In-situ test instrument for micromechanics performances of materials under three-point and four-point bending action

Abstract

The invention relates to an in-situ instrument for micromechanics performances of materials under three-point and four-point bending action, belonging to the technical field of micromechanics performance test of materials. The in-situ instrument belongs to an electro-mechanics integrated precise test instrument for micromechanics performances of materials. A direct-current servo motor is connected with a worm wheel and a worm; after slowing-down torque increasing is realized, a lead screw is driven by virtue of a secondary worm and gear transmission mechanism; after combination of the support of a foundation bed, a precise slide block is driven by the lead screw to move a bent head; and by combining the co-action of supporting units of a test sample, three-point bending and four-point bending experiments are realized. The in-situ test instrument for the micromechanics performances of the materials under three-point and four-point bending action has the advantages of a small size, a compact structure, light weight, good dynamic characteristic and low energy consumption. A sensor is directly arranged on the instrument foundation bed, so that the test precision is sufficiently guaranteed; meanwhile, the spacing between the bent heads at the two sides can be regulated, a three-point bending pressure head and a four-point bending pressure head are convenient to dismount, simple to exchange, and vertical structural arrangement is adopted, so that the condition that the instrument can be compatible with an objective table structure of commercial material property characterization instrument equipment is facilitated.

Description

technical field [0001] The invention relates to the technical field of testing the microscopic mechanical properties of materials, in particular to the technical field of in-situ testing of the microscopic mechanical properties of materials, in particular to an in-situ testing instrument for the microscopic mechanical properties of materials under the action of three-point and four-point bending. It uses electron microscopy and other microscopic imaging instruments (such as scanning electron microscope SEM, raman spectrometer, X-ray diffractometer, metallographic microscope and optical microscope, etc.) to analyze the loading process while performing three-point bending or four-point bending loading on the sample In-situ monitoring of the microscopic deformation, damage and fracture process of medium samples belongs to the technical field of high-end manufacturing equipment and material testing machines. Background technique [0002] Any mechanical parts or tools are oft...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide an in-situ test instrument for the micro-mechanical properties of materials under the action of three-point and four-point bending, which solves the problems of existing mechanical equipment in testing the mechanical properties of materials and observing the micro-morphological changes of specimens during this process. Independent and separated problems, as well as problems such as large volume, complex structure, high cost and poor compatibility of existing test equipment, test the material micromechanical properties of material specimens through different load loading methods, and then provide a three-point bending , The in-situ test instrument for the micro-mechanical properties of materials under the action of four-point bending can obtain accurate load-deflection curves while obtaining accurate load-deflection curves , which can in-situ and real-time monitor the microscopic deformation, damage, crack initiation, propagation path and other micromechanics of the tested piece under the conditions of three-point bending and four-point bending

Images