Grading lumber with acoustic-based technologies Part 1: modeling acoustic (stress) wave behavior in clear wood and lumber

Authors

  • Christopher Adam Senalik USDA Forest Products Laboratory
  • F. J.N. Franca Mississippi State University http://orcid.org/0000-0001-7807-8877
  • R. D. Seale Mississippi State University
  • Robert J. Ross USDA Forest Products Laboratory
  • R. Shmulsky Mississippi State University

Keywords:

wave model, frequency, clear wood, lumber, modulus of elasticity

Abstract

This research article summarizes results from Part 1 of a study designed to examine using advanced signal processing techniques with acoustic-based lumber assessment technologies to evaluate the MOE, ultimate tension stress (UTS), and MOR of structural lumber. In Part 1 of this research article, a mathematical model of acoustic wave behavior in an idealized specimen is derived using fundamental mechanics. Published information on the physical and mechanical properties of clear, defect-free wood is input into the model to examine acoustic wave behavior. Wave behavior is then examined experimentally in a series of wood specimens. Observed wave behavior in the clear wood specimens, in both time and frequency domains, closely resembles idealized wave behavior. In Part 2 of this research article, predictions from the model are used to improve estimation of the UTS of wood specimens.

 

Author Biographies

Christopher Adam Senalik, USDA Forest Products Laboratory

Research General Engineer

USDA Forest Products Laboratory Madison

F. J.N. Franca, Mississippi State University

Assistant Research Professor

Department of Sustainable Bioproducts

Mississippi State University 

R. D. Seale, Mississippi State University

Warren S. Thompson Professor

Department of Sustainable Bioproducts

Mississippi State University 

Robert J. Ross, USDA Forest Products Laboratory

Supervisory Research General Engineer

USDA Forest Products Laboratory Madison

R. Shmulsky, Mississippi State University

Warren S. Thompson Professor and Department Head

Department of Sustainable Bioproducts

Mississippi State University 

References

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Senalik CA (2013) Detection and assessment of wood decay–glulam beams and wooden utility poles. PhD dissertation, University of Illinois, Urbana-Champaign, IL. 232 pp.

Senalik CA, Schueneman G, Ross RJ (2014) Ultrasonic- based nondestructive evaluation methods for wood: A primer and historical review. General Technical Report FPL-GTR-235. U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, WI. 36 pp.

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Published

2020-10-28

Issue

Vol. 52 No. 4 (2020)

Section

Research Contributions

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