Path (un)predictability of two interacting cracks in polycarbonate sheets using Digital Image Correlation

Juha Koivisto*, M. J. Dalbe, M. J. Alava, S. Santucci

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

7 Sitaatiot (Scopus)
167 Lataukset (Pure)

Abstrakti

Crack propagation is tracked here with Digital Image Correlation analysis in the test case of two cracks propagating in opposite directions in polycarbonate, a material with high ductility and a large Fracture Process Zone (FPZ). Depending on the initial distances between the two crack tips, one may observe different complex crack paths with in particular a regime where the two cracks repel each other prior to being attracted. We show by strain field analysis how this can be understood according to the principle of local symmetry: the propagation is to the direction where the local shear - mode KII in fracture mechanics language - is zero. Thus the interactions exhibited by the cracks arise from symmetry, from the initial geometry, and from the material properties which induce the FPZ. This complexity makes any long-range prediction of the path(s) impossible.

AlkuperäiskieliEnglanti
Artikkeli32278
Sivut1-8
JulkaisuScientific Reports
Vuosikerta6
DOI - pysyväislinkit
TilaJulkaistu - 31 elokuuta 2016
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

Sormenjälki Sukella tutkimusaiheisiin 'Path (un)predictability of two interacting cracks in polycarbonate sheets using Digital Image Correlation'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.

Siteeraa tätä