TY - JOUR
T1 - Evolution of Void Shape and Size in Creeping Solids
AU - Needleman, Alan
AU - Tvergaard, Viggo
AU - Giessen, Erik van der
N1 - Relation: http://www.rug.nl/zernike/
Rights: University of Groningen, Zernike Institute for Advanced Materials
PY - 1995
Y1 - 1995
N2 - A boundary value problem for a periodic array of initially spherical voids in a power law creeping solid is analyzed. An axisymmetric cell model relevant for simulating grain boundary void growth is used. The rate boundary value problem is solved by means of a finite element method. Void growth histories accounting for void shape changes and, within the cell model context, void interaction effects are computed for various remote stress triaxiality states. An automatic remeshing algorithm permits computations for large changes in void size and shape. The computed void growth rates are compared with predictions from available analytical formulas that neglect shape change effects.
AB - A boundary value problem for a periodic array of initially spherical voids in a power law creeping solid is analyzed. An axisymmetric cell model relevant for simulating grain boundary void growth is used. The rate boundary value problem is solved by means of a finite element method. Void growth histories accounting for void shape changes and, within the cell model context, void interaction effects are computed for various remote stress triaxiality states. An automatic remeshing algorithm permits computations for large changes in void size and shape. The computed void growth rates are compared with predictions from available analytical formulas that neglect shape change effects.
U2 - 10.1177/105678959500400203
DO - 10.1177/105678959500400203
M3 - Article
VL - 4
SP - 134
EP - 152
JO - International Journal of Damage Mechanics
JF - International Journal of Damage Mechanics
SN - 1056-7895
IS - 2
ER -