Cross compression sample holder for dual-axis loading system and loading method

Abstract

The invention discloses a cross compression sample holder for a dual-axis loading system and a loading method and relates to the technical field of the material complex load test. The holder includesclamping ends, a loading pressing block, a pressure sensor and a base, wherein the loading pressing block is mounted above the base, the pressure sensor is arranged between the loading pressing blockand the base and is connected with a computer, the clamping ends are four, and the four clamping ends are matched with four side surfaces of the loading pressing block and are used for clamping loading arms of a cross compression sample. The holder is advantaged in that the holder can not only be applied to regular compression experiments of the cross sample, but also can be applied to pull-pressing cycle loading experiments of the cross sample, and the holder is simple in structure, is convenient for processing and maintenance and has high experiment accuracy.

Description

technical field [0001] The invention relates to the technical field of material complex load testing, in particular to a cross compression sample fixture and a loading method for a biaxial loading system. Background technique [0002] Metal materials are used in a large proportion in various mechanical structures, and the stress state they bear is very complicated. Therefore, the research on the strength characteristics of materials in complex environments, especially under biaxial loading conditions, is becoming more and more urgent. [0003] As the use of plates is becoming more and more extensive, it is necessary to have more accurate characterization of the mechanical properties of their materials. In engineering applications, plates are often subjected to complex stress states, and often encounter problems such as cracking, wrinkling, springback, and thinning when forming plates. Therefore, the data obtained from uniaxial tensile experiments and biaxial tensile experim...

AI Technical Summary

Problems solved by technology

Unable to solve biaxial compression problem

Invention patent "Loading device and method for biaxial tensile test of materials" (application number: 201410536501.1) and invention patent "Loading device and method for biaxial compression test of materials" (application number: 201410536931.3) Although such devices It can achieve biaxial tension and biaxial compression loading with a fixed load ratio, but it cannot be compared with the biaxial loading system in terms of experimental accuracy, and the obtained experimental data requires secondary conversion

Such as the invention patent "a biaxial tensile test device" (application number: 20155909.0) and the invention patent "small self-aligning unidirectional loading biaxial tension and compression test device" (application number: 20122034.7) (the test piece realized by this invention size and loading limit are small, the scope of application is limited, and two loading motors are required), this type of device is easier to achieve any ratio biaxial tension or compression test, but due to the complex structure of the test equipment, the cost is high, and it is difficult for the control The requirements of the system are relatively high, so the application of this method is limited to a certain extent

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