General Continuum Models for Discrete Structures

by Taft H. Broome, Jr., NASA, HU Large Space Structures, Inst, Washington, DC, USA,
Michael M. Ackroyd, NASA, HU Large Space Structures, Inst, Washington, DC, USA,



Document Type: Proceeding Paper

Part of: Damage Mechanics and Continuum Modeling

Abstract: New knowledge is presented about the structural behavior of a variety of large repetitive lattice configurations of the type appropriate for utilization in cosmic space. Focus is placed upon configurations which have not been studied, and which cannot be represented by specific geometrical classes of continua such as beams, plates or shells. The methodology for generating a geometrically general class of continua to represent complex lattices is characterized by a mapping of the geometry and material properties of the lattice into general continua whose material properties can be prescribed independently of the lattice's architecture, and whose loading consists of the lattice's loading together with an intrinsic load (called the load correction). This load correction is formulated in a manner that is consistent with the constraint that the continuum and the lattice exhibit similar kinematic responses to their loadings.

Subject Headings: Lattices | Load factors | Material properties | Structural behavior | Geometrics | Materials characterization | Continuum mechanics | Space structures

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