This article addresses an improvement of a classification procedure on cracked rotors through Deep learning based convolutional neural networks (CNNs). At first, rotor-bearing system is modeled by the finite element method (FEM), then throughout its start-up, related time-domain responses are calculated numerically. In following, as pre-processing stage, continuous wavelet transform (CWT) and S...

Abstract In this paper, the mechanical properties of pre-cracked high nitrogen steel specimens with different loading angles 30°, 45° and 60° were studied by using Hopkinson tension bar. The corresponding force-displacement curves under obtained. It was found that decrease pre-crack angle, proportion shear stress on in composite gradually increased, concentration appeared during process, fractu...

Recently, with the requirement of lighter weight and more safety for a design of automobile, energy absorption capability of structural materials has become important. TRIP (Transformation-induced Plasticity) steel is expected to apply to safety members because of excellent energy absorption capability and ductility. Past studies proved that such excellent characteristics in TRIP steel are domi...

ID No: 136 Abstract: Cracks are inevitable for concrete infrastructures during their service life. The presence of cracks reduces the mechanical properties and bring potential safety hazard to infrastructure. In this study, the influence of self-healing on the ECC’s (Engineered cementitious composite) tensile properties was investigated. ECC is a new kind of HPFRCC, featuring high strain capaci...

Acoustic Emission (AE) sensing technique is used as a tool for on-line monitoring of hydro-abrasive erosion (HAE) of pre-cracked multiphase materials. As reference materials, ®ve types of concrete materials were used for the experimental study. Compression tests were performed to determine the mechanical properties and the failure behavior of these materials. Erosion parameters, such as abrasiv...