Abstract In this paper, a potential crack region method is proposed to detect road pavement cracks by using the adaptive threshold. To reduce noises of image, pre-treatment algorithm was applied according following steps: grayscale processing, histogram equalization, filtering traffic lane. From image segmentation methods, combines global threshold and local segment image. According distributio...

CRACK IDENTIFICATION ON A BEAM BY VIBRATION MEASUREMENT AND WAVELET ANALYSIS D.SRINIVASARAO, DR.K.MALLIKARJUNA RAO, DR.G.V.RAJU 1 Asst.Professor, Dept. of Mechanical Engineering, DMSSVH College of Engineering Machillipatnam, Krishna Dt. A.P., India 2 Professor, Dept. of Mechanical Engineering, JNTU, Kakinada, A.P., India 3 Professor, Dept. of Mechanical Engineering, SRKR Engineering College, Bh...

Recent developments in fracture dynamics include the discovery of elastic waves which propagate along moving crack fronts in three-dimensional solids, and the identification of possible sources of the roughening and low terminal speeds of tensile cracks in brittle amorphous solids. Those topics are discussed briefly here.

in this paper, the solution of a moving volterra-type screw dislocation in an orthotropic layer, bonded between two piezoelectric layers is obtained using complex fourier transform. the dislocation solution is then employed as strain nuclei to derive singular integral equations for a medium weakened by multiple moving cracks. these equations, which are classified as, cauchy singular equations, ...

A FGM layer sandwiched between two isotropic layers weakened by several interface cracks under antiplane loading is studied. This paper examines the modelling of cracks by distribution of strain nuclei along crack lines. In this investigation, the Volterra-type screw dislocation employed between FGM and an elastic layer. To solve the dislocation problem, the complex Fourier transform is applied...

A FGM layer sandwiched between two isotropic layers weakened by several interface cracks under antiplane loading is studied. This paper examines the modelling of cracks by distribution of strain nuclei along crack lines. In this investigation, the Volterra-type screw dislocation employed between FGM and an elastic layer. To solve the dislocation problem, the complex Fourier transform is applied...

This study aims at determining the critical seismic intensity at which cracks are expected to develop in a concrete arch dam. This intensity is referred to as crack initiation intensity. The crack initiation intensity measure implies that earthquakes with the intensity measure higher than this value are expected to induce cracks in the arch dam. This quantity is an indicator for seismic evaluat...

A software tool for automated crack onset and growth simulations based on the eXtended Finite Element Method (X-FEM) has been developed. For the first time, this tool is able to simulate arbitrary crack growth and composite delamination without remeshing. The automated tool is integrated with Abaqus/Standard and Abaqus/CAE via the customization interfaces. It seamlessly works with the Commercia...