In this paper, an experimental investigation on ultrasonic welding of polyamide composites reinforced with glass fiber has been carried out. The effect of ultrasonic welding parameters, such as welding time, air pressure, hold time and the amount of glass fiber in the composite on tensile strength of weld joints were determined using response surface methodology. This methodology was applied fo...

The paper presents the applications of glued joints in many industry branches. advantages and disadvantages as well methods detecting weld damage are presented. analysis to were divided explained. most important detection techniques X-ray method, ultrasonic Laser Ultrasound guided wave electromechanical impedance method active thermography method. limitations that may allow for proper selection...

Introduction. When studying the energy dissipation associated with internal friction in a weld, it is extremely important to choose measurement technique, since reliability and integrity of data obtained depends on it. At same time, necessary investigate change depending presence defects weld. Of variety methods for non-destructive testing joints by pressure welding, only ultrasonic currently u...

Nowadays, strong, light-weight, multi-functional, high performing products are key for achieving success in the worldwide markets. Meeting those requirements calls for enabling technologies that lead to innovative and sustainable manufacturing [1]. A joint technique is one or a combination of the available mechanical, chemical, thermal processes to create a bond between materials with a number ...

The use of ultrasonic arrays has increased dramatically within recent years due to their ability to perform multiple types of inspection and to produce images of the structure through post-processing of received signals. Phased arrays offer many advantages over conventional transducers in the inspection of materials that are inhomogeneous with spatially varying anisotropic properties. In this p...

This paper discusses a number of special ultrasonic NDE problems of particular interest to inertia and friction welds, but most of the results can be readily applied to other similar or dissimilar solid-state bonds as well. One of the major problems associated with dissimilar bonds is the "blinding" effect of the strong interface reflection caused by the inherent elastic discontinuity at the ot...

Ultrasonic signal classification in nondestructive testing is of great significance for the detection defects. The current methods have mainly utilized low-level handcrafted features based on traditional processing approaches, such as Fourier transform, wavelet transform and like, to interpret information carried by signals classification. This paper proposes an automatic method via a convoluti...

Abstract Ultrasonic welding is increasingly used in industry. In this paper, the influence of ultrasonic parameters (USW) on joint strength and quality was analysed. The properties USW joints depend many factors. work focuses technological surface welded EN Cu-ETP copper sheets with a thickness 1 mm. impact process parameters, such as time, pressure, vibration amplitude roughness lap shear meta...