The interphase finite element

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• 作者：Giuseppe Giambanco (1) giuseppe.giambanco@unipa.it
  Giuseppe Fileccia Scimemi (1)
  Antonino Spada (1)
• 关键词：Heterogeneous materials – ; Mesomodelling – ; Interphase – ; Finite element
• 刊名：Computational Mechanics
• 出版年：2012
• 出版时间：September 2012
• 年：2012
• 卷：50
• 期：3
• 页码：353-366
• 全文大小：641.3 KB
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• 作者单位：1. Department of Civil, Environmental and Aerospace Engineering, University of Palermo, Viale delle Scienze, 90128 Palermo, Italy
• ISSN：1432-0924

文摘

Mesomodelling of structures made of heterogeneous materials requires the introduction of mechanical models which are able to simulate the interactions between the adherents. Among these devices is quite popular the zero thickness interface (ZTI) model where the contact tractions and the displacement discontinuities are the primary static and kinematic variables. In some cases the joint response depends also on the internal stresses and strains within the thin layer adjacent to the joint interfaces. The interphase model, taking into account these additional variables, represents a sort of enhanced ZTI. In this paper a general theoretical formulation of the interphase model is reported and an original finite element, suitable for two-dimensional applications, is presented. A simple numerical experiment in plane stress state condition shows the relevant capabilities of the interphase element and allows to investigate its numerical performance. Some defects related to the shear locking of the element are resolved making use of well known numerical strategies. Finally, further numerical application to masonry structures are developed.