TY - JOUR
T1 - Determination of the Elastic Constants of Thermally Modified Beech by Ultrasound and Static Tests Coupled with 3D Digital Image Correlation
AU - Luis Gómez-Royuela, José
AU - Majano-Majano, Almudena
AU - José Lara-Bocanegra, Antonio
AU - Reynolds, Thomas P.S.
N1 - Funding Information:
Part of the work was undertaken during a short-term scientific stay by the second and third authors at the School of Engineering (University of Edinburgh) in 2019, with the financial support of “Programa Propio de I + D + i 2019 de la Universidad Politécnica de Madrid”. The authors would like to thank PEMADE Laboratory for ultrasound testing, and Dr. Raquel Gonçalves and Mr. Carlos Vázquez for their support with ultrasound analysis. The wood material was acquired within the IP-SME project HOLIWOOD (Holistic implementation of European thermal treated hard wood in the sector of construction industry and noise protection by sustainable, knowledge-based and value added products). This project was carried out with financial support from the European Community within the Sixth Framework Program ( NMP2-CT-2005-IP 011799-2 ).
Funding Information:
Part of the work was undertaken during a short-term scientific stay by the second and third authors at the School of Engineering (University of Edinburgh) in 2019, with the financial support of ?Programa Propio de I + D + i 2019 de la Universidad Polit?cnica de Madrid?. The authors would like to thank PEMADE Laboratory for ultrasound testing, and Dr. Raquel Gon?alves and Mr. Carlos V?zquez for their support with ultrasound analysis. The wood material was acquired within the IP-SME project HOLIWOOD (Holistic implementation of European thermal treated hard wood in the sector of construction industry and noise protection by sustainable, knowledge-based and value added products). This project was carried out with financial support from the European Community within the Sixth Framework Program (NMP2-CT-2005-IP 011799-2).
Publisher Copyright:
© 2021 The Author(s)
PY - 2021/10/4
Y1 - 2021/10/4
N2 - Fagus sylvatica L. (European beech) is one of the most widespread hardwood species growing in Europe, which is currently undergoing of in-depth research for the development of engineering products to use its excellent mechanical properties. As its natural durability is low, heat treatment is investigated as a means to enhance its biological durability, as well as its dimensional stability. Reliable models with a full material description including the elastic constants are necessary for material and structural modelling and design. The aim of this work was to comprehensively characterise European beech subjected to three different intensities of heat treatments. It is described as an orthotropic material by determining all of the independent elastic constants: three Young’s moduli, three shear moduli and six Poisson’s ratios. Both static (by compression) and dynamic (by ultrasound) experimental methods were considered for comparison purposes. The compression tests were coupled with 3D digital image correlation (DIC) technique to perform optical full-field analyses of strains. Characterization of untreated beech was also carried out and compared with literature values. The usual assumption of symmetry of the compliance matrix was verified. The results confirmed that heat treatment influenced the elastic behaviour of the material. However, the impact of the treatment differed among the elastic components, with non-uniform trends with the intensity of the heat treatments.
AB - Fagus sylvatica L. (European beech) is one of the most widespread hardwood species growing in Europe, which is currently undergoing of in-depth research for the development of engineering products to use its excellent mechanical properties. As its natural durability is low, heat treatment is investigated as a means to enhance its biological durability, as well as its dimensional stability. Reliable models with a full material description including the elastic constants are necessary for material and structural modelling and design. The aim of this work was to comprehensively characterise European beech subjected to three different intensities of heat treatments. It is described as an orthotropic material by determining all of the independent elastic constants: three Young’s moduli, three shear moduli and six Poisson’s ratios. Both static (by compression) and dynamic (by ultrasound) experimental methods were considered for comparison purposes. The compression tests were coupled with 3D digital image correlation (DIC) technique to perform optical full-field analyses of strains. Characterization of untreated beech was also carried out and compared with literature values. The usual assumption of symmetry of the compliance matrix was verified. The results confirmed that heat treatment influenced the elastic behaviour of the material. However, the impact of the treatment differed among the elastic components, with non-uniform trends with the intensity of the heat treatments.
KW - Beech
KW - Thermally modified timber
KW - Heat treatment
KW - Elastic constants
KW - Orthotropy
KW - ultrasound
KW - Compression
KW - DIC
UR - http://www.scopus.com/inward/record.url?scp=85111322699&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2021.124270
DO - 10.1016/j.conbuildmat.2021.124270
M3 - Article
AN - SCOPUS:85111322699
SN - 0950-0618
VL - 302
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 124270
ER -