Pinning of cracks in two-dimensional disordered media

Autor:	L. I. Salminen, Kaarlo Niskanen, E. T. Seppälä, Jari Rosti, Mikko J. Alava
Rok vydání:	2001
Předmět:	Materials science Condensed matter physics Fissure Fracture mechanics Surface finish Plasticity Condensed Matter Physics Electronic Optical and Magnetic Materials medicine.anatomical_structure Brittleness medicine Ductility Pinning force Tensile testing
Zdroj:	The European Physical Journal B. 19:259-263
ISSN:	1434-6028
DOI:	10.1007/s100510170334
Popis:	We study the statistics of crack pinning in two dimensions by experiments and simulations of directed polymers in random media. Mode I tensile tests on paper samples show a delocalization phenomenon as the notch length is varied if the fraction of cracks pinned to the notch is monitored. This is compared with the behavior of directed polymers in the presence of both an energetically favorable localized pinning center and bulk disorder. An analysis of the crack interface roughness indicates self-affine behavior with a roughness exponent ζ in the proximity of the minimum energy surface value 2/3.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b0e0681398c38733cb399291903794fb https://doi.org/10.1007/s100510170334 Zobrazit plný text záznamu Full text from SpringerLink