Multiscale ductile fracture integrating tomographic characterization and 3-D simulation

Fully plastic structures are desirable to help detect impending failure. For stability, the displacement per unit drop in load due to any crack growth must be less than the compliance of the surrounding structure. The corresponding crack growth ductility is less with asymmetric configurations, than with the symmetric ones usually studied. Examples are given of face-grooved plates with unequal flank angles, staggered cracks, and single cracks near welds in joints under tension or bending. Further examples are the tendency of cracks on a microscopic scale to become rough, to zig-zag, or even to spiral (in round bars).

Reduced crack growth ductility due to asymmetric configurations

Microstructural simulation of adiabatic shear band formation in AISI 4340 steel using Voronoi Tessellation

Thesis. 1975. Ph.D.--Massachusetts Institute of Technology. Dept. of Materials Science and Engineering.

James Albert

Papers

Correlation of fractography, microstructure and fracture toughness behavior of high strength alloys.