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dc.contributor.author Mishuris, Gennady
dc.contributor.author Mishakin, V.
dc.contributor.author Linkov, A. M.
dc.contributor.author Alford, N.
dc.contributor.author Fradkin, L.
dc.contributor.author Dobroskok, A.
dc.date.accessioned 2009-10-26T11:57:25Z
dc.date.available 2009-10-26T11:57:25Z
dc.date.issued 2009
dc.identifier.citation Mishuris , G , Mishakin , V , Linkov , A M , Alford , N , Fradkin , L & Dobroskok , A 2009 , ' Perturbing Paths of Slow Cracks in PMMA by Local Heating ' pp. 37-47 . , 10.1007/978-1-4020-9033-2_4 en
dc.identifier.other PURE: 125353
dc.identifier.other dspace: 2160/3331
dc.identifier.uri http://hdl.handle.net/2160/3331
dc.identifier.uri http://www.springerlink.com/content/t757207230666272/ en
dc.description Fradkin, L; Mishakin, V; Alford, N; Dobroskok, A; Linkov, A; Mishuris, G. Perturbing Paths of Slow Cracks in PMMA by Local Heating. IUTAM SYMPOSIUM ON SCALING IN SOLID MECHANICS. Book Series: IUTAM Bookseries. Editor: Borodich FM. Volume: 10, 37-47 en
dc.description.abstract Real-time control of the direction of a propagating crack is little explored area of management of structural integrity. We have examined it with experiments on quasi-static (slow) cracks in PMMA (Polymethyl-Methacrylate). We have observed that in PMMA when the mean crack speeds are low (between 0.1 and 0.4 mm/s) secondary thermal sources of relatively low power (of the order of 2 W) can be used to achieve a significant crack redirection. In this interval the micro-photographs of cracks present a fishbone structure, and we argue that the side lobes arc: micro-cracks which appear inside shear bands. The respective fracture surfaces look rippled (hackled). We have observed a clear reverse correlation between the crack speed and the angle of redirection. When the mean crack speed exceeds 0.4 mm/s) and the fracture surface is mirror smooth no trajectory redirection is achieved. It appears the micro-cracks act as notches and alleviate crack redirection. Therefore, one of our conclusions is that it might be possible to use relatively weak sources to redirect fast cracks that propagate with a super-critical speed. This hypothesis is advanced because fast cracks are also known to possess a fishbone structure and hackled fracture surface. en
dc.format.extent 11 en
dc.language.iso eng
dc.relation.ispartof en
dc.title Perturbing Paths of Slow Cracks in PMMA by Local Heating en
dc.type Text en
dc.type.publicationtype Conference paper en
dc.identifier.doi http://dx.doi.org/10.1007/978-1-4020-9033-2_4
dc.contributor.institution Institute of Mathematics & Physics (ADT) en
dc.contributor.institution Mathematical Modelling of Structures, Solids and Fluids en
dc.description.status Non peer reviewed en


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