Challenges in continuum modeling of intergranular fracture

Details Challenges in continuum modeling of intergranular fracture Challenges in continuum modeling of intergranular fracture

2006-12-13

arxiv.org/abs/cond-mat/0612309v3

Physics

Condensed Matter

Other Condensed Matter

4 pages, 6 figures, changed content

Scientific paper

Intergranular 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.

Affiliated with

Also associated with

No associations

Rating

Challenges in continuum modeling of intergranular fracture does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Challenges in continuum modeling of intergranular fracture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Challenges in continuum modeling of intergranular fracture will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-585208