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    Volume 47, Issue 4 (July 2019)

    Dynamic Testing and Analysis of Poisson’s Ratio of Lumbers Based on the Cantilever-Plate Bending Mode Shape Method

    (Received 12 October 2016; accepted 18 December 2017)

    Published Online: 2018

    CODEN: JTEVAB

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    Abstract

    In this work, a method for dynamic testing of Poisson’s ratio of dimension lumber was proposed, based on the strain oscillation curve of first-order bending vibration of a cantilever plate. The method is efficient and convenient with good repeatability and high accuracy. Poisson’s ratios along grain and across grain (μ, L, R, , , , , , and μ, R, L, , , , , , , respectively) on radial sections (LR section) and across grain (μ, R, T, , , , , , ) on transverse sections of Sitka Spruce specimens were measured. The results show that the Poisson’s ratio along grain on the LR section μ, L, R, , , , , , is one order higher than that across grain on the LR section μ, R, L, , , , , , . Additionally, the accuracy of the elastic modulus of cantilever plate specimens calculated by theoretical equations of cantilever beam was analyzed. For cantilever plate of Sitka Spruce with an aspect ratio of four, the error of elastic modulus calculated with the cantilever formula is 0.7 %.

    Author Information:

    Cao, Yu
    College of Material Science and Technology, Nanjing Forestry University, Nanjing,

    Li, Minmin
    College of Material Science and Technology, Nanjing Forestry University, Nanjing,

    Wang, Zheng
    College of Material Science and Technology, Nanjing Forestry University, Nanjing,

    Wang, Yunlu
    College of Material Science and Technology, Nanjing Forestry University, Nanjing,

    Gao, Zizhen
    College of Material Science and Technology, Nanjing Forestry University, Nanjing,


    Stock #: JTE20160521

    ISSN:0090-3973

    DOI: 10.1520/JTE20160521

    Author
    Title Dynamic Testing and Analysis of Poisson’s Ratio of Lumbers Based on the Cantilever-Plate Bending Mode Shape Method
    Symposium ,
    Committee D07