J-Q characterization of propagating cracks by FEM-remeshing
Computational Mechanics(2014)
摘要
An investigation is performed as to the extent J and Q calculated for successively stationary crack positions can be used to characterize the state at a growing crack in a corresponding geometry. FE models of single-edge notch bend and double-edge cracked panel specimens are used to cover a variation of constraint levels. The stress and strain fields are compared between different specimens at equal J -values and Q -values, respectively. A remeshing technique is used to enhance the efficiency of the analysis. The commercial FE-code ABAQUS is used and substantial crack growth is achieved with less computer time and better accuracy than in conventional FE analysis.
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关键词
constraint level,different specimen,fe model,propagating crack,commercial fe-code abaqus,better accuracy,conventional fe analysis,corresponding geometry,computer time,stationary crack position,substantial crack growth,j-q characterization,applied mechanics
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