Saturation of the stress-strain behaviour of architectural fabrics

Uhlemann, Jörg; Surholt, Felix; Westerhoff, André; Stranghöner, Natalie; Motevalli, Mehran; Balzani, Daniel

doi:10.1016/j.matdes.2020.108584

Cited by 10 publications

(16 citation statements)

References 13 publications

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“…Saturation tests, i.e., mono- or biaxial tensile tests with numerous identical load cycles, are suitable to extract the elastic share in the stress–strain paths of fabrics [ 9 , 10 , 11 ]. In the present contribution, biaxial saturation tests are performed with 1000 load cycles.…”

Section: Materials Properties and Experimental Methodsmentioning

confidence: 99%

“…Only coated fabric is investigated here as uncoated glass fiber fabric is not fit for architectural service. For later comparisons, a PES-PVC fabric investigated in [ 9 ] is also taken into account. It is a type III PES-PVC with tensile strength

of 130

and 114

in the warp and fill directions, respectively.…”

Section: Materials Properties and Experimental Methodsmentioning

confidence: 99%

“…A precise separation facilitates the quantification of the single effects. Invariable states, i.e., mechanically saturated states can be approached by (biaxial) tests with multiple monotonous load cycles [ 9 ]. In a state acceptably close to the ideal saturated state of the stress–strain paths—which is only achieved after infinite load cycles—the elastic share of the initially inelastic stress–strain paths of woven fabrics is revealed.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, the mechanical saturation behavior and elastic share of the stress–strain response of two types of PTFE-coated woven glass fiber fabrics are examined and compared to the recently reported saturation behavior of a PVC-coated polyester fabric [ 9 ]. The saturation behavior is found to be similar to the PES-PVC fabric behavior.…”

Section: Introductionmentioning

confidence: 99%

“…The saturation behavior is found to be similar to the PES-PVC fabric behavior. The irreversible strain increments settle fast and stay on a low constant level but the overall slope and nonlinear form of the stress–strain paths require more than 1000 load cycles to be saturated [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

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The Elastic Share of Inelastic Stress–Strain Paths of Woven Fabrics

et al. 2020

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Manifold variations of the mechanical behavior of structural woven fabrics appear in the first load cycles. Nevertheless, invariable states, i.e., mechanically saturated states, can be approached by multiple monotonous load cycle biaxial tests. In a state acceptably close to the ideal saturated state, the stress–strain paths reveal the elastic share of the initially inelastic stress–strain paths of woven fabrics. In this paper, the mechanical saturation behavior of two types of PTFE-coated woven glass fiber fabrics is examined and compared to the recently reported saturation behavior of a PVC-coated polyester fabric. With the help of the saturation test data, an extrapolation function is developed that facilitates an estimation of late cycle stiffness behavior based on measured early cycle behavior. Furthermore, the considerable impact of late cycle properties on structural analyses is shown exemplarily in the numerical simulation of a prestressed fabric structure by comparing results achieved from late and early load cycle stiffness parameters.

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Section: Materials Properties and Experimental Methodsmentioning

confidence: 99%

of 130

and 114

in the warp and fill directions, respectively.…”

Section: Materials Properties and Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Elastic Share of Inelastic Stress–Strain Paths of Woven Fabrics

et al. 2020

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A Minimalistic, Synthetic Cell‐Inspired Metamaterial for Enabling Reversible Strain‐Stiffening

Taale

Schmidt

Taheri

et al. 2023

Adv Materials Technologies

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Strain‐stiffening, i.e. the nonlinear stiffening of a material in response to a strain, is an intrinsic feature of many biological systems, including skin, blood vessels, and single cells. To avoid a mismatch in mechanical properties, synthetic materials in contact with such biological systems should also be strain‐stiffening. Conventional strain‐stiffening materials are either highly dependent on the applied strain‐rate, or only available for a limited stiffness regime. Both aspects limit the applicability of these materials. In contrast, living cells employ a dynamic strain‐stiffening mechanism that is based on the cross‐linking of cytoskeletal fibers in response to external stress. This strain‐stiffening of the cytoskeleton is mimicked in a mechanical metamaterial by a minimalistic structure consisting of parallel slats connected to backbones. Herein, it is demonstrated experimentally that the structures can be adapted such that the strain required for stiffening, the final stiffness, as well as the degree of stiffening can be tuned, particularly by combining several strain‐stiffening elements. These properties make the structure promising for the development of devices that should resemble the mechanical properties of human soft tissues, e.g., skin‐integrated flexible electronics and blood vessel grafts.

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Biaxiales Tragverhalten von Gewebemembranen nach DIN EN 17117‐1

Uhlemann

Stranghöner

2020

Stahlbau

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Mit DIN EN 17117‐1 liegt seit etwa einem Jahr erstmals eine europäische Norm zur Durchführung und Auswertung von biaxialen Zugversuchen an beschichteten Textilien vor, wie sie im Membranbau Anwendung finden. Der vorliegende Beitrag bietet eine Vorstellung, Analyse und Bewertung der neuen Regelungen. Besondere Neuerungen gegenüber der bisherigen Versuchspraxis wie Regelungen zur Probekörpergeometrie, zum Lastprotokoll und der Belastungsgeschwindigkeit werden erläutert und bewertet. Der Beitrag zeigt den Unterschied zwischen elastischen Bemessungs‐ und Vergleichskonstanten und zeigt beispielhaft deren Anwendung und Interpretation.

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Saturation of the stress-strain behaviour of architectural fabrics

Cited by 10 publications

References 13 publications

The Elastic Share of Inelastic Stress–Strain Paths of Woven Fabrics

The Elastic Share of Inelastic Stress–Strain Paths of Woven Fabrics

A Minimalistic, Synthetic Cell‐Inspired Metamaterial for Enabling Reversible Strain‐Stiffening

Biaxiales Tragverhalten von Gewebemembranen nach DIN EN 17117‐1

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