Research on Dynamic and Static Test Methods for Evaluating the Poisson's Ratio of Oriented Strand Board

In this article, dynamic method and static method of testing Poisson's ratio of OSB (Oriented Strand Board) were proposed. Through modal and static numerical analyses, the position where the transverse stress is equal to zero was determined. The binary linear regression method was applied to express the gluing position of the strain gauge as a relational expression that depended on the length-width ratio and width-thickness ratio of the cantilever plate. Then the longitudinal and transverse Poisson's ratios of OSB were measured by the given dynamic and static methods. In addition, the test results of OSB Poisson's ratio were analyzed with the probability distribution of random variables. The results showed that using the proposed dynamic method and static method, the test results for longitudinal and transverse Poisson's ratios of OSB were quite consistent, despite the gluing position of the strain gauges being different. And these OSB Poisson's ratios were accorded with that obtained by the axial tensile method and the four-point bending method. OSB longitudinal and transverse Poisson's ratios followed Weibull distribution.