Medición del módulo de Young en metales mediante la técnica de excitación por impulso

AUTOR(ES)

Tognana, Sebastián, Montecinos, Susana, Salgueiro, Walter

FONTE

Matéria (Rio J.)

DATA DE PUBLICAÇÃO

19/07/2018

RESUMO

ABSTRACT The impulse excitation, as non-destructive technique, allows to determine the elastic constants of materials by means of measurement of natural frequency of vibration of bars in different modes, excited by an impact in a point. In this work, the Young’s modulus of copper, aluminum and copper-based alloys samples was determined. The measurements were performed using different vibration modes: flexural in supported bars, and longitudinal. As a first step, the Young´s modulus of a sample was determined using different modes, finding consistency in results. On the other hand, the variation of the Young´s modulus was determined as a function of the temperature and microstructural parameters such as grain size. The capabilities and disadvantages of using the impulse excitation technique as a low-cost alternative in the field of research in metals and alloys are analyzed.

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