This paper presents the method of monitoring of cracks formation based on analysis of light impulses that appear during the cracks formation. The light impulses appear simultaneously in the ultraviolet (UV) and near-i...This paper presents the method of monitoring of cracks formation based on analysis of light impulses that appear during the cracks formation. The light impulses appear simultaneously in the ultraviolet (UV) and near-infrared (NIR) wave-length ranges. However, during the plastic deformation, where the building of micro cracks with narrow width is dominant, the light appears frequently in the UV-wavelength range. With the cracks growth the width become wide-ranging and the spectrum of light shifts to the NIR-wavelength range. This spectral shift was used to estimate the stage of cracks formation as degree of damage. The fracture of tested material can be predicted based on estimated degree of damage.展开更多
基金This work is carried out in the framework of the DFG priority program:Partikel im Kontakt-Mikromechanik,Mikroprozessdynamik und Partikelkollektive(SPP 1486).Project:AM 336/1-2.
文摘This paper presents the method of monitoring of cracks formation based on analysis of light impulses that appear during the cracks formation. The light impulses appear simultaneously in the ultraviolet (UV) and near-infrared (NIR) wave-length ranges. However, during the plastic deformation, where the building of micro cracks with narrow width is dominant, the light appears frequently in the UV-wavelength range. With the cracks growth the width become wide-ranging and the spectrum of light shifts to the NIR-wavelength range. This spectral shift was used to estimate the stage of cracks formation as degree of damage. The fracture of tested material can be predicted based on estimated degree of damage.
