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A comparison of Gent-Schultz law with cohesive models of viscoelastic subcritical crack propagation

Mike Ciavarella's picture

dear colleagues     I have written some general comments about viscoelastic models which may you find useful, mixing results from Wang Thouless Barber vs Schapery vs de Gennes Persson, etc. I conclude that Gent-Schultz is the most practical and solid approach, despite it seems empirical and too simple.  It corresponds very closely to work with Schapery model, and the finite size effects in Persson's theory are quite suspicious if not completely wrong (besides, there are two Persson's theory, one in contradiction to the other), as demonstrated by theory and actual Finite Element simulations of Wang Thouless and Barber.  However, I may be wrong, and here is the preprint of the paper I just submitted, so any comment is welcome. 

https://www.researchgate.net/publication/350325255_A_comparison_of_Gent-Schultz_law_with_cohesive_models_of_viscoelastic_subcritical_crack_propagation

 

 

Regards, Mike

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