Critical applied stresses for a crack initiation from a sharp V-notch
The aim of the paper is to estimate a value of the critical applied stress for a crack initiation from a sharp V-notch tip. The classical approach of the linear elastic fracture mechanics (LELM) was generalized, because the stress singularity exponent differs from 0.5 in the studied case. The valu...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2014-10-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero30/numero_30_art_8.pdf |
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| author | L. Náhlík P. Hutař K. Štegnerová |
| author_facet | L. Náhlík P. Hutař K. Štegnerová |
| author_sort | L. Náhlík |
| collection | DOAJ |
| description | The aim of the paper is to estimate a value of the critical applied stress for a crack initiation from a
sharp V-notch tip. The classical approach of the linear elastic fracture mechanics (LELM) was generalized,
because the stress singularity exponent differs from 0.5 in the studied case. The value of the stress singularity
exponent depends on the V-notch opening angle. The finite element method was used for a determination of
stress distribution in the vicinity of the sharp V-notch tip and for the estimation of the generalized stress
intensity factor depending on the V-notch opening angle. Critical value of the generalized stress intensity factor
was obtained using stability criteria based on the opening stress component averaged over a critical distance d
from the V-notch tip and generalized strain energy density factor. Calculated values of the critical applied
stresses were compared with experimental data from the literature and applicability of the LEFM concept is
discussed. |
| format | Article |
| id | doaj-art-1bdd3cf4cd1c4516a23bcc8d8fecc7b7 |
| institution | Kabale University |
| issn | 1971-8993 1971-8993 |
| language | English |
| publishDate | 2014-10-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-1bdd3cf4cd1c4516a23bcc8d8fecc7b72025-01-03T00:38:49ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89931971-89932014-10-01830556110.3221/IGF-ESIS.30.08 Critical applied stresses for a crack initiation from a sharp V-notchL. Náhlík 0P. Hutař 1K. Štegnerová 2Institute of Physics of Materials, Academy of Sciences of the Czech Republic Institute of Physics of Materials, Academy of Sciences of the Czech Republic Institute of Physics of Materials, Academy of Sciences of the Czech Republic The aim of the paper is to estimate a value of the critical applied stress for a crack initiation from a sharp V-notch tip. The classical approach of the linear elastic fracture mechanics (LELM) was generalized, because the stress singularity exponent differs from 0.5 in the studied case. The value of the stress singularity exponent depends on the V-notch opening angle. The finite element method was used for a determination of stress distribution in the vicinity of the sharp V-notch tip and for the estimation of the generalized stress intensity factor depending on the V-notch opening angle. Critical value of the generalized stress intensity factor was obtained using stability criteria based on the opening stress component averaged over a critical distance d from the V-notch tip and generalized strain energy density factor. Calculated values of the critical applied stresses were compared with experimental data from the literature and applicability of the LEFM concept is discussed.http://www.gruppofrattura.it/pdf/rivista/numero30/numero_30_art_8.pdfCrack initiationV-notch;critical stressstrain energy density factorgeneralized linear elastic fracture mechanicsfracture criteria |
| spellingShingle | L. Náhlík P. Hutař K. Štegnerová Critical applied stresses for a crack initiation from a sharp V-notch Fracture and Structural Integrity Crack initiation V-notch; critical stress strain energy density factor generalized linear elastic fracture mechanics fracture criteria |
| title | Critical applied stresses for a crack initiation from a sharp V-notch |
| title_full | Critical applied stresses for a crack initiation from a sharp V-notch |
| title_fullStr | Critical applied stresses for a crack initiation from a sharp V-notch |
| title_full_unstemmed | Critical applied stresses for a crack initiation from a sharp V-notch |
| title_short | Critical applied stresses for a crack initiation from a sharp V-notch |
| title_sort | critical applied stresses for a crack initiation from a sharp v notch |
| topic | Crack initiation V-notch; critical stress strain energy density factor generalized linear elastic fracture mechanics fracture criteria |
| url | http://www.gruppofrattura.it/pdf/rivista/numero30/numero_30_art_8.pdf |
| work_keys_str_mv | AT lnahlik criticalappliedstressesforacrackinitiationfromasharpvnotch AT phutar criticalappliedstressesforacrackinitiationfromasharpvnotch AT kstegnerova criticalappliedstressesforacrackinitiationfromasharpvnotch |