background and objective: the quality of flat breads depends in part on the textural and structural properties of breads during storage. these properties are largely affected by flour quality. this research aimed at evaluating textural and structural properties of lavash bread types during storage by different techniques, comparing these methods and determination of correlation between their re...

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...

Ultrasonic testing can be used for a nondestructive and rapid determination of material properties. In this study, twelve asphalt mixture samples four different types were fabricated in conventional property tests two ultrasonic wave tests. Physical properties such as bulk specific gravity air void content, mechanical dynamic modulus phase angle, acoustic velocity measured. Relationships betwee...

Ultrasonic phased arrays will eventually replace conventional ultrasonic methods in many nondestructive evaluation (NDE) applications. However, the transition to phased arrays is not without its pitfalls and challenges. In this report we present a summary of the advantages and limitations of phased-array ultrasonics in NDE, with specific reference to the inspection of thicksection welds. The ma...

In nondestructive testing to locate the faults we send an ultrasonic signal and measure the resulting vibration at di erent points To describe and combine the uncertainty corresponding to di er ent measurements and fuzzy estimates we used fuzzy logic As a result we get reasonably simple computa tional models which lead to as good fault detection as the known more complicated models I Nondestruc...

Sine wave packs are used in nondestructive evaluation of materials, most commonly in the form of ultrasonic waves. An example of such methods is the use of electromagnetic acoustic transducers (EMATs) in the evaluation of metallic structures. Reflected EMAT signals are often highly polluted by noise. Elimination of noise and extraction of peak amplitude are important signal processing tasks ass...

In this paper, we consider scattering by a guided wave incident obliquely on a surface breaking crack in a laminated composite plate, with a view to ultrasonic nondestructive assessment of cracks. The solution to this problem is the first step towards analyzing the general three-dimensional scattering problem. The method used for modeling is a hybrid method which combines finite element method ...

Abstract In order to solve the problems of difficult measurement, inaccurate results and serious interference diffusion attenuation in nondestructive evaluation grain size magnesium alloy components with complex profile, sound field models plane, cylindrical conical parts based on multiple Gaussian beam method are studied, mechanism ultrasonic propagation medium curved test blocks analyzed, An ...

Michael Dominic Ciocco An invariance transformation algorithm for defect characterization of ultrasonic signals for the nondestructive evaluation of concrete 2002 Dr. Shreekanth Mandayam College of Engineering Nondestructive evaluation (NDE) techniques offer cost-effective strategies for monitoring the integrity of a variety of civil infrastructure, such as natural gas and sewer pipelines, with...