Challenges in continuum modeling of intergranular fracture

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dc.creatorCoffman, Valerie R.
dc.creatorSethna, James P.
dc.creatorHeber, Gerd
dc.creatorLiu, Mu
dc.creatorIngraffea, Anthony
dc.creatorBailey, Nicholas P.
dc.creatorBarker, Erin Iesulauro
dc.date2006-12-13
dc.date2008-03-07
dc.date.accessioned2026-07-07T09:25:18Z
dc.date.available2026-07-07T09:25:18Z
dc.descriptionIntergranular fracture in polycrystals is often simulated by finite elements coupled to a cohesive-zone model for the interfaces, requiring cohesive laws for grain boundaries as a function of their geometry. We discuss three challenges in understanding intergranular fracture in polycrystals. First, 3D grain boundary geometries comprise a five dimensional space. Second, the energy and peak stress of grain boundaries have singularities for all commensurate grain boundaries, especially those with short repeat distances. Thirdly, fracture nucleation and growth depends not only upon the properties of grain boundaries, but in crucial ways on edges, corners, and triple junctions of even greater geometrical complexity. To address the first two challenges, we explore the physical underpinnings for creating functional forms to capture the heirarchical commensurability structure in the grain boundary properties. To address the last challenge, we demonstrate a method for atomistically extracting the fracture properties of geometrically complex local regions on the fly from within a finite element simulation.
dc.description4 pages, 6 figures, changed content
dc.identifierhttps://arxiv.org/abs/cond-mat/0612309
dc.identifierhttp://arxiv.org/abs/cond-mat/0612309
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/156359
dc.subjectOther Condensed Matter
dc.titleChallenges in continuum modeling of intergranular fracture
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