandari","doi":"10.22382/wfs-2022-10","DOIUrl":"https://doi.org/10.22382/wfs-2022-10","url":null,"abstract":". Every year, restoration programs in Southern Oregon and Northern California produce large amounts of low-value ponderosa pine, Pinus ponderosa (PP) lumber. This material has a limited market in the United States. Engineered wood products, such as cross-laminated timber (CLT) and glulam, are expected to provide a value-added market to offset the high costs of restoration programs. However, restoration program lumber has larger amounts of juvenile wood and visual grades are reported to show lower mechanical properties compared with commercially harvested material, on which the National Design Speci ﬁ cation (NDS) design values are based. This research addresses a knowledge gap on the impact of juvenile wood and visual strength-affecting characteristics on the mechanical performance of PP lumber generated in the region of interest. The purpose of this study was to assess this impact based on dynamically measured MOE of samples of visually graded and ungraded restoration program PP lumber. The material used in this study was intended for fabrication of CLT for another project, hence it could not be used for destructive tests to measure MOR. The results were compared with previous studies and published values for commercially harvested PP as re ﬂ ected in the NDS Western Woods (WW) species group. The results show that characteristic MOE values of visual grade Nos. 1 and 2 of PP from restoration programs were lower than","PeriodicalId":23620,"journal":{"name":"Wood and Fiber Science","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48446601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

SWST Student Chapters: A Valuable Means of Broadening Student Perspectives in Wood Science and Technology SWST学生分会：拓宽学生木材科学与技术视野的宝贵途径

IF 1.4 4区工程技术

Wood and Fiber Science Pub Date : 2022-06-03 DOI: 10.22382/wfs-2022-08

Francesco Negro, Tamara Franca, Eric Hansen

引用次数: 0

Evaluating Log Stiffness Using Acoustic Velocity for Manufacturing Structural Oriented Strand Board 用声速评价结构定向刨花板的原木刚度

IF 1.4 4区工程技术

Wood and Fiber Science Pub Date : 2022-06-03 DOI: 10.22382/wfs-2022-11

Tracye M. Murphy, L. Schimleck, Albert Landers

{"title":"Evaluating Log Stiffness Using Acoustic Velocity for Manufacturing Structural Oriented Strand Board","authors":"Tracye M. Murphy, L. Schimleck, Albert Landers","doi":"10.22382/wfs-2022-11","DOIUrl":"https://doi.org/10.22382/wfs-2022-11","url":null,"abstract":". Oriented strand board (OSB) is an engineered panel product formed by layering strands of res-inated wood in speci ﬁ c orientations into a mat, then pressing the mat at a high temperature to form a panel of desired strength and stiffness. OSB manufacturing facilities utilize small diameter logs from thinning operations and waste from harvesting. Considerable variation exists in the wood properties of the raw material and ideally the OSB industry would take advantage of such variation, however, it lacks the technology required to rapidly assess log quality on-site. Nondestructive evaluation (NDE) techniques based on acoustics have the potential to rapidly segregate logs in the ﬁ eld, however, the in ﬂ uence of acoustic-based log segregation on OSB panel properties is unknown. The aims of this project were to determine whether log quality affects panel properties and if acoustic NDE technology is a satisfactory tool for determining log stiffness before entering the manufacturing process. It was found that low-velocity (stiffness) logs produced panels with low stiffness whereas high-and medium-velocity (stiffness) logs produced panels with similar properties. The Director HM 200 was a satisfactory tool for determining log stiffness. Further studies are required to determine how to incorporate NDE tools into the manufacturing process.","PeriodicalId":23620,"journal":{"name":"Wood and Fiber Science","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41615231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of thermomechanical pulp made from pine trees infected with nematodes 线虫感染松树热机械浆的特性研究

IF 1.4 4区工程技术

Wood and Fiber Science Pub Date : 2022-02-17 DOI: 10.22382/wfs-2022-04

Chul-Hwan Kim, Jinhyeok Park, Min-Seok Lee, Chang-Yeong Lee, Jeong-Heon Ryu, Jin-Hong Park

引用次数: 0

Perception and Evaluation of (Modified) Wood by Older Adults from Slovenia and Norway 斯洛文尼亚和挪威老年人对(改性)木材的感知和评价

IF 1.4 4区工程技术

Wood and Fiber Science Pub Date : 2022-02-17 DOI: 10.22382/wfs-2022-05

D. Lipovac, S. Wie, A. Nyrud, M. Burnard

{"title":"Perception and Evaluation of (Modified) Wood by Older Adults from Slovenia and Norway","authors":"D. Lipovac, S. Wie, A. Nyrud, M. Burnard","doi":"10.22382/wfs-2022-05","DOIUrl":"https://doi.org/10.22382/wfs-2022-05","url":null,"abstract":". Many building users prefer wood over other building materials, but it is unclear how modi ﬁ ed wood is perceived compared with unmodi ﬁ ed wood. Additionally, it is unclear which material properties play a role in the general preference for wood, how tactile and tactile – visual perceptions of materials affect user preference for wood, and whether human preference for wood is consistent across countries and cultures with different wood use practices. One hundred older adults from Slovenia and Norway rated and ranked wooden materials (ie handrails) made of either unmodi ﬁ ed or modi ﬁ ed wood and a stainless steel control sample. The materials were rated on a semantic differential scale (capturing sensory and affective attributes) by each participant twice: ﬁ rst, while only touching the materials and then while simultaneously touching and seeing the materials. Finally, each participant ranked the handrails in order of preference. Wooden handrails were generally more preferred than the steel sample. Preference ratings and rankings of modi ﬁ ed wood were comparable to those of unmodi ﬁ ed wood. Results were relatively consistent across both countries. Materials rated as liked were perceived as somewhat less cold, less damp, more usual, less arti ﬁ cial, more expensive, and less unpleasant. The ratings were fairly consistent between the tactile and tactile – visual tasks. In some indoor applications, certain types of modi ﬁ ed wood could be used in place of unmodi ﬁ ed wood while meeting human aesthetical preferences. Speci ﬁ c visual and tactile properties can predict material preference and could be considered in the material design phase. The tactile experience is important in overall material perception and should not be overlooked. These ﬁ ndings seem to be stable across countries with different wood use practices.","PeriodicalId":23620,"journal":{"name":"Wood and Fiber Science","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48532576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Call for Applications: Wood and Fiber Science Editor Position 招聘:木材和纤维科学编辑职位

IF 1.4 4区工程技术

Wood and Fiber Science Pub Date : 2022-02-17 DOI: 10.22382/wfs-2022-07

S. Levan-Green

引用次数: 0

EMPIRICAL MODELS FOR PREDICTION COMPRESSION STRENGTH OF PAPERBOARD CARTON 纸板箱抗压强度预测的经验模型

IF 1.4 4区工程技术

Wood and Fiber Science Pub Date : 2022-02-17 DOI: 10.22382/wfs-2022-06

Y. Pyr’yev, E. Kibirkštis, L. Gegeckienė, K. Vaitasius, I. Venytė

引用次数: 0

Experimental Modal Analysis of a Palm Tree Log under Radial Vibrational Excitation 棕榈原木在径向振动激励下的实验模态分析