A better understanding of the mechanical behaviour of coated fabrics used for architectural membranes can lead to significant improvements in the design of tensile surface structures. The plane biaxial test on a cruciform specimen is considered to be the most appropriate test to characterise the complex non-linear behaviour of such membrane material. The biaxial tests described in the literature are usually carried out under prescribed stress histories at various, constant stress ratios. The present contribution describes some strain-controlled biaxial tests carried out at Politecnico di Milano, in which the strains in the central square of the specimen are prescribed. Such tests can be particularly meaningful in relation to installation and re-tensioning processes. Since they imply a variable stress ratio, the results obtained by these non-traditional tests complement the ones of stress-controlled experiments. It appears that these two types of biaxial tests can be exploited jointly in order to select and calibrate constitutive models for coated fabrics; these are needed for the overall modelling of tensile structures, with the aim of simulating both the response under external loadings and the installation process.

Strain-controlled Biaxial Tests of Coated-Fabric Membranes

BECCARELLI, PAOLO;COLASANTE, GIADA;NOVATI, GIORGIO;ZANELLI, ALESSANDRA
2013

Abstract

A better understanding of the mechanical behaviour of coated fabrics used for architectural membranes can lead to significant improvements in the design of tensile surface structures. The plane biaxial test on a cruciform specimen is considered to be the most appropriate test to characterise the complex non-linear behaviour of such membrane material. The biaxial tests described in the literature are usually carried out under prescribed stress histories at various, constant stress ratios. The present contribution describes some strain-controlled biaxial tests carried out at Politecnico di Milano, in which the strains in the central square of the specimen are prescribed. Such tests can be particularly meaningful in relation to installation and re-tensioning processes. Since they imply a variable stress ratio, the results obtained by these non-traditional tests complement the ones of stress-controlled experiments. It appears that these two types of biaxial tests can be exploited jointly in order to select and calibrate constitutive models for coated fabrics; these are needed for the overall modelling of tensile structures, with the aim of simulating both the response under external loadings and the installation process.
Proceedings of the TENSINET Symposium 2013 [RE]THINKING Lightweight Structures
9789072325068
biaxial behaviour; membrane structures
File in questo prodotto:
File Dimensione Formato  
Beccarelli etal paper tensinet 2013.pdf

Accesso riservato

: Post-Print (DRAFT o Author’s Accepted Manuscript-AAM)
Dimensione 1.17 MB
Formato Adobe PDF
1.17 MB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/844170
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact