Abstract
General expressions for effective Young's modulus of quasilayered specimens were derived for model situations corresponding to statical tensile tests and dynamical resonant tests. These expressions enable us to evaluate the effective-modulus values which would be measured if the quasilayered specimens were undergone tensile tests and dynamical resonant tests. General expressions for effective Young's modulus based on sample responses (elongation, vibration) occuring in the plane of quasilayers, are equal for the both testing-method sets. On the other hand, general expressions as well as most of particular values for the effective Young's modulus, based on the sample responses perpendicular to quasilayers, differ from each other and from those for "in plane" modulus. So, for a design use, the modulus value determined by means of the method compatible with the application intended should be chosen.

Key words
effective Young's modulus, quasilayered specimens, tensile tests, dynamical resonant method

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