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The paper presents a general and robust method for the description of interactions of the permanent type between fluids and structures in fast transient dynamic problems. Over the last couple of years, new models for permanent fluid-structure interaction were introduced in PLEXIS-3C, a computer program for fast transient analysis. The main goal was to generalise and facilitate the use of fluid-structure interaction models for situations of extreme geometrical complexity such as full 3D applications including arbitrary box-like structures with bifurcations, complex intersections, and submerged edges, and in the presence of large displacements, rotations and deformations. The scope was achieved by a new algorithm that completely automates the geometrical definition of the fluid-structure interface. The effort required from users in the specification of problem input data is dramatically reduced with respect to previous implementations and the possibility of human errors during the input phase is almost eliminated. The algorithm may deal with any type of structure, including both continuum and structural elements, with and without a topological thickness, or also represent the interaction between immiscible fluids.

Additional information

Authors: CASADEI F, JRC Ispra (IT);HALLEUX J P, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 3rd US National Congress of Computational Mechanics, Dallas (US), June 12-14, 1995
Availability: Available from (1) as Paper EN 38984 ORA
Record Number: 199510717 / Last updated on: 1995-07-07
Original language: en
Available languages: en