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A loading method for bidirectional tensile test

A technology of biaxial stretching and bidirectional loading, applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems of complex structure, small test load and test piece size, damage to the test device, etc., to achieve simple structure and cost. The effect of low and low-occupancy test resources

Active Publication Date: 2016-02-24
CHINA AIRPLANT STRENGTH RES INST
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Problems solved by technology

However, the structure of the device is complex, the test load and the size of the test piece that can be carried out are small, and the fatigue test is easy to cause damage to the test device

Method used

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  • A loading method for bidirectional tensile test
  • A loading method for bidirectional tensile test

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Embodiment Construction

[0026] Below in conjunction with embodiment and accompanying drawing, the present invention is further described:

[0027] The loading method of the two-way tensile test of the present invention uses the circular load resolver to decompose the one-way load into two-way loads by using its lever principle, and then loads the two-way load on the test piece to realize the two-way loading of the two-way tensile test .

[0028] The load splitter includes two symmetrical ring structures, wherein at least one ring structure is a loading end, the loading point of the ring structure is on its central symmetry line, the two sides are load transmission ends, and the two sides are The load direction of the load transmission end is perpendicular to each other and points to the center of the ring structure, and the load direction of the other ring structure is antisymmetric to the load direction of the ring structure.

[0029] There are several force transmission points at the load transmis...

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Abstract

Belonging to tensile loading technologies, the invention in particular relates to a loading method for two-way tensile test. The loading method for biaxial tensile test provided by the invention makes use of a lever principle to decompose a one-way load into two-way loads through an annular load decomposer, then the two-way loads are loaded onto a test piece so as to realize two-way loading of two-way tensile test. The force transfer points of the load decomposer can be adjusted according to an actual loading ratio to meet the requirements of any load ratio, thus realizing synchronous two-way loading of the test piece. The synchronization problem does not exist in the loading system. At the same time, by changing the size of annular structures, two-way loading on large test pieces can be conducted, and the method also can be used for static and fatigue test. In addition, the annular load decomposer involved in the invention has a simple structure, the method occupies fewer test resources, and is low in cost, thus having great practical application value.

Description

technical field [0001] The invention belongs to the tensile loading technology, in particular to a loading method for a bidirectional tensile test. Background technique [0002] Some structures are often subjected to complex stress fields of tension, shear, and multi-directional simultaneous loading in actual use, among which the bidirectional tensile stress field is a typical complex stress field. The bidirectional tensile test mainly investigates the complex stress field of the structure under two mutually perpendicular tensile load states. [0003] When performing bidirectional tensile tests, some existing technologies have limited bidirectional loading ratios, poor synchronization control, complex devices, high test costs, and small test pieces or loads that can be carried out. Small and unable to perform fatigue tests. [0004] For example, Japan's two-way tensile platform is a horizontal testing machine, which is driven by a motor or a hydraulic pressure roller screw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08
Inventor 陈昊柴亚南汪厚冰
Owner CHINA AIRPLANT STRENGTH RES INST
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