Multipoint loading stress application cap for static test

Abstract

The invention provides a multipoint loading stress application cap for a static test, which is characterized in that a hollow cylindrical force bearing column is adopted as a main force bearing structure in the center, and a plurality of ray force bearing beams distributed at equal included angles are fixed on the outer circumference of the force bearing column to serve as a main lever force transmission structure; a mounting hole is formed in the front surface of the outer end of each bearing beam as a loading point, and the centers of all the mounting holes are located on the same circumference with the center of the bearing column as the circle center. According to the multi-point loading stress application cap, on the basis that the test function of a traditional stress application capcan be completed, loads such as axial pressure and bending moment can be applied more evenly, and most installation errors are reduced; the mounting holes are formed in the front face and the side face of the outer end of the force bearing beam, loads such as shearing force and axial pressure can be conveniently achieved, and smooth testing is guaranteed.

Description

technical field [0001] The invention relates to the field of static tests, in particular to a multi-point loading force cap for static tests. Background technique [0002] Static tests play an important role in mechanical test research, especially axial compression, axial tension and bending moment tests, which can account for more than 80% of the total number of tests. [0003] The traditional static test booster cap is designed for two-point loading, see the schematic diagram figure 1 , the shrinkage structure is used to make the two-point loading force converge on the shrinkage structure, and then the loading force is evenly distributed on the circumferential structure by using the enlargement structure. This booster cap is suitable for pure axial compression or axial tension test. However, in the bending moment test, the current bending moment loading uses a lever structure to make a force difference between the two force application points to generate the bending momen...

AI Technical Summary

Problems solved by technology

However, in the bending moment test, the current bending moment loading uses a lever structure to make a force difference between the two force application points to generate the bending moment. However, when the force difference of the two forces passes through the intermediate contraction structure, the two forces will converge. On the shrinking structure, after the enlarged structure is enlarged, the final bending moment loading will be unclear, resulting in the static load bending moment unable to reach the loading target load

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