An approximate, analytical approach to the 'HRR' solution for sharp V notches
Flippi, S., Ciavarella, M. and Lazzarin, P. (2002) An approximate, analytical approach to the 'HRR' solution for sharp V notches. International Journal of Fracture, 117, (3), 269-286. (doi:10.1023/A:1022057621185).
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The well-known so-called `HRR-solution' (Hutchinson, 1968 and Rice and Rosengren, 1968) considers the elasto-plastic stress field in a power-law strain hardening material near a sharp crack. It provides a closed form explicit expression for the stress singularity as a function of the power-law exponent `n' of the material, but the stress angular variation functions are not found in closed form. More recently, similar formulations have appeared in the literature for sharp V-notches under mode I and II loading conditions. In such cases not only is the angular variation of the stress fields obtained numerically, but so is the singularity exponent of the stress field. In the present paper, approximate but accurate closed form solutions are first reported for sharp V-notches with an included angle greater than /6 radians. Such solutions, limited here to Mode I loading conditions, allow a very satisfactory estimate of the angular stress components in the neighbourhood of the notch tip, in the entire range of notch angles and for the most significant values of n (i.e. from 1 to 15). When the notch opening angle tends towards zero, and the notch approaches the crack case, the solution becomes much more complex and a precise evaluation of the parameters involved requires a best-fitting procedure which, however, can be carried out in an automatic way. This solution is also reported in the paper and its degree of accuracy is discussed in detail.
|Keywords:||hrr solution, v-notch, elastoplastic stress distributions|
|Subjects:||T Technology > TJ Mechanical engineering and machinery
Q Science > QA Mathematics
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences
|Date Deposited:||27 Mar 2006|
|Last Modified:||28 Jun 2012 09:59|
|Contributors:||Flippi, S. (Author)
Ciavarella, M. (Author)
Lazzarin, P. (Author)
|Contact Email Address:||email@example.com|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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