Grading lumber with acoustic-based technologies Part 2: ultimate tension stress estimation from time- and frequency-domain parameters

Wood and Fiber Science

View Publication Info
 
 
Field Value
 
Title Grading lumber with acoustic-based technologies Part 2: ultimate tension stress estimation from time- and frequency-domain parameters
 
Creator Senalik, Christopher Adam
Franca, F. J.N.
Seale, R. D.
Ross, Robert J.
Shmulsky, R.
 
Subject Mechanical
frequency; clear wood; lumber; ultimate tension stress
10.100; 10.300; 10.400
 
Description This research article summarizes results from Part 1 of a study designed to examine the use of advanced signal processing techniques with acoustic-based lumber assessment technologies to evaluate the MOE and ultimate tension stress (UTS) of structural lumber. In Part 1 of this research, a mathematical model of acoustic wave behavior in an idealized specimen is derived using fundamental mechanics. In Part 2, wave behavior is examined experimentally in a series of 38 × 38 × 2438-mm wood specimens. The specimens vary considerably in visual character. Several of the specimens are, from a visual assessment, clear of naturally occurring defects such as knots. Conversely, strength-reducing defects such as knots are visible in several specimens. The presence of naturally occurring defects can affect acoustic waves in a variety of ways. A few examples include altering wave speed, changing the wave travel path, and/or converting the wave from longitudinal waves to shear waves or back through mode conversion. These alterations can cause wave behavior to deviate from the behavior observed in clear wood specimens. Deviations are observable in both time and frequency domains. From the differences, parameters are identified which improve estimation of UTS. 
 
Publisher Wood and Fiber Science
 
Contributor USDA Forest Service
 
Date 2020-10-28
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion

 
Format application/pdf
 
Identifier http://wfs.swst.org/index.php/wfs/article/view/2962
 
Source Wood and Fiber Science; Vol 52, No 4 (2020); 390-399
0735-6161
0735-6161
 
Language eng
 
Relation http://wfs.swst.org/index.php/wfs/article/view/2962/2600
http://wfs.swst.org/index.php/wfs/article/downloadSuppFile/2962/1666
http://wfs.swst.org/index.php/wfs/article/downloadSuppFile/2962/1667
http://wfs.swst.org/index.php/wfs/article/downloadSuppFile/2962/1668
http://wfs.swst.org/index.php/wfs/article/downloadSuppFile/2962/1669
 
Rights Copyright (c) 2020 Wood and Fiber Science
 

Contact Us

The PKP Index is an initiative of the Public Knowledge Project.

For PKP Publishing Services please use the PKP|PS contact form.

For support with PKP software we encourage users to consult our wiki for documentation and search our support forums.

For any other correspondence feel free to contact us using the PKP contact form.

Find Us

Twitter

Copyright © 2015-2018 Simon Fraser University Library