An ultrafast time-resolution method based on picosecond pulsed laser for determining rock fracture toughness at multipoint during the crack propagation
Abstract:An innovative ultrafast time-resolution method based on a picosecond pulsed laser was employed to investigate the mode-I crack propagation characteristics of fractured rock. Its time resolution is as fast as the degree of 45 picoseconds. Then, a series of three-point compressive loading tests with this method were conducted on tuff semi-circular bend (SCB) specimens. Based on this method, we found that the mode-I fracture process of the tuff specimens were composed of repeated crack initiation, arrest, and re-… Show more
“…Fig. 4 Experimental system setup diagram [4] Fig. 5 Relationship between pulsed laser repetition frequency and high-speed camera frame rate [4] According to the test method described above, a time resolution of up to 45 picoseconds can be achieved, and the time resolution of the system depends only on the half-width of the ultrashort pulsed laser (FWHM).…”
“…Fig. 4 Experimental system setup diagram [4] Fig. 5 Relationship between pulsed laser repetition frequency and high-speed camera frame rate [4] According to the test method described above, a time resolution of up to 45 picoseconds can be achieved, and the time resolution of the system depends only on the half-width of the ultrashort pulsed laser (FWHM).…”
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.