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Download PDF by Paolo Beccarelli: Biaxial Testing for Fabrics and Foils: Optimizing Devices

By Paolo Beccarelli

ISBN-10: 331902227X

ISBN-13: 9783319022277

ISBN-10: 3319022288

ISBN-13: 9783319022284

This ebook deals a well-structured, serious assessment of present layout perform for tensioned membrane constructions, together with a close research of the experimental facts required and important matters in relation to the inability of a collection of layout codes and trying out strategies. The technical standards for biaxial trying out apparatus are analyzed intimately, and features that have to be thought of whilst constructing biaxial checking out techniques are emphasised. The research is supported by way of the result of a round-robin workout evaluating biaxial trying out machines that concerned 4 of the most study laboratories within the box. The biaxial checking out units and tactics almost immediately utilized in Europe are commonly mentioned, and knowledge is equipped at the layout and implementation of a biaxial checking out rig for architectural materials at Politecnico di Milano, which represents a benchmark within the box. the importance of the latest advancements in biaxial trying out is usually explored.

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Extra resources for Biaxial Testing for Fabrics and Foils: Optimizing Devices and Procedures

Sample text

They can be subdivided in cable nets, which describe three-dimensional surfaces, cable domes and their two-dimensional version represented by cable trusses. Despite the overall complete difference aspect, cable nets share the basic physical principles which regulate their equilibrium and shape with the boundary tensioned membranes described above. According to Lewis (2003), from the point of view of an analyst it can be said that they represent a discrete-type of membrane with no considerable differences, therefore they can both be called a tensioned structure.

This results in relatively high costs for the computational analyses which should be added to the intrinsic cost-effectiveness of this type of structures. These features highlight the fundamentally different approach between conventional roofing forms and tension membranes which require a tight collaboration between the subjects involved in the design and realisation of this type of building. Considering the design phase, it can be seen that ordinary structures are generally the outcome of two different protagonists: the architect, in charge of the initial proposal and its development from the aesthetical point of view up to the singular detail, and the engineer responsible for the static equilibrium of the structure, which has to meet the aesthetic requirements within a reasonable cost and feasibility of the structure.

0 kN/m (or 1 % of the ultimate uniaxial tensile strength if it is greater) and 25 % of the ultimate uniaxial tensile strength. Each load cycle should be repeated 3 times using at least 3 samples from each bulk sample. A strain rate between 2 and 4 mm/ min is recommended. The calculation of the elastic moduli and Poisson’s ratios can be based on several methods such as the graphical linear approximation of the experimental curves, the Least Squares stress or strain minimisation, the mini-max absolute error or the multi-linear approximation.

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Biaxial Testing for Fabrics and Foils: Optimizing Devices and Procedures by Paolo Beccarelli

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