Fracture

Fracture can be studied by almost any of the microscopic techniques. Below are shown a variety of techniques, including some work on imaging three-dimension maps of fracture surfaces.

BEIof 0.5 w/c mortar with silica sand grains, with Wood’s metal intruded into tensile crack showing branching. (Field width 2 mm, x50) [BEI by Anne Abell and David A. Lange, UIUC]

BEI of interface crack between mortar and clay brick. The crack was separated and filled with epoxy before sectioning/polishing. (Field width 2.5 mm, x40) [BEI by H. Dale DeFord and David Lange, UIUC]

$BEI of interface crack in another fractured masonry unit that shows how the crack can propagate into the clay brick. The fracture path shown here is passing through the edge of the clay masonry unit, and the mortar appears only at the very top section of the image. (Field width 2.5 mm, x40) [BEIby H. Dale DeFord and David Lange, UIUC]$

BEI of interface crack in another fractured masonry unit that shows how the crack can propagate into the clay brick. The fracture path shown here is passing through the edge of the clay masonry unit, and the mortar appears only at the very top section of the image. (Field width 2.5 mm, x40) [BEIby H. Dale DeFord and David Lange, UIUC]

$Color MATLAB isometric fracture surface image of 0.5 w/c mortar with silica sand obtained from 3D stereo pair analysis. (2 x 3 mm size) [Image by Anne Abell and David A. Lange, UIUC]$

Color MATLAB isometric fracture surface image of 0.5 w/c mortar with silica sand obtained from 3D stereo pair analysis. (2 x 3 mm size) [Image by Anne Abell and David A. Lange, UIUC]

$Comparison of SEI fracture surface images to 3D techniques. (Scales on image) [Image by Anne Abell and David A. Lange, UIUC]$

Comparison of SEI fracture surface images to 3D techniques. (Scales on image) [Image by Anne Abell and David A. Lange, UIUC]

$SEM stereo pair image of 0.5 w/c mortar with silica sand used to generate fracture surface range image. (Field width of each is 2.3 mm, x50) [Anne Abell and David A. Lange, UIUC]$

SEM stereo pair image of 0.5 w/c mortar with silica sand used to generate fracture surface range image. (Field width of each is 2.3 mm, x50) [Anne Abell and David A. Lange, UIUC]