Open AccessEffects of adjusting dynamic e-modulus to reference values of timber moisture and temperature in classification of small number of samples
Author(s) -
Adriana Bjelanović,
Tomislav Franković,
Ivana Štimac Grandić
Publication year - 2019
Publication title -
građevinar
Language(s) - English
Resource type - Journals
eISSN - 1333-9095
pISSN - 0350-2465
DOI - 10.14256/jce.2498.2018
Subject(s) - nondestructive testing , moduli , bending , moisture , materials science , dynamic testing , structural engineering , mathematics , composite material , engineering , physics , quantum mechanics
Mathematical dependences are derived for non-destructive testing (NDT) and destructive testing (DT) of three timber sets, each with six beams made of soft and hard structural timber. Very strong correlations were established between elastic moduli (e-moduli) determined by non-destructive testing, from dynamic ultrasound testing with direct propagation and static testing to bending action, and the correlation of e-moduli with bending strengths. The effects of adjustment of NDT results to reference values of moisture and temperature, and statistical significance of regression parameters, were evaluated from the standpoint of use in the initial classification of a small number of samples.