The effect of thickness on out-of-plane constraint in terms of the T-stress
The plastic zone is theoretically and numerically analyzed for various combinations of the nonsingular terms xx T to zz T ratios in connection with specimen thickness under mode I loading. The plastic zone size distribution is based on the Mises yield criterion for mode I conditions and mapped in th...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Gruppo Italiano Frattura
2014-09-01
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| Series: | Fracture and Structural Integrity |
| Subjects: | |
| Online Access: | https://www.fracturae.com/index.php/fis/article/view/1288 |
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| Summary: | The plastic zone is theoretically and numerically analyzed for various combinations of the nonsingular
terms xx T to zz T ratios in connection with specimen thickness under mode I loading. The plastic zone
size distribution is based on the Mises yield criterion for mode I conditions and mapped in the specimen
thickness direction. It is shown that the plastic zone size is affected by the zz T -stress, i.e. there is strong effect
of out-of-plane constraint (thickness) on crack tip plastic zones.
In addition, to study the effect of thickness and loading mode mixity (mode I and II) of the specimen on the
singular (KI, KII) and the non-singular ( xx T , zz T ) terms along the 3D crack front, three-dimensional stress fields are analyzed by means of finite element analysis. The strong effect of thickness and mixed mode loading
conditions on the zz T -stress is observed. At the same time, there is not the effect of thickness on the nonsingular xx T -stress at the same loading conditions. |
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| ISSN: | 1971-8993 |