Non-destructive evaluation of adhesive joints using acoustic methods

Abstract

In recent times, adhesive joints are used in numerous applications in different industrial sectors. This increment of bonded components has led to develop new methods for evaluation of the structural health of bonded joints. While NDTs have proven to be a great tool to guarantee reliability in assembled structures by welding or riveting, these methods have not been widely investigated and developed for the purpose monitoring adhesive joints [1]. Acoustical techniques (ultrasounds, acoustic emission, are irreplaceable tools for non-destructive evaluation of adhesive joints for the aerospace and automotive industries [2]. In the last decade, much progress has been made in the development and improvement of acoustical methods for the investigation of adhesively bonded structures [3,4]. These methods allow to detect voids, delamination, porosities, cracks, and poor adhesion. A non-destructive Sound Pressure Levels (SPL) evaluation and monitoring technique that have proven their effectiveness classify the size of the defect in the study of adhesive joints were used in this study. 1093/5000 En los últimos tiempos, las juntas adhesivas se utilizan en numerosas aplicaciones en diferentes sectores industriales. Este incremento de componentes unidos ha llevado a desarrollar nuevos métodos para evaluar la salud estructural de las juntas unidas. Si bien los END han demostrado ser una gran herramienta para garantizar la confiabilidad en estructuras ensambladas mediante soldadura o remachado, estos métodos no han sido ampliamente investigados y desarrollados con el propósito de monitorear juntas adhesivas [1]. Las técnicas acústicas (ultrasonidos, emisión acústica, son herramientas insustituibles para la evaluación no destructiva de las juntas adhesivas para las industrias aeroespacial y automotriz [2]. En la última década, se ha avanzado mucho en el desarrollo y la mejora de los métodos acústicos para la investigación de estructuras unidas adhesivamente [3, 4]. Estos métodos permiten detectar huecos, delaminación, porosidades, grietas y mala adhesión. En este estudio se utilizó una técnica de evaluación y monitoreo de niveles de presión sonora (SPL) no destructiva que ha demostrado su efectividad para clasificar el tamaño del defecto en el estudio de las juntas adhesivas.

In recent times, adhesive joints are used in numerous applications in different industrial sectors. This increment of bonded components has led to develop new methods for evaluation of the structural health of bonded joints. While NDTs have proven to be a great tool to guarantee reliability in assembled structures by welding or riveting, these methods have not been widely investigated and developed for the purpose monitoring adhesive joints [1]. Acoustical techniques (ultrasounds, acoustic emission, are irreplaceable tools for non-destructive evaluation of adhesive joints for the aerospace and automotive industries [2]. In the last decade, much progress has been made in the development and improvement of acoustical methods for the investigation of adhesively bonded structures [3,4]. These methods allow to detect voids, delamination, porosities, cracks, and poor adhesion. A non-destructive Sound Pressure Levels (SPL) evaluation and monitoring technique that have proven their effectiveness classify the size of the defect in the study of adhesive joints were used in this study.