Stress field of a disclination dipole in hcp bicrystal with imperfect interface

Enhanced ductility of nanomaterials through cooperative dislocation emission from cracks and grain boundaries

“…For instance, nanoscale grains and high density of grain boundaries (GBs) play a major role in their fracture behaviors. On one hand, as a result of high density GBs, specific deformation modes are proposed, e.g., GB sliding and migration, Coble creep, nanoscale amorphization and deformation twinning [6,[16][17][18][19][20][21][22]. These specific deformation mechanisms can not only release the high-concentrated stress, which will effectively impede the initiation of nanoscale cracks, but also retard or even prevent the propagation of formed cracks.…”

Elastic behavior of disclination dipole near nanotube with surface/interface effect

“…[20] They have been recognized as typical defects and the sources of characteristic singularities in the fields of displacement and rotation. [21][22][23] Disclinations are special physical objects that serve as carriers of violation of rotational symmetry. [24] They are found in nature and are used to describe such diverse phenomena as the arrangement of molecules in liquid crystals, [25] the deformation behaviors of metals, [26] the polarization effect and diffraction of electromagnetic waves, [27] the displacements of the Earth's crust, [28] galactic structures, [29] misorientation in heteroepitaxial diamond films, [30] etc.…”

Screw dislocations interacting with two asymmetrical interfacial cracks emanating from an elliptical hole

“…The behavior of material near a crack tip forms the basis for all fracture theories. In the literature, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] the interaction between cracks and dislocations was studied in order to build a fracture theory that describes plastic deformation based on the behavior of dislocations near the crack tip. Once dislocations are emitted, they move out of the crack tip area, leaving behind a dislocation-free zone.…”