Method and devide for measuring orthotropic membrane structure elastic modulus

Abstract

The present invention discloses a method and a device for measuring orthotropic membrane structure elastic modulus, by research and analysis of orthotropic membrane mechanical characteristics, a new method for measuring the orthotropic membrane structure elastic modulus is provided, a measurement theoretical formula is deduced, then the theory correctness can be o verified by experiments, and finally the measuring device applied to engineering practices can be made. The method can be directly applied to measuring of orthotropic and homogeneous membrane elastic modulus, and is a simple and effective measurement method.

Description

technical field [0001] The invention belongs to the technical field of material mechanics parameter testing, and in particular relates to a method and a device for measuring the elastic modulus of an orthotropic membrane structure. Background technique [0002] Orthotropic membrane materials are mainly used in building structures, electronics industry, bioengineering and other fields. Especially in the field of building structures, the vast majority of membrane materials used in architectural membrane structures are fabric membranes. The fabric membrane is composed of a base fabric and a coating on the surface. The base fabric of the fabric membrane is interwoven with orthogonal warp and weft threads, and exhibits strong orthotropic properties in terms of mechanical properties, that is, the mechanical parameters such as elastic modulus and Poisson's ratio in the two directions are different. The rigidity of the architectural membrane structure is achieved by applying pre-t...

AI Technical Summary

Problems solved by technology

The two methods are relatively intuitive, but since the strain gauge needs to be attached to the surface of the membrane to measure the strain of the membrane during the test, and the main force-bearing part of the membrane is the base cloth of the membrane, the strain gauge is attached to the membrane. The coating on the surface of the membrane material makes the measured strain not truly reflect the strain of the membrane base fabric of the main force-bearing part

Therefore, the strain measured by the two methods is not accurate enough, so the final elastic modulus is not accurate enough

At the same time, the single tensile test method cannot measure the elastic modulus in the two directions at the same time; the two-way tensile test method also needs to go through a complicated derivation process to obtain the elastic modulus in the two directions

In addition, the unidirectional and bidirectional tensile methods cannot measure the elastic modulus of the built membrane structure.

Images