Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53132#.VLXTfcnQrzE Author(s) Ezgi Günay , Emre Uludogan Affiliation(s) Mechanical Engineering Department, Engineering Faculty, Gazi University, Ankara, Turkey . ABSTRACT In this study, tubular pinewood ( Pinus sylvestris L. ) specimens are tested and shear strain measurements are performed by applying torsion in direction in the consideration of light weight aircraft engineering. The objective of this paper is to contribute and generate the nonlinear material model in terms of shear modulus presented with power functions under the consideration of nonlinear behavior of wood under torque. Strain gauge measurements are performed for the maximum shear stresses which develop on the tubular specimen, along the radial , circumferential and directions, in a point-wise manner. The data is gathered and examined for the determination of the local variations of empirical shear mod...
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