Numerical modelling in non linear fracture mechanics
Some numerical studies of crack propagation are based on using constitutive models that accountfor damage evolution in the material. When a critical damage value has been reached in a materialpoint, it is natural to assume that this point has no more carrying capacity, as is done numerically in the...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2007-07-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero1/numero_1_art_3.pdf |
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| _version_ | 1841563037259005952 |
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| author | Viggo Tvergaard |
| author_facet | Viggo Tvergaard |
| author_sort | Viggo Tvergaard |
| collection | DOAJ |
| description | Some numerical studies of crack propagation are based on using constitutive models that accountfor damage evolution in the material. When a critical damage value has been reached in a materialpoint, it is natural to assume that this point has no more carrying capacity, as is done numerically in the elementvanish technique. In the present review this procedure is illustrated for micromechanically based materialmodels, such as a ductile failure model that accounts for the nucleation and growth of voids to coalescence, and a model for intergranular creep failure with diffusive growth of grain boundary cavities leading to micro-crack formation. The procedure is also illustrated for low cycle fatigue, based on continuum damage mechanics. In addition, the possibility of crack growth predictions for elastic-plastic solids using cohesive zone models to represent the fracture process is discussed. |
| format | Article |
| id | doaj-art-f916f249a656495a968fc544ae0f4243 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2007-07-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-f916f249a656495a968fc544ae0f42432025-01-03T00:27:28ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932007-07-01112528Numerical modelling in non linear fracture mechanicsViggo TvergaardSome numerical studies of crack propagation are based on using constitutive models that accountfor damage evolution in the material. When a critical damage value has been reached in a materialpoint, it is natural to assume that this point has no more carrying capacity, as is done numerically in the elementvanish technique. In the present review this procedure is illustrated for micromechanically based materialmodels, such as a ductile failure model that accounts for the nucleation and growth of voids to coalescence, and a model for intergranular creep failure with diffusive growth of grain boundary cavities leading to micro-crack formation. The procedure is also illustrated for low cycle fatigue, based on continuum damage mechanics. In addition, the possibility of crack growth predictions for elastic-plastic solids using cohesive zone models to represent the fracture process is discussed.http://www.gruppofrattura.it/pdf/rivista/numero1/numero_1_art_3.pdfDamage evolutionCrack growthCoesive zone |
| spellingShingle | Viggo Tvergaard Numerical modelling in non linear fracture mechanics Fracture and Structural Integrity Damage evolution Crack growth Coesive zone |
| title | Numerical modelling in non linear fracture mechanics |
| title_full | Numerical modelling in non linear fracture mechanics |
| title_fullStr | Numerical modelling in non linear fracture mechanics |
| title_full_unstemmed | Numerical modelling in non linear fracture mechanics |
| title_short | Numerical modelling in non linear fracture mechanics |
| title_sort | numerical modelling in non linear fracture mechanics |
| topic | Damage evolution Crack growth Coesive zone |
| url | http://www.gruppofrattura.it/pdf/rivista/numero1/numero_1_art_3.pdf |
| work_keys_str_mv | AT viggotvergaard numericalmodellinginnonlinearfracturemechanics |