ISSN:
1013-9826
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
Under the action of compressive load, the growth and coalescence containing flaws inbrittle materials (rock and rocklike materials e.g.) will result in the local buckling and globalfracture of rockmass. But, the mechanisms on propagation and coalescence of 3-dimensionalinternal flaws are not clear till now. We examine brittle fractures of manmade specimens usingfrozen casting resin and rocklike material to observe 3D internal flaws growth process at about -30°C. A team of specimens containing three internal flaws is measured; flaws are made of threeparallel oblong aluminum films. The propagation and coalescence pattern of three internal flaws isobserved under compressive stress. An interesting phenomenon is that the crack initiated from thesecond flaw quickly turns to the one induced from the third flaw and forms a bigger fracture plane,then splits the specimen. It shows that the flaw distribution pattern will greatly affect the flawsgrowth and coalescence process. The mechanisms that lead to the wing and anti-wing crackinitiation and coalescence are described
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.739.pdf
