Micro cracks are essential indicators for fatigue and degradation. The physics of refractive crack detection is based on the scattering of x-rays at the phase bounda-ries of different materials or gaps.
Microcracks, spall and fracture in glass: A study using short pulsed ...
1998年4月1日 · This work reports our meso mechanical study of microcrack behavior, especially the process leading from microcracking to macro failure. Using laser loading with a duration on the order of nanoseconds, spallation in a cylindrical geometry was achieved in soda-lime glass at the microcrack evolution stage.
Morphology of subsurface cracks in glass-ceramics induced by …
2022年4月28日 · It revealed a diverse type of crack systems around the semispherical microcrack zone beneath the indent, including a new mode II inclined lateral crack driven by the maximum shear stress.
Microcracks, spall and fracture in glass - Semantic Scholar
1998年4月1日 · Using laser loading with a duration on the order of nanoseconds, spallation in a cylindrical geometry was achieved in soda-lime glass at the microcrack evolution stage. Laser induced shock waves were used to conduct crack initiation experiments for the first time.
(PDF) Microcracks, spall and fracture in glass: A study using …
1998年4月1日 · Using laser loading with a duration on the order of nanoseconds, spallation in a cylindrical geometry was achieved in soda-lime glass at the microcrack evolution stage. Laser induced shock...
Photoacoustic detection of microcracks induced in BK7 glass by …
2003年7月1日 · In the present work, the degradation of BK7 glass originated by multi-pulse damage by focused light inside the bulk is measured using photoacoustic detection. The degradation is determined from the amplitudes of the first photoacoustic peak signal, working at the single-pulse threshold.
Selective detection of microcracks under the surface of glass ...
2022年4月1日 · We propose a novel non-contact thermal stress-induced light-scattering method (N-SILSM) using a heating device for inspecting surfaces to detect polishing-induced microcracks. In this report, we carry out the selective detection of microcracks and tiny particles using an N-SILSM with temperature variation.
Photoacoustic detection of microcracks induced in glass by …
With this technique it is easy to determine the most appropriate laser parameters for microcrack formation in three-dimensional engraving. In resume, we have described a technique which can be used to detect degradation in glasses, in particular tests were made in BK7 glasses with a pulsed Nd:YAG laser (at 532 nm, t/spl ap/20 s).
Formation of Microcracks on the Surface of a Glass Irradiated with …
2020年10月19日 · Understanding the role of irradiation effects in the microstructural evolution of glass is critical for the prediction of changing its characteristics after prolonged exposure, for example, with surrounding cosmic plasma. Bombarding particles impart into glass energy, momentum, charge, and, in the case of ion irradiation, ions of atoms.
CN101403707B - Method for glass micro-crack detection by …
The invention provides a method used for detecting microcracks of glass by a molecule colorant, belonging to a real-time detection method in the technical field of optical cold working; the...