The track fasteners may be damaged by fatigue and impact load during long-term subway operation, resulting in the failure of connecting components between rail plate, spacing support becomes larger, an increase its dynamic deformation, affecting vehicle’s running performance, and, severe cases, endangering safety. A vehicle-subway system model was created to study performance vehicles when fail...

The detection of fatigue cracks under installed fasteners has been a major goal of the aging aircraft NDE community. The Sliding Probe, Magneto-Optic Imager, Rotating Self-Nulling Probe, Low Frequency Eddy Current Array, and Eddyscan systems are among the instruments developed for this inspection. It has been verified that the detection of fatigue cracks under flush head aluminum and titanium f...

Deep Learning has been widely used in image-based applications such as object classification, detection, and recognition recent years. Classifying highly similar objects is a very difficult problem. It to classify datasets this situation where similarity between classes differences are high. In study, Siamese Convolution Neural Network, which measurement-based network, practiced 6 types of scre...

Abstract This article presents a numerical study on the influence of anchorage shear hysteresis seismic response nonstructural components (NSC) connected to multi-storey reinforced concrete (RC) buildings, and itself. To cover variety different types shapes, this contribution considered experimental results obtained for five post-installed anchors. The were used calibrating model connecting an ...

Fastener detection is a necessary step for computer vision (CV) based robotic disassembly and servicing applications. Deep learning (DL) provides robust approach creating CV models capable of generalizing to diverse visual environments. Such DL systems rely on tuning input resolution mini-batch size parameters fit the needs application. This paper method determining optimal compromise between d...

Brace sleeve (BS) fasteners, i.e., nut and bolt, are small components but play essential roles in fixing BS cantilever railway catenary system. They commonly inspected by onboard cameras using computer vision to ensure the safety of operation. However, most fasteners cannot be directly localized because they too inspection images. Instead, is first for detecting fastener. This leads a new probl...

Aging aircraft may develop multiple-site damage (MSD) that can reduce the structural integrity of fuselage structures. The existence of small cracks emanating from adjacent rivet holes in a fuselage lap-splice joint is of major concern. Small collinear cracks greatly reduce the residual strength of a panel with a lead crack. Recent studies predicting the residual strength of flat and curvilinea...