Direct Methods for Limit States in Structures and Materials by Franck Pastor, Joseph Pastor, Djimedo Kondo (auth.),

By Franck Pastor, Joseph Pastor, Djimedo Kondo (auth.), Konstantinos Spiliopoulos, Dieter Weichert (eds.)

Knowing the protection issue for restrict states akin to plastic cave in, low cycle fatigue or ratcheting is often an incredible layout attention for civil and mechanical engineering constructions which are subjected to rather a lot. Direct equipment of restrict or shakedown research that continue to without delay locate the restrict states supply a greater replacement than designated time-stepping calculations as, on one hand, an actual loading heritage is scarcely identified, and at the different they're much much less time-consuming.
This e-book offers the state-of-the-art on numerous themes referring to those equipment, comparable to theoretical advances in restrict and shakedown research, the advance of correct algorithms and computational tactics, subtle modeling of inelastic fabric habit like hardening, non-associated move ideas, fabric harm and fatigue, touch and friction, homogenization and composites.

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J Eng Mater Technol 99:2–15 9. Jeong HY (2002) A new yield function and a hydrostatic stress-controlled model for porous solids with pressure-sensitive matrices. Int J Solids Struct 39:1385–1403 10. Kovrizhnykh AM (2004) Plane stress equations for the von Mises-Schleicher yield criterion. J Appl Mech Tech Phys 45:894–901 11. Krabbenhoft K, Lyamin A, Hijaj M, Sloan S (2005) A new discontinuous upper bound limit analysis formulation. Int J Numer Methods Eng 63:1069–1088 12. Leblond JB, Perrin G, Suquet P (1994) Exact results and approximate models for porous viscoplastic solids.

The number of elements has been varied from 250 to 330 depending on the considered geometry. A. Pisano et al. Fig. 4 Schematic representation of a single-pin-loaded composite rectangular plate: (a) fixture test for load bearing capacity evaluation; (b) mechanical model, boundary and loading conditions Fig. 5 Schematic representation of the multi-pin joints composite plate: (a) fixture test for load bearing capacity evaluation; (b) mechanical model Configurations second, third and fourth, concern multi-pin joints plates.

E. σj . To this aim an iterative procedure, involving a sequence of linear FE-based analyses, is performed on the structural element assumed as made of an orthotropic linear viscous fictitious material with spatially varying moduli and subjected to a distribution of imposed initial stresses. At each iteration, the fictitious moduli are then adjusted and the initial stresses are varied so that the computed fictitious linear stresses are brought on the yield surface at a fixed strain rate distribution.

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