Two-way tensile loading device

Abstract

The invention provides a two-way tensile loading device, comprising: a fixed base; a loading rod, which vertically passes through the fixed base and can move vertically relative to the fixed base, the upper end of the loading rod is connected to a mechanical testing machine, and the lower end There are lugs for pivotally connecting the test piece; and a link mechanism, which converts the load applied by the mechanical testing machine to the test piece through the loading rod into vertical and horizontal tensile loads; wherein the connecting The rod mechanism includes an outer rod assembly and an inner rod assembly. The bidirectional tensile loading device according to the present invention distributes the load by means of the movement of the "umbrella" linkage mechanism, and then transmits the distributed orthogonal bidirectional load to the test piece.

Description

technical field [0001] The invention belongs to the technical field of aeronautical structures and material loading tests, and in particular relates to a bidirectional tensile loading device for bidirectional loading tests, which is suitable for loading tests of square, cross or circular test pieces. Background technique [0002] Most of the structural parts in the aircraft are subjected to two-way stress, and the orthogonal two-way loading test can best simulate the real stress state of aircraft parts. However, due to the complexity of bidirectional loading test design, most of the material-level, component-level and even section-level strength tests carried out in the aviation industry are still designed in the form of unidirectional tension. Load the instruction file for the experiment. [0003] The most common existing two-way loading method is to use two sets of hydraulic loading actuators. This method needs to overcome the steps between the two sets of loading systems...

AI Technical Summary

Problems solved by technology

However, due to the complexity of bidirectional loading test design, most of the material-level, component-level and even section-level strength tests carried out in the aviation industry are still designed in the form of unidirectional tension. Guidance document for loading tests

[0003] The most common existing two-way loading method is to use two sets of hydraulic loading actuators. This method needs to overcome the steps between the two loading systems, and the test cost is high.

For example, Chinese patent CN200810017989.1 discloses a device that can complete two-way loading on the platform of a unidirectional tensile testing machine, but the device uses welding to fix threaded rods in many places, making the structural installation relatively complicated, and the test can be carried out Part size is too small

Chinese patent CN201310652430.7 discloses a ring-shaped load resolver, the implementation method is relatively simple, but the manufacture of the ring-shaped device and its fixed support design on the test bench will be more difficult

Chinese patent CN201010240086.7 discloses a mechanical bidirectional tensile tester, which can convert out-of-plane uniaxial tensile loads into in-plane biaxial tensile loads of various proportions, but it has more components and a more complex structure. more complex and can only be applied to smaller cross-shaped test pieces

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