Article ID Journal Published Year Pages File Type
7170003 Engineering Fracture Mechanics 2013 22 Pages PDF
Abstract
The competing effects of cell-regularity and relative density upon the toughness of Voronoi honeycombs are investigated for different loading modes using finite elements. Mode I toughness is shown to be the more sensitive to microstructural variations than mode II although both retain a strong quadratic dependence upon relative density. Crack initiation is shown to occur at up to six cells from the crack-tip in regions of high localised strain and/or high strain gradient. The inclusion of T-stress dramatically changes the location of ligament fracture and the normalised effective toughness of a lattice. Ligament fracture is predominantly due to bending.
Related Topics
Physical Sciences and Engineering Engineering Mechanical Engineering
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