| Autor: |
Mühlich, U., Donoso, J. R., Landes, J. D. |
| Předmět: |
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| Zdroj: |
International Journal of Fracture; Jun2005, Vol. 133 Issue 4, p371-388, 18p |
| Abstrakt: |
A new $$\cal J$$ estimation scheme based on the Common Format Equation (CFE) is laid out for Compact Tension (C(T)) specimens. In this context, the CFE constraint factor Ω*, originally given only for the two limits plane stress, and plane strain, is discussed. A nonlinear finite element analysis of the behaviour of blunt notched C(T) specimens with varying crack length was performed. The specimen thickness B has been varied from 3.125 up to 25 mm. Furthermore the special cases plane stress and plane strain have been considered. Considering a linear elastic – ideal plastic material, a limit load analysis has been performed numerically from which Ω* has been obtained as a function of the ligament-to-thickness-ratio B/ b. The $$\cal J$$-integral as a function of the load line displacement v has been determined for isotropic, nonlinear hardening material, where $${\cal J}$$ has been calculated using its definition as contour or surface integral, respectively. It is shown that if the obtained $${\cal J}(v)$$ curves are normalized according to the Common Format Methodology, all curves fall approximately into one single curve. This allows to estimate J( v) curves for C(T) specimens using the CFE. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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