Device and method for biaxial pull-press loading test device of material

Abstract

The invention provides a device for a biaxial pull-press loading test device of a material. The device consists of a clamping end (1), a loading press block (2), four inclined loading arms (4-1, 4-2, 4-3 and 4-4), two eudipleural stretching supporting seats (5-1 and 5-2), four chucks (8-1, 8-2, 8-3 and 8-4) and a base (7), wherein the two adjacent inclined loading arms on the left side are connected with a stretching supporting seat (5-1), the two adjacent inclined loading arms on the right side are connected with a stretching supporting seat (5-2), the two stretching supporting seats (5-1 and 5-2) are eudipleural, the inclined loading arms are upward connected with the loading press block (2) through top hinged supports (3-1 and 3-2) and are downward connected with the base through bottom hinged supports (6-1 and 6-2); the four chucks (8-1, 8-2, 8-3 and 8-4) are separately arranged on the loading press block (2), the two stretching supporting seats (5-1 and 5-2) and the base (7). Compared with the prior art, the device disclosed by the invention has the advantages that the structure is simple and convenient to maintain; the device can be conveniently matched with an uniaxial testing machine to realize a biaxial pull-press loading test, so that the test cost is reduced.

Description

technical field [0001] The invention relates to the field of complex load testing of composite materials, in particular to a device and method for biaxial tension-compression loading testing of materials. Background technique [0002] The application proportion of composite materials in load-bearing structures is increasing, which makes the stress state of materials more and more complex. Therefore, it is more and more necessary to study the strength characteristics of composite materials, especially the failure characteristics under biaxial stress or multiaxial stress state, so as to ensure the safety of material structures in use. [0003] At present, the uniaxial performance testing technology of composite materials is relatively mature. Generally, it only needs to be loaded in a certain loading direction to obtain the uniaxial mechanical properties of materials. Common uniaxial test standards for composite materials can be found in GB / T 1447-2005 (static Tensile perform...

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