Estudo para desenvolvimento de um novo conceito de extensômetros impresso.

Abstract

The process of new product development is split-up basically in five stages: identification of opportunity and concept development, planning and product specification, development and engineering process of the product, testing and evaluations, and ram-up. The testing stage allows guaranteeing that the new product is reliable and is in accordance with customer needs. In this phase, the engineering group checks if the product is conform through experimental tools. One of these tools is the sensor generally used to measure deformation known as strain gauge. Although the strain gauges have large application, the usage of very strong quicksetting adhesive to fix the strain gauge on the body can compromise the results of the measurement. A proposal to cover the problems related to the placement of the strain gauge is to print the strain gauge on the surface of the body to be analyzed though of printing method of ink that has metal nanoparticles. The printing process consists in to deposit drops of suspension extremely thin onto the surface of a flexible polymer film. As objective, this work evaluated the performance of the printed strain gauge, obtained by silver conductive ink, above surface of flexible material. Thereunto, it was described the characteristics of the conventional strain gauge and printed strain gauge, apply the strain gauge conventional and printed on the surface of an flexible polymeric material through conventional placement methods and ink-jet print methods, compare the characteristics and measurement of strain gauge conventional and printed by mechanical tests: tensile strength and flexural, and evaluate the advantage and disadvantage of the printed strain gauge. The results obtained by the new concept of strain gauge presented very satisfactory by the experimental tests.