Title of article :
Special rotational deformation effect on the emission of dislocations from a crack tip in deformed nanocrystalline solids
Author/Authors :
Fang، نويسنده , , Q.H. and Feng، نويسنده , , H. and Liu، نويسنده , , Y.W. and Lin، نويسنده , , S. and Zhang، نويسنده , , N.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
7
From page :
1406
To page :
1412
Abstract :
The interaction between the special rotational deformation and the crack in deformed nanocrystalline ceramics and metals is investigated by the complex variable method. We have theoretically described the effects of the disclination quadrupole produced by the special rotational deformation on the emission of lattice dislocations from the crack tip. The complex form expressions of the stress field and the force field are divided. The critical stress intensity factors for the first dislocation emission are calculated. The influence of the disclination strength, the grain size (the quadrupole arms), the location of the disclinations and the angle between the crack plane and one of the quadrupole arms, as well as the crack length on the critical stress intensity factors is discussed in detail. And the results show that, the special rotational deformation has great influence on the dislocation emission from the crack tip.
Keywords :
The complex variable method , Nanocrystalline materials , The stress intensity factor , Crack , Special rotational deformation , Dislocations
Journal title :
International Journal of Solids and Structures
Serial Year :
2012
Journal title :
International Journal of Solids and Structures
Record number :
1388913
Link To Document :
بازگشت