Medición del módulo de Young en el hule látex usando ESPI

Abstract

It is well know that the module of elasticity or Young's module relates the stress to the strain that suffers a object, which is yielded to external loads. In this work we show the implementation of the Electronic Speckle Pattern Interferometry (ESPI) as a technique to measure deformations on a piece of latex when it is subjected to external loads. Along with the measurement of tension loads (by means of a digital dynamometer), we determine the Young's module of the object under test. The value determined by using the ESPI technique is compared with that obtained in a device designed and constructed in our laboratory (which is equivalent to a commercial testing machine). It is demonstrated the veracity of the ESPI technique applied as an interferometric extensometer.