This paper presents the generalization to a three-dimensional (3D) case of a mechanically-based approach to non-local elasticity theory, recently proposed by the authors in a one-dimensional (1D) case. The proposed model assumes that the equilibrium of a volume element is attained by contact forces between adjacent elements and by long-range forces exerted by non-adjacent elements. Specifically, the long-range forces are modelled as central body forces depending on the relative displacement between the centroids of the volume elements, measured along the line connecting the centroids. Further, the long-range forces are assumed to be proportional to a proper, material-dependent, distance-decaying function and to the products of the interacting volumes. Consistently with the modelling of the long-range forces as central body forces, the static boundary conditions enforced on the free surface of the solid involve only local stress due to contact forces. The proposed 3D formulation is developed both in a mechanical and in a variational context. For this the elastic energy functionals of the solid with long-range interactions are introduced, based on the principle of virtual work to set the proper correspondence between the mechanical and the kinematic variables of the model. Numerical applications are reported for 2D solids under plane stress conditions

Di Paola, M., Failla, G., ZINGALES, M. (2010). The mechanically-based approach to 3D non-local linear elasticity theory: Long-range central interactions. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 47, 2347-2358 [10.1016/j.ijsolstr.2010.02.022].

The mechanically-based approach to 3D non-local linear elasticity theory: Long-range central interactions

DI PAOLA, Mario;ZINGALES, Massimiliano
2010-01-01

Abstract

This paper presents the generalization to a three-dimensional (3D) case of a mechanically-based approach to non-local elasticity theory, recently proposed by the authors in a one-dimensional (1D) case. The proposed model assumes that the equilibrium of a volume element is attained by contact forces between adjacent elements and by long-range forces exerted by non-adjacent elements. Specifically, the long-range forces are modelled as central body forces depending on the relative displacement between the centroids of the volume elements, measured along the line connecting the centroids. Further, the long-range forces are assumed to be proportional to a proper, material-dependent, distance-decaying function and to the products of the interacting volumes. Consistently with the modelling of the long-range forces as central body forces, the static boundary conditions enforced on the free surface of the solid involve only local stress due to contact forces. The proposed 3D formulation is developed both in a mechanical and in a variational context. For this the elastic energy functionals of the solid with long-range interactions are introduced, based on the principle of virtual work to set the proper correspondence between the mechanical and the kinematic variables of the model. Numerical applications are reported for 2D solids under plane stress conditions
Settore ICAR/08 - Scienza Delle Costruzioni
Di Paola, M., Failla, G., ZINGALES, M. (2010). The mechanically-based approach to 3D non-local linear elasticity theory: Long-range central interactions. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 47, 2347-2358 [10.1016/j.ijsolstr.2010.02.022].
File in questo prodotto:
File Dimensione Formato  
dipaola-failla-zingales.pdf

accesso aperto

Dimensione 713.45 kB
Formato Adobe PDF
713.45 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/56426
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 60
  • ???jsp.display-item.citation.isi??? 48
social impact