Cyclic crack growth in elastic plastic solids : a description in terms of dislocation theory

Whenever the plastic deformation is in the order of some Burgers vectors, it appears to be reasonable to describe crack tip plasticity by means of “mathematical” dislocations. A discrete dislocation model is presented for the simulation of mode I fatigue crack propagation. In order to take into acco...

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Veröffentlicht in:	Computational mechanics 1997-07, Vol.20 (1-2), p.139-144
Hauptverfasser:	RIEMELMOSER, F. O, PIPPAN, R, KOLEDNIK, O
Format:	Artikel
Sprache:	eng
Schlagworte:	Computer simulation Condensed matter: structure, mechanical and thermal properties Crack closure Crack propagation Crack tips Dislocation models Exact sciences and technology Fatigue failure Fatigue, brittleness, fracture, and cracks Fracture mechanics Fracture mechanics (crack, fatigue, damage...) Fracture mechanics, fatigue and cracks Fundamental areas of phenomenology (including applications) Mathematical analysis Mechanical and acoustical properties of condensed matter Mechanical properties of solids Physics Plastic deformation Propagation modes Solid mechanics Structural and continuum mechanics Vectors (mathematics)
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Beschreibung
Zusammenfassung:	Whenever the plastic deformation is in the order of some Burgers vectors, it appears to be reasonable to describe crack tip plasticity by means of “mathematical” dislocations. A discrete dislocation model is presented for the simulation of mode I fatigue crack propagation. In order to take into account the crack face contact behind the crack tip a procedure was developed which enables the computation of the dislocation motion even when crack closure occurs.
ISSN:	0178-7675 1432-0924
DOI:	10.1007/s004660050230