Abstract A new crack identification method that estimates the cracks in invisible locations based on surface deformation measured by digital image correlation (DIC) is developed. An inverse problem setup to estimate such from deformations. The has an ill-condition because of noise contained Our proposed regularization uses prior information and Expectation a Posteriori (EAP) estimation. Prior i...

Typically, the Electromechanical Impedance (EMI) technique does not use an analytical model for basic damage identification. However, an accurate model is necessary for getting more information about any damage. In this paper, an EMI model is presented for predicting the electromechanical impedance of a cracked beam structure quantitatively. A coupled system of a cracked Timoshenko beam with a ...

the cracked brazilian disc (cbd) specimen is widely used in order to determine mode-i/ii and mixed-mode fracture toughness of a rock medium. in this study, the stress intensity factor (sif) on the crack-tip in this specimen is calculated for various geometrical crack conditions using the extended-finite element method (x-fem). this method is based upon the finite element method (fem). in this m...

the prevalent method of irrigation in paddy fields in iran is continuous ponding, which changes to intermittent method at the time of water shortage. soil cracks are the main problem in intermittent irrigation. in this study, effects of adding rice straw on some soil physical characteristics and cracks were studied in paddy soils of the guilan province of iran. the experiment was performed as s...

After years of service, bridges could lose their expected functions. Considering the significant number and adverse inspecting environment, urgent requirement for timely efficient inspection solutions, such as computer vision techniques, have been attractive in recent years, especially those bridge components with poor accessibility. In this paper, a lightweight procedure apparent-defect detect...

Crack-free inverse opals exhibit a sharply defined threshold wettability for infiltration that has enabled their use as colourimetric indicators for liquid identification. Here we demonstrate direct and continuous photo-tuning of this wetting threshold in inverse opals whose surfaces are functionalized with a polymer doped with azobenzene chromophores.

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.