Application of the method of caustics to the experimental determination of the Poisson ratio
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Ioakimidis, Nikolaos
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Abstract
The classical optical method of caustics is used for the direct experimental determination of the Poisson ratio of an isotropic elastic material. Only one simple tension experiment and the measurement of two diameters of caustics are required. The numerical values of all other constants in the experimental set-up are not required. This method is applicable both for reflected and for transmitted caustics. The case of the experimental determination of the modulus of elasticity (by a generalization of the above method) is also described in brief. Several additional possibilities are also reported.
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Keywords
Plane isotropic elasticity, Poisson's ratio, Modulus of elasticity, Elastic constants, Optical methods, Caustics, Reflected caustics, Transmitted caustics, Experimental set-up, Circular holes, Circular inclusions