Difference between revisions of "Mixed Mode Traction Law"
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== The Traction Law == | == The Traction Law == | ||
This [[Traction Laws|traction law]] implements a new coupled model for mixed-mode failure.<ref name=" | This [[Traction Laws|traction law]] implements a new coupled model for mixed-mode failure.<ref name="mixedmode"/>. In brief, [Triangular Traction Law]], [[Exponential Traction Law]], [[Cubic Traction Law]] and [[Trilinear Traction Law]] are all decoupled cohesive modes. While technically valid, the concept that damage in normal direction has no affect on tangential properties (and ''vice versa'') is likely unrealistic. The [[Coupled Traction Law]] is a published method to introduce coupling. | ||
There are separate traction laws for opening displacement (mode I) and sliding displacement (mode II). A publication is in preparation. In brief, it points out that prior mixed-mode models based on effective displacements are not valid unless cohesive laws and normal and tangential directions are scaled copies of each other. Because software like Abaqus lets you pick non-scaled version, its calculates can be invalid. | |||
== References == | |||
<references> | |||
<ref name="mixedmode">J. A. Nairn and Y. E. Aimene "A re-evaluation of mixed-mode cohesive zone modeling based on strength concepts instead of traction laws" <i>kin preparation</i> (2020).</ref> | |||
</references> | |||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 23:02, 2 January 2021
The Traction Law
This traction law implements a new coupled model for mixed-mode failure.[1]. In brief, [Triangular Traction Law]], Exponential Traction Law, Cubic Traction Law and Trilinear Traction Law are all decoupled cohesive modes. While technically valid, the concept that damage in normal direction has no affect on tangential properties (and vice versa) is likely unrealistic. The Coupled Traction Law is a published method to introduce coupling.
There are separate traction laws for opening displacement (mode I) and sliding displacement (mode II). A publication is in preparation. In brief, it points out that prior mixed-mode models based on effective displacements are not valid unless cohesive laws and normal and tangential directions are scaled copies of each other. Because software like Abaqus lets you pick non-scaled version, its calculates can be invalid.
References
- ↑ J. A. Nairn and Y. E. Aimene "A re-evaluation of mixed-mode cohesive zone modeling based on strength concepts instead of traction laws" kin preparation (2020).