MEASUREMENT OF DYNAMIC POISSONS RATIO AND THE FORM FACTOR FOR A CYLINDRICAL SAMPLE
A new method of determining the dynamic Poissons ratio based on measuring the dynamic strain and shear deformations of two samples manufactured of the same material is proposed.One side of the sample is glued to a vibrating table,while the other to a load mass.A rate of the vibration accelerations of the sides and their phase lag are measured.A two dimensional model of the stress and shear sample detbrmations,in which the Poissons ratio is an adjustable parameter,is developed.An algorithm based on joining the solutions for both the strain and the shear deformation in an optimal way to determine the Poissons ratio is proposed.The measurements for samples of silicone rubber Silastic (k) S2 in frequency range from 10 Hz to 3KHz and temperatures from 30 to 70℃ were performed. Based on the developed two-dimensional numerical model form factors required to correct estimated modules of elasticity and loss tangents with a corresponding one-dimentional model were obtained.The numerical calculations were carried out for static and dynamic strain and shear deformations of a cylindrical sample.Empiric analytic formulas useful for practical applications in the range of Poissons ratio at least from 0.3 to 0.495,radius-to-height ratio of the samples from 0.25 to 4.0 and the loss tangent from 0.1 to 0.5 as well as for a variety of modules of elasticity,densities and heights of the samples are proposed.
A.V.Buiko V.M.Kulik B.Seoudi H.H.Chun I.Lee
Institute of Theoretical and Applied Mechanics,Russian Academy of Sciences Novosibirsk,Russia Institute of Thermophysics,Russian Academy of Sciences,Novosibirsk,630090Russia ASERC,Pusan National University,Busan 609-735,Korea
国际会议
第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)
安徽黄山
英文
1411
2008-06-03（万方平台首次上网日期，不代表论文的发表时间）