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Analysis of inelastic effects in wrinkled membranes
Author(s) -
Hornig J.
Publication year - 2003
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200310415
Subject(s) - membrane , wrinkle , materials science , structural engineering , composite material , stiffness , viscoplasticity , plasticity , ultimate tensile strength , flexural rigidity , engineering , finite element method , chemistry , constitutive equation , biochemistry
Abstract Membranes are very suitable for carrying tensile loads, but they fail partially or completely if compressive in‐plane loads occur. Since membranes do not possess any flexural stiffness they can not carry compressive in‐plane loads. In this case membranes wrinkle. It is essentially to take effects of membrane wrinkling into account. Modern materials applied in membrane structures show not only pure elastic but also viscoplastic or plastic behavior. The question rises, how to treat inelastic effects if wrinkling occurs. The presented method is applicable to elastic‐plastic deformation processes in connection with membrane wrinkling. An approach based on a modified Roddeman theory is used (see [1] and [2]). Due to the existence of unrecoverable deformations, one has to reformulate the wrinkling criterion. As an example, a strain space formulation of plasticity (see Besdo and Tietze [3]) is incorporated into the wrinkling algorithm.