Floresta e Ambiente
Floresta e Ambiente
Original Article Forest Products Science and Tecnology

Influence of Moisture on Physical and Mechanical Properties of Pouteria Pachycarpa Wood

Felipe Nascimento Arroyo, Iuri Fazolin Fraga, Larissa Soriani Zanini Ribeiro Soares, Vinicius Borges de Moura Aquino, Heloiza Candeia Ruthes, Fernando Júnior Resende Mascarenhas, Herisson Ferreira dos Santos, André Luis Christoforo, Francisco Antonio Rocco Lahr

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According to the Brazilian standard for wooden structures, strength and stiffness increase linearly with decreasing moisture; however, as wood is a natural, heterogeneous and anisotropic material, certain strength and stiffness properties may not be affected even by large differences in moisture. Therefore, this work aims to evaluate the reliability of the resistance and rigidity transformation equations as a function of moisture, used to correct the properties when the test was not performed at 12% moisture. Furthermore, it was checked whether the humidity affects the properties of the studied species. Of the 15 properties analyzed, 2 did not show changes when analyzed at the fiber saturation point and at 12% moisture. Additionally, the correction equations of the Brazilian standard showed errors of up to 24% in the estimation of properties at 12% moisture. Thus, the need to correct the Brazilian standard for wooden structures is evident.


Casca Grossa; ANOVA; NBR 7190


  • Almeida TH, Almeida DH, Arroyo FN, de Araujo VA, Chahud E, Branco LAMN, Pinheiro RV, Christoforo AL, Lahr FAR. Time of exposure at 60 °C service temperature: Influence on strength and modulus of elasticity in compression parallel to the grain of hardwood species. BioResources 2019; 14:207-219. https://doi.org/10.15376/biores.14.1.207-219
    » https://doi.org/https://doi.org/10.15376/biores.14.1.207-219

  • Almeida TH, Souza AM de, Martins ASM, Christoforo AL, Almeida DH de, Lahr FAR. Effect of service temperature on shear strength of Pinus wood for roof structures. Acta Sicentiarum. Technol 2018; 40:1-6. https://doi.org/10.4025/actascitechnol.v40i1.30913
    » https://doi.org/https://doi.org/10.4025/actascitechnol.v40i1.30913

  • Aquino VB de M, de Freitas, MVP, De Vasconcelos CQ, Almeida JPB, Arroyo FN, De Almeida DH, Silva, SAM, Silva DAL, Pinheiro RV, Lahr FAR, Rodrigues EFC, Christoforo AL. Physical and Mechanical Characterization of Planchonella Pachycarpa Wood Species for Use in Structural Purpose. Wood Research 2021; 66:267-276. https://doi.org/10.37763/wr.1336-4561/66.2.267276
    » https://doi.org/https://doi.org/10.37763/wr.1336-4561/66.2.267276

  • Associação Brasileira de Normas Técnicas. NBR 7190: Projeto de estruturas de madeira. Rio de Janeiro, Brazil; 1997.

  • Carvalho E da S, Souza MO de, Souza JS, Silva DP da, Santos JPA, Mendonça AVR. Tolerance to Desiccation of Diospyros inconstans Jacq. (Ebenaceae) Seeds at Different Maturity Stages. Floram 2021; 28:1-8. https://doi.org/10.1590/2179-8087-FLORAM-2020-0018
    » https://doi.org/https://doi.org/10.1590/2179-8087-FLORAM-2020-0018

  • Christoforo AL, Arroyo FN, Silva DAL, Panzera TH, Lahr FAR. Full characterization of Calycophyllum multiflorum wood specie. Engenharia Agrícola 2017; 37. https://doi.org/10.1590/1809-4430-Eng.Agric.v37n4p637-643/2017
    » https://doi.org/https://doi.org/10.1590/1809-4430-Eng.Agric.v37n4p637-643/2017

  • Couto NG, Almeida JPB, Govone JS, Christoforo AL, Lahr FAR. Relação entre a resistência ao cisalhamento e a resistência à compressão paralela às fibras de madeiras folhosas. Ambient. Construído 2020; 20:319-327. https://doi.org/10.1590/s1678-86212020000400475
    » https://doi.org/https://doi.org/10.1590/s1678-86212020000400475

  • Dias FM, Almeida TH de, Araújo VA, Panzera TH, Christoforo AL, Lahr FAR. Influence of the apparent density on the shrinkage of 43 tropical wood species. Acta Sicentiarum. Technol . 2016; 41:1-7. https://doi.org/10.4025/actascitechnol.v41i2.30947
    » https://doi.org/https://doi.org/10.4025/actascitechnol.v41i2.30947

  • Fragiacomo M, Menis A, Moss PJ, Clemente I, Buchanan AH. Numerical and experimental thermal-structural behaviour of laminated veneer lumber (LVL) exposed to fire. In 11th World Conf. Timber Eng. 2010, WCTE 2010; 4:3047-3056. https://doi.org/10.1260/2040-2317.1.3.145
    » https://doi.org/https://doi.org/10.1260/2040-2317.1.3.145

  • Lahr FAR, Arroyo FN, Rodrigues EFC, Almeida JPB, Aquino VB de M, Wolenski ARV, dos Santos HF, Ferraz ALN, Chahud E, Molina JC, Pinheiro RV, Christoforo AL. Models to estimate longitudinal compressive strength of Brazilian hardwood based on apparent density. BioResources 2021; 16:1373-1381. https://doi.org/10.15376/biores.16.1.1373-1381
    » https://doi.org/https://doi.org/10.15376/biores.16.1.1373-1381

  • Lahr FAR, Christoforo AL, Varanda LD, Chahud E, de Araújo VA, Branco LAMN. Shear and longitudinal modulus of elasticity in wood: relations based on static bending tests. Acta Sicentiarum. Technol . 2017; 39:433-437. https://doi.org/10.4025/actascitechnol.v39i4.30512
    » https://doi.org/https://doi.org/10.4025/actascitechnol.v39i4.30512

  • Lahr FAR, Chaud E, Arroyo FN, Christoforo AL, Rodrigues EFC, Almeida JPB, Aquino VBM, Santos HF. Ratio analysis between compression and shearing of 72 Brazilian wood species. Wood Research . 2021, 66(5):711-720. https://doi.org/10.37763/wr.1336-4561/66.5.711720.
    » https://doi.org/https://doi.org/10.37763/wr.1336-4561/66.5.711720

  • Matos GD, Molina JC. Resistência da madeira ao cisalhamento paralelo às fibras segundo as normas ABNT NBR 7190:1997 e ISO 13910:2005. Matéria 21(4): 1069-1079. https://doi.org/10.1590/S1517-707620160004.0098.
    » https://doi.org/https://doi.org/10.1590/S1517-707620160004.0098

  • Menis A, Fragiacomo M, Clemente I. Numerical investigation of the fire resistance of protected cross-laminated timber floor panels. Struct. Eng. Int. J. Int. Assoc. Bridg. Struct. Eng. 2012; 22:523-532. https://doi.org/10.2749/101686612X13363929517659
    » https://doi.org/https://doi.org/10.2749/101686612X13363929517659

  • Stolf DO, Bertolini M da S, Ferro FS, Christoforo AL, Lahr FAR. Influence of the Moisture Content of Some Wood Species on Toughness. Floram 2014; 21:501-508. https://doi.org/10.1590/2179-8087.067014
    » https://doi.org/https://doi.org/10.1590/2179-8087.067014

Submitted date:

Accepted date:

62c2d7a3a953955d93375642 floram Articles


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