Nonlinear Static and Dynamic Analysis of Steel Structures with ...

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Chapter 2 Finite element modeling with ABAQUS/Standard 36 Fig. 2.9: Node ordering and face numbering on shell elements Fig. 2.10: Numbering of shell elements integration points
Finite element modeling with ABAQUS/Standard Chapter 2 2.3 Interactions Contact pairs in Abaqus/Standard can be used to define interactions between bodies in mechanical, coupled temperature-displacement, coupled pore pressure-displacement, coupled thermal-electrical, and heat transfer simulations and do not have to use surfaces with matching meshes. 2.3.1 Defining contact pairs To define a contact pair, you must indicate which pairs of surfaces may interact with one another or which surfaces may interact with themselves. Contact surfaces should extend far enough to include all regions that may come into contact during an analysis; however, including additional surface nodes and faces that never experience contact may result in significant extra computational cost (for example, extending a slave surface such that it includes many nodes that remain separated from the master surface throughout an analysis can significantly increase memory usage unless penalty contact enforcement is used). 2.3.2 Discretization of contact pair surfaces Conditional constraints are applied at various locations on interacting surfaces to simulate contact conditions. The locations and conditions of these constraints depend on the contact discretization used in the overall contact formulation. Two contact discretization options are offered: a traditional ―node-to-surface‖ discretization and a true ―surface-to-surface‖ discretization. Node-to-surface contact discretization With traditional node-to-surface discretization the contact conditions are established such that each ―slave‖ node on one side of a contact interface effectively interacts with a point of projection on the ―master‖ surface on the opposite side of the contact interface (see Fig. 2.11). Thus, each contact condition involves a single slave node and a group of nearby master nodes from which values are interpolated to the projection point. Fig. 2.11: Node-to-surface contact discretization Traditional node-to-surface discretization has the following characteristics: 37
Page 1: Δθνικό Μεηζόβιο Πο
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Chapter 5 Dynamic analysis of steel
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Chapter 5 Conclusions Detailed fin
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[22] L.R.O. de Lima, L. Simoes da S
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Nonlinear Static and Dynamic Analysis of Steel Structures with ...

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