Acoustic emission generated by granular soil−steel structure interaction

Flexural monitoring of carbon fiber/epoxy composite by acoustic emission

Carbon / epoxy composite is one of the most useful polymer matrix composites that has special properties such as high strength-to-weight ratio, high hardness, high corrosion resistance, Resistance to nuclear radiation has high consumption in different industries such as aerospace industry. Therefor monitoring of loading of this type of composite is important. In order to determine failure mecha...

SEISMIC BEHAVIOR OF SILOS WITH DIFFERENT HEIGHT TO DIAMETER RATIOS CONSIDERING GRANULAR MATERIAL-STRUCTURE INTERACTION

Silos are structures that are used for storing different types of granular material. Dynamic behavior of silos under seismic loads is very complex. In this paper seismic behavior of steel silos with different height to diameter ratios is investigated by considering granular material-structure interaction using ABAQUS finite element package. Silo wall is modeled by shell elements and its behavio...

Stress transmission in compressed granular materials evaluated by acoustic emission techniques

The evolution of effective force chains percolating through a granular system under uniaxial compression can be investigated using the acoustic emission technique to obtain a better understanding of the global behaviour of granular media in terms of microscopic phenomena which occur at the level of discrete particles. It is known from praxis as well as from the theory that percolation effects a...

Mathematical model and regression analysis of acoustic emission signals generated by partial discharges

An improved mathematical model describing acoustic emission (AE) signals generated by different types of partial discharges (PD) that occur in electric power transformer insulation system is presented in the paper. AE signals are analyzed within the AE method as applied for power transformer failure detection due to occurrence of PD. There are several types of basic defects, which are character...

The wavelet analysis the acoustic emission signals generated by multi-source partial discharges