Results 11 to 20 of about 122,652 (304)
Sensors, 2023 This paper presents a method for measuring surface cracks based on the analysis of Rayleigh waves in the frequency domain. The Rayleigh waves were detected by a Rayleigh wave receiver array made of a piezoelectric polyvinylidene fluoride (PVDF) film and ...
Xiaotian Li +8 more
doaj +1 more source
Sensors, 2020 In this paper, a new damage feature, spectral area, was extracted to effectively detect crack location by studying the deformation mechanism of fiber Bragg grating (FBG) reflection spectra.
Yan Zhao +4 more
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Mechanical Analysis of Preventing Reflection Cracks Based on Stress Absorbing Layer
Advances in Civil Engineering, 2022 After asphalt concrete overlay, the reflection crack in the old pavement remains a great challenge. In order to overcome this problem, here, we report the effect of stress absorbing layer on the reflection crack.
Lingjie Han +3 more
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An adaptive space-time phase field formulation for dynamic fracture of brittle shells based on LR NURBS [PDF]
, 2020 We present an adaptive space-time phase field formulation for dynamic fracture of brittle shells. Their deformation is characterized by the Kirchhoff–Love thin shell theory using a curvilinear surface description.
Hughes, TJR +5 more
core +2 more sources
Simulation of Impedance Discontinuities Resulting from Degradation of Interconnections on Printed Circuit Boards [PDF]
, 2011 Numerical simulation of impedance discontinuities resulting from degradation of interconnections on printed circuit ...
Dipartimento Di Elettronica +7 more
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Non-linear enhancement of laser generated ultrasonic Rayleigh waves by cracks [PDF]
, 2008 Laser generated ultrasound has been widely used for detecting cracks, surface and sub-surface defects in many different materials. It provides a non-contact wideband excitation source which can be focused into different geometries.
Cann, B. +4 more
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Reflections in a cracked mirror [PDF]
British Journal of General Practice, 2009 How I hate the modern obsession with reflection. After every talk and lecture, at almost every trainers and appraisers meeting for the last few years and in everything associated with the medical learning industry, I am encouraged to reflect. To reflect on what I have learned and to shine that secondhand light on how my new knowledge will change the ...
openaire +2 more sources
Scanning laser source and scanning laser detection techniques for different surface crack geometries [PDF]
, 2012 Standard test samples typically contain simulated defects such as slots machined normal to the surface. However, real defects will not always propagate in this manner; for example, rolling contact fatigue on rails propagates at around 25º to the surface,
Clough, A. R. +3 more
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Non-contact ultrasonic detection of angled surface defects [PDF]
, 2011 Non-destructive testing is an important technique, and improvements are constantly needed. Surface defects in metals are not necessarily confined to orientations normal to the sample surface; however, much of the previous work investigating the ...
Clough, A. R. +3 more
core +1 more source
Sensors, 2016 This paper presents a novel framework for probabilistic crack size quantification using fiber Bragg grating (FBG) sensors. The key idea is to use a high-order extended finite element method (XFEM) together with a transfer (T)-matrix method to analyze the
Jingjing He +4 more
doaj +1 more source