La partizione dell'energia di deformazione nelle componenti deviatoriche e volumetriche, realizzata per materiali isotropi, diviene impraticabile in caso di anisotropia, a causa della presenza di termini di accoppiamento di componenti deviatoriche e volumetriche. Questo rende inutilizzabile la succitata partizione nell'approccio energetico all'analisi di materiali biologici, che presentano un caratteristico comportamento anisotropo. L'eventuale adozione del parametro energia globale con riferimento al materiale anisotropo pone il problema della corretta definizione del criterio di resistenza, per la qualcosa risulta necessario il contributo di prove sperimentali molto impegnative e persino, in alcuni casi, non disponibili allo stato attuale delle conoscenze. Un approccio secondo la meccanica computazionale offre una soluzione al problema posto.
The partitioning of strain energy into volumetric and deviatoric components, performed on isotropic materials, becomes unfeasible when anisotropy is present, because of terms that contain coupled volumetric and deviatoric components. This fact annuls the usefulness of such partitioning within the energetic approach to analysis of the mechanical behaviour of biological materials, due to their characteristic anisotropic properties. The adoption of a global energy parameter applicable to anisotropic materials encounters the difficulty of defining the strength criterion. Exacting experimental tests are necessary in order to obtain this knowledge and moreover, for some biological materials, experimentation is not yet carried out. However, computational mechanics can offer a valid approach to the solution of this problem.
@article{RLIN_1992_9_3_4_307_0,
author = {Arturo Natali},
title = {Considerazioni sul comportamento meccanico di materiali biologici con riguardo alla trattazione delle propriet\`a di anisotropia},
journal = {Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni},
volume = {3},
year = {1992},
pages = {307-313},
language = {it},
url = {http://dml.mathdoc.fr/item/RLIN_1992_9_3_4_307_0}
}
Natali, Arturo. Considerazioni sul comportamento meccanico di materiali biologici con riguardo alla trattazione delle proprietà di anisotropia. Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni, Tome 3 (1992) pp. 307-313. http://gdmltest.u-ga.fr/item/RLIN_1992_9_3_4_307_0/
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