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Elasto - Plastic Analysis of Cable Net Structures

by J. L. Meek, Univ of Queensland, Queensland,



Document Type: Proceeding Paper

Part of: Spatial, Lattice and Tension Structures

Abstract:

This paper presents a Newton-Raphson interaction technique which takes account of plastic cable strains while iterating on the nodal equilibrium equations of cable net structures. The stability of the iteration procedure is controlled by using a modulus which lies between the cable tangent and secant moduli. In this way the plastic strains in members whose forces have exceeded the elastic limit are built up at a faster rate than simple elastic strain increments. An example is given which shows how the method controls the number of iterations.

Subject Headings: Cables | Structural analysis | Strain | Structural stability | Plastic analysis | Synthetic materials | Plastics

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