Geodesic
A minimum principle in the dynamics of elastic materials with voids
Atti della Accademia nazionale dei Lincei. Rendiconti della Classe di scienze fisiche, matematiche e naturali, Série 8, Tome 83 (1989) no. 1, pp. 187-193 Cet article a éte moissonné depuis la source Biblioteca Digitale Italiana di Matematica

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In the context of the linear, dynamic problem for elastic bodies with voids, a minimum principle in terms of mechanical energy is stated. Involving a suitable (Reiss type) function in the minimizing functional, the minimum character achieved in the Laplace-transform domain is preserved when going back to the original time domain. Initial-boundary conditions of quite general type are considered. 
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Ciarletta, Michele; Scarpetta, Edoardo. A minimum principle in the dynamics of elastic materials with voids. Atti della Accademia nazionale dei Lincei. Rendiconti della Classe di scienze fisiche, matematiche e naturali, Série 8, Tome 83 (1989) no. 1, pp. 187-193. http://geodesic.mathdoc.fr/item/RLINA_1989_8_83_1_a27/

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