Study on attenuation, modulus of elasticity and nonlinearity in thermowood using ultrasound

E. Hæggström; Anders Wallin; H. Hoffren; Tomi Hassinen; P. Viitaniemi

doi:10.1063/1.1916848

Study on attenuation, modulus of elasticity and nonlinearity in thermowood using ultrasound

E. Hæggström^*
, Anders Wallin
, H. Hoffren
, Tomi Hassinen
, P. Viitaniemi

^*Corresponding author for this work

University of Helsinki

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

Abstract

We determined ultrasonically the attenuation, modulus of elasticity (MOE), and nonlinearity parameter (B/A) of dry defect-free thermally modified wood samples ("thick" 10 × 50 × 100 mm³ and "thin" 2 × 40 × 150 mm³) of Finnish pine, Pinus Sylvestris, as a function of treatment temperature (60-240 °C, three hours in protective water steam). The samples were cut as radial-tangential (RT) planes, and as longitudinal-radial (LR) planes. Two distinct regions of change in mechanical parameters were seen: one around 140 C where both the linear and nonlinear parameters increased and one around 230 C where the mechanical parameters decreased. These treatment temperatures thus serves as candidates for quality class delimiters for these soft wood samples.

Original language	English
Title of host publication	Review of Progress in Quantitative Nondestructive Evaluation
Editors	Donald E. Thompson, Dale E. Chimenti
Place of Publication	Melville
Publisher	American Institute of Physics (AIP)
Pages	1500-1506
Volume	24A
ISBN (Print)	978-0-7354-0245-4
DOIs	https://doi.org/10.1063/1.1916848
Publication status	Published - 9 Apr 2005
MoE publication type	A4 Article in a conference publication
Event	Review of Progress in Quantitative Nondestructive Evaluation - Golden, United States Duration: 25 Jul 2004 → 30 Jul 2004

Publication series

Series	AIP Conference Proceedings
Volume	760
ISSN	0094-243X

Conference

Conference	Review of Progress in Quantitative Nondestructive Evaluation
Country/Territory	United States
City	Golden
Period	25/07/04 → 30/07/04

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10.1063/1.1916848

Cite this

Hæggström, E., Wallin, A., Hoffren, H., Hassinen, T., & Viitaniemi, P. (2005). Study on attenuation, modulus of elasticity and nonlinearity in thermowood using ultrasound. In D. E. Thompson, & D. E. Chimenti (Eds.), Review of Progress in Quantitative Nondestructive Evaluation (Vol. 24A, pp. 1500-1506). American Institute of Physics (AIP). https://doi.org/10.1063/1.1916848

Hæggström, E. ; Wallin, Anders ; Hoffren, H. et al. / Study on attenuation, modulus of elasticity and nonlinearity in thermowood using ultrasound. Review of Progress in Quantitative Nondestructive Evaluation. editor / Donald E. Thompson ; Dale E. Chimenti. Vol. 24A Melville : American Institute of Physics (AIP), 2005. pp. 1500-1506 (AIP Conference Proceedings, Vol. 760).

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abstract = "We determined ultrasonically the attenuation, modulus of elasticity (MOE), and nonlinearity parameter (B/A) of dry defect-free thermally modified wood samples ({"}thick{"} 10 {\texttimes} 50 {\texttimes} 100 mm3 and {"}thin{"} 2 {\texttimes} 40 {\texttimes} 150 mm3) of Finnish pine, Pinus Sylvestris, as a function of treatment temperature (60-240 °C, three hours in protective water steam). The samples were cut as radial-tangential (RT) planes, and as longitudinal-radial (LR) planes. Two distinct regions of change in mechanical parameters were seen: one around 140 C where both the linear and nonlinear parameters increased and one around 230 C where the mechanical parameters decreased. These treatment temperatures thus serves as candidates for quality class delimiters for these soft wood samples.",

author = "E. H{\ae}ggstr{\"o}m and Anders Wallin and H. Hoffren and Tomi Hassinen and P. Viitaniemi",

year = "2005",

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Hæggström, E, Wallin, A, Hoffren, H, Hassinen, T & Viitaniemi, P 2005, Study on attenuation, modulus of elasticity and nonlinearity in thermowood using ultrasound. in DE Thompson & DE Chimenti (eds), Review of Progress in Quantitative Nondestructive Evaluation. vol. 24A, American Institute of Physics (AIP), Melville, AIP Conference Proceedings, vol. 760, pp. 1500-1506, Review of Progress in Quantitative Nondestructive Evaluation, Golden, Colorado, United States, 25/07/04. https://doi.org/10.1063/1.1916848

Study on attenuation, modulus of elasticity and nonlinearity in thermowood using ultrasound. / Hæggström, E.; Wallin, Anders; Hoffren, H. et al.
Review of Progress in Quantitative Nondestructive Evaluation. ed. / Donald E. Thompson; Dale E. Chimenti. Vol. 24A Melville: American Institute of Physics (AIP), 2005. p. 1500-1506 (AIP Conference Proceedings, Vol. 760).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

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PY - 2005/4/9

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N2 - We determined ultrasonically the attenuation, modulus of elasticity (MOE), and nonlinearity parameter (B/A) of dry defect-free thermally modified wood samples ("thick" 10 × 50 × 100 mm3 and "thin" 2 × 40 × 150 mm3) of Finnish pine, Pinus Sylvestris, as a function of treatment temperature (60-240 °C, three hours in protective water steam). The samples were cut as radial-tangential (RT) planes, and as longitudinal-radial (LR) planes. Two distinct regions of change in mechanical parameters were seen: one around 140 C where both the linear and nonlinear parameters increased and one around 230 C where the mechanical parameters decreased. These treatment temperatures thus serves as candidates for quality class delimiters for these soft wood samples.

AB - We determined ultrasonically the attenuation, modulus of elasticity (MOE), and nonlinearity parameter (B/A) of dry defect-free thermally modified wood samples ("thick" 10 × 50 × 100 mm3 and "thin" 2 × 40 × 150 mm3) of Finnish pine, Pinus Sylvestris, as a function of treatment temperature (60-240 °C, three hours in protective water steam). The samples were cut as radial-tangential (RT) planes, and as longitudinal-radial (LR) planes. Two distinct regions of change in mechanical parameters were seen: one around 140 C where both the linear and nonlinear parameters increased and one around 230 C where the mechanical parameters decreased. These treatment temperatures thus serves as candidates for quality class delimiters for these soft wood samples.

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Hæggström E, Wallin A, Hoffren H, Hassinen T, Viitaniemi P. Study on attenuation, modulus of elasticity and nonlinearity in thermowood using ultrasound. In Thompson DE, Chimenti DE, editors, Review of Progress in Quantitative Nondestructive Evaluation. Vol. 24A. Melville: American Institute of Physics (AIP). 2005. p. 1500-1506. (AIP Conference Proceedings, Vol. 760). doi: 10.1063/1.1916848

Study on attenuation, modulus of elasticity and nonlinearity in thermowood using ultrasound

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