Double-cross-shaped composite fabric membrane double-axis tensile strength test piece and manufacturing method thereof

Abstract

The invention discloses a double-cross-shaped composite fabric membrane double-axis tensile strength test piece. The test piece comprises a center core area and four cantilevers extending outsides around the center core area to form a cross shape, each cantilever is connected to the center core area through an edge transition area, the end of each cantilever is a clamping section provided with a clamping end rubber rod, and the clamping end rubber rod is used for connecting a clamp of a double-axis tensile test machine; the clamping section is divided into three layers, each cantilever and the edge transition area have double layers, the center core area has a single layer, and the edge transition area is a quadrangle of which four angles have fillets. The invention further provides a manufacturing method of the test piece. The double-cross-shaped composite fabric membrane double-axis tensile strength test piece can test and represent the fabric membrane double-axis tensile strength, destruction happens at the single-layer test area, the cantilevers and edge transition areas are strengthened and later destructed, and the test piece can be applied to building membrane, airship envelops, other industrial fabric fields and the like.

Description

technical field [0001] The invention relates to a test piece for testing the biaxial tensile strength of a flexible fabric membrane material, in particular to a biaxial tensile strength test piece of a double-cross composite fabric membrane material and a manufacturing method thereof, which can be used in construction The biaxial tensile strength test of flexible films such as coated fabric membranes and airship high-performance multifunctional laminated skins belongs to the field of material mechanics experiment technology and building structure material test technology. Background technique [0002] Flexible fabric film materials are often composed of load-bearing fabric base fabrics and functional coatings. They are widely used in construction, aerospace and other industrial fields, and the basic force is in a two-way tension state. The biaxial tensile test method has been widely used in the study of the mechanical properties of the two-dimensional stressed state of the f...

AI Technical Summary

Problems solved by technology

[0014] At present, the biaxially stretched double cross specimens of flexible fabric membranes used for the study of mechanical behavior in the normal use stage, when the stress level is high, due to stress concentration effects such as slits and edge chamfers, the specimens will not When the stress level is much lower than the uniaxial tensile strength, failure occurs in the stress concentration area, and its stress value cannot represent the biaxial tensile strength of the fabric membrane, and its failure form cannot reveal the true mechanical behavior mechanism of biaxial stretching

At present, these technologies do not meet the technical requirements of fabric membrane biaxial tensile strength test.

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