EXPERIMENTAL STUDIES OF SLOW STABLE BRITTLE CRACK-GROWTH IN POLYMETHYL-METHACRYLATE.

Theocaris, PS

dc.contributor.author	Theocaris, PS	en
dc.date.accessioned	2014-03-01T02:47:35Z
dc.date.available	2014-03-01T02:47:35Z
dc.date.issued	1984	en
dc.identifier.issn	01666010	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/33250
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0021597530&partnerID=40&md5=9ed00ae8ba47c3a35c331fd92ed82c5d	en
dc.subject.other	MATERIALS TESTING APPARATUS - Computer Applications	en
dc.subject.other	PLASTICS - Testing	en
dc.subject.other	CROSSHEAD SPEED	en
dc.subject.other	EXPERIMENTAL STUDIES	en
dc.subject.other	SLOW QUASI-STATIC LOADING	en
dc.subject.other	SLOW STABLE BRITTLE CRACK GROWTH	en
dc.subject.other	STRESS INTENSITY FACTOR	en
dc.subject.other	TWO-STEP CRACK VELOCITY	en
dc.subject.other	POLYMETHYL METHACRYLATE	en
dc.title	EXPERIMENTAL STUDIES OF SLOW STABLE BRITTLE CRACK-GROWTH IN POLYMETHYL-METHACRYLATE.	en
heal.type	conferenceItem	en
heal.publicationDate	1984	en
heal.abstract	A controlled crack growth was achieved in single edge-cracked specimens made of a high-molecular weight PMMA by regulating the crosshead speed of loading of the specimens by a computer-driven testing device. It was shown that in this area of very slow quasi-static loading of brittle plexiglas specimens under conditions of plane stress the crack initiated at some critical value of loading, characteristic of the crosshead speed and almost independent of the initial crack length. It was established that in the interval of crosshead speeds between v//s equals 0. 2 multiplied by 10 minus 6m/s and v//s equals 0. 6 multiplied by 10 minus 5m/s brittle cracks propagated always slowly with velocities of the order c equals 3 to 5 multiplied by 10 minus 2m/s. For lower or higher values of v//s than the lower or higher limits of this transition zone, fracture was typically brittle with high crack-propagation velocities. As the crosshead speed v//s was increasing beyond the stable low-velocity region, a two-step crack velocity region appeared.	en
heal.publisher	Elsevier, Amsterdam, Neth	en
heal.journalName	Materials Science Monographs	en
dc.identifier.spage	435	en
dc.identifier.epage	442	en