A kind of cross-shaped specimen for biaxial tensile strength test and its making method

Abstract

The invention discloses a crossed test piece for a biaxial stretching strength test. The crossed test piece comprises a middle core region and four stretching arms, wherein the four stretching arms extend outward around the middle core region to form a cross shape; each stretching arm is connected with the middle core region through a transition region; a clamping end is arranged at the end part of each stretching arm and a clamping end rubber rod is arranged at each clamping end; the clamping end rubber rods are used for connecting a clamp of a biaxial stretching testing machine; the crossed test piece for the biaxial stretching strength test is configured as follows: when the biaxial stretching strength test is carried out, the stretching arms are used for transmitting a pull force of the biaxial stretching testing machine to the transition region; finally, the pull force is applied to the middle core region; the middle core region is a core region of the biaxial stretching strength test; stretching damage firstly occurs in the middle core region. The invention further provides a manufacturing method of the crossed test piece for the biaxial stretching strength test. The crossed test piece disclosed by the invention can be used for determining and characterizing the biaxial stretching strength of a fabric membrane material; the damages occur in a single-layer testing region; after being reinforced, the stretching arms and the transition region are damaged; the crossed test piece can be applied to the fields of building membrane materials, airship skins and other industrial fabrics and the like.

Description

technical field [0001] The invention relates to a test piece for testing the biaxial tensile strength of a fabric membrane and a manufacturing method thereof, in particular to a cross-shaped test piece for a biaxial tensile strength test and a manufacturing method thereof, which can be used for architectural membranes The biaxial strength test of fabric membrane materials such as airship skin and airship skin belongs to the field of material mechanics experiment technology and building structure material test technology. Background technique [0002] Fabric membranes are often composed of fabric base fabric and coating, or fabric base fabric and multifunctional layer composite. The fabric base fabric is woven from polymer fibers through spinning, and the coating is to coat the surface of the base fabric with a functional layer. As a lightweight and high-strength composite material, fabric membrane is widely used in construction, aerospace and other fields, and its basic for...

AI Technical Summary

Problems solved by technology

None of these techniques are currently available for biaxial tensile strength testing of fabric membranes

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