Enhancement of a meso-scale material model for nonlinear elastic finite element computations of plain-woven fabric membrane structures. (15th December 2018)

• Record Type: Journal Article
• Authors: Gade, Jan; Kemmler, Roman; Drass, Michael; Schneider, Jens
• Is Part Of: Engineering structures. Volume 177(2018)
• Page Start: 668
• Page End: 681
• Publication Date: 2018-12-15
• Subjects: Woven fabric membranes -- Meso-scale material model -- Multiscale modelling -- Multilevel finite element method -- FE2 -- Inverse problems -- Parameter identification -- Levenberg-Marquardt algorithm -- Nonlinear finite element analyses; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2018.04.039
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: An established meso-scale model for plane-woven fabric membrane materials is enhanced. Material parameters are identified by the solution of an inverse problem. Using a meso-macro transition membrane structures are computed within finite element analyses. Abstract: Due to their structure of crossed yarns embedded in coating, woven fabric membranes are characterised by a highly nonlinear stress-strain behaviour. In order to determine an accurate structural response of membrane structures, a suitable description of the material behaviour is required. Typical phenomenological material models like linear-elastic orthotropic models only allow a limited determination of the real material behaviour. A more accurate approach becomes evident by focusing on the meso-scale, which reveals an inhomogeneous however periodic structure of woven fabrics. The present work focuses on an established meso-scale model. The novelty of this work is an enhancement of this model with regard to the coating stiffness. By performing an inverse process of parameter identification using a state-of-the-art Levenberg-Marquardt algorithm, a close fit w.r.t. measured data from a common biaxial test is shown and compared to results applying established models. Subsequently, the enhanced meso-scale model is processed into a multi-scale model and is implemented as a material law into a finite element program. Within finite element analyses of an exemplary full scale membrane structure by using the implemented material model as well as by using established material models, the results are compared and discussed.