Evaluating Log Stiffness Using Acoustic Velocity for Manufacturing Structural Oriented Strand Board

IF 0.8 4区 工程技术 Q3 FORESTRY
Tracye M. Murphy, L. Schimleck, Albert Landers
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引用次数: 0

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.
用声速评价结构定向刨花板的原木刚度
定向刨花板(OSB)是一种工程板材产品,通过将特定方向的再生木材分层到垫子中,然后在高温下压制垫子,形成具有所需强度和刚度的板材。OSB生产设施利用疏伐作业产生的小直径原木和收割产生的废物。原材料的木材特性存在相当大的变化,理想情况下OSB行业会利用这种变化,然而,它缺乏现场快速评估原木质量所需的技术。基于声学的无损评估(NDE)技术有可能在现场快速分离原木,然而,基于声学的原木分离对OSB面板性能的影响尚不清楚。该项目的目的是确定原木质量是否会影响面板性能,以及声学无损检测技术是否是在进入制造过程之前确定原木刚度的令人满意的工具。研究发现,低速(刚度)原木生产出具有低刚度的面板,而高速和中速(刚度”)原木生产的面板具有相似的性能。Director HM 200是确定原木刚度的一个令人满意的工具。需要进一步研究,以确定如何将无损检测工具纳入制造过程。
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来源期刊
Wood and Fiber Science
Wood and Fiber Science 工程技术-材料科学:纺织
CiteScore
7.50
自引率
0.00%
发文量
23
审稿时长
>12 weeks
期刊介绍: W&FS SCIENTIFIC ARTICLES INCLUDE THESE TOPIC AREAS: -Wood and Lignocellulosic Materials- Biomaterials- Timber Structures and Engineering- Biology- Nano-technology- Natural Fiber Composites- Timber Treatment and Harvesting- Botany- Mycology- Adhesives and Bioresins- Business Management and Marketing- Operations Research. SWST members have access to all full-text electronic versions of current and past Wood and Fiber Science issues.
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