Assessing 2 by 6 Southern Pine Lumber Flexural and Tensile Properties with Nondestructive Techniques

IF 1.1 4区农林科学 Q3 FORESTRY

Forest Products Journal Pub Date : 2023-01-01 DOI:10.13073/fpj-d-22-00055

M. G. C. Uzcategui, F. França, R. D. Seale, R. Ross, C. A. Senalik

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引用次数: 0

Abstract

The objective of this study was to assess the flexural and tensile properties of 702 pieces of No. 2 grade 2 by 6 southern pine lumber using nondestructive testing (NDT) techniques. Longitudinal and transverse vibration techniques were used to test each specimen. The mean dynamic modulus of elasticity in the longitudinal direction was 11,246 MPa, and the mean transverse vibration dynamic modulus of elasticity was 11,491 MPa. Proof-loading bending tests were conducted on each specimen. The mean bending modulus of elasticity (MOE) was 10,615 MPa. Each specimen was then destructively tested in tension parallel to the grain to determine tension MOE (Et) and ultimate tensile stress (UTS). The overall mean for Et was 11,339 MPa and the UTS mean was 28.54 MPa. Correlations between growth characteristics, and physical and mechanical properties were analyzed. From the linear regression analysis, a strong relationship between Et and dynamic MOE was found using both NDT tools. Multivariable regression models were developed to improve UTS estimation. NDT techniques are recommended for the estimation of mechanical properties of No. 2 grade 2 by 6 southern pine lumber.

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用无损技术评价2 × 6南松木材的弯曲和拉伸性能

本研究的目的是利用无损检测(NDT)技术评估702块2级6南松木材的弯曲和拉伸性能。采用纵向和横向振动技术对每个试件进行测试。纵向平均动力弹性模量为11246 MPa，横向平均动力弹性模量为11491 MPa。对每个试件进行了抗压弯曲试验。平均弯曲弹性模量(MOE)为10,615 MPa。然后在平行于晶粒的拉伸下对每个试样进行破坏测试，以确定拉伸MOE (Et)和极限拉伸应力(UTS)。Et的总平均值为11339 MPa, UTS的平均值为28.54 MPa。分析了生长特性与物理力学性能之间的相关性。从线性回归分析中，发现两种无损检测工具的Et与动态MOE之间存在很强的关系。开发了多变量回归模型来改进UTS估计。推荐采用无损检测技术对6种南松2级木材的力学性能进行评估。

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来源期刊

Forest Products Journal 工程技术-材料科学：纸与木材

CiteScore

2.10

自引率

11.10%

发文量

审稿时长

6-12 weeks

期刊介绍： Forest Products Journal (FPJ) is the source of information for industry leaders, researchers, teachers, students, and everyone interested in today''s forest products industry. The Forest Products Journal is well respected for publishing high-quality peer-reviewed technical research findings at the applied or practical level that reflect the current state of wood science and technology. Articles suitable as Technical Notes are brief notes (generally 1,200 words or less) that describe new or improved equipment or techniques; report on findings produced as by-products of major studies; or outline progress to date on long-term projects.