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True biaxial dynamic stretching experiment apparatus

A technology of dynamic stretching and experimental device, which is applied in the direction of testing the strength of materials with a single impact force and testing the strength of materials with the application of stable tension/pressure, which can solve the problems of the difficulty in realizing the biaxial impact tensile test and the synchronization of the loading system. Difficult to guarantee and other problems, to achieve the effect of expanding the scope of use and ensuring synchronization

Active Publication Date: 2018-08-14
GUANGZHOU UNIVERSITY
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Problems solved by technology

[0003] The existing mature technology is the one-dimensional Hopkinson tension rod test device, but when it is applied to the two-axis tensile test, since it needs to be loaded in two orthogonal directions, it is difficult to guarantee the synchronization of the loading system, making the two Axial impact tensile experiments are difficult to achieve, and solving the synchronization problem is the key to solving biaxial tension

Method used

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  • True biaxial dynamic stretching experiment apparatus
  • True biaxial dynamic stretching experiment apparatus
  • True biaxial dynamic stretching experiment apparatus

Examples

Experimental program
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Embodiment 1

[0022] Such as figure 1 As shown, the present embodiment provides a true biaxial dynamic tensile test device, comprising:

[0023] Specimen 7, the material to be tested in the experiment, has a cubic structure;

[0024] Two shock wave propagating devices arranged longitudinally and transversely, with the test piece 7 as the center, the lower end of the shock wave propagating device arranged longitudinally is attached to one surface of the test piece 7, and the left end of the shock wave propagating device arranged transversely is connected to the test piece The other surface of 7 is pasted, and the two shock wave propagation devices are respectively pasted on the two adjacent surfaces of the test piece 7;

[0025] The shock wave loading device includes a loading rod 1 and a driving device for driving the loading rod 1 to move and reach a certain speed;

[0026] The shock wave splitting device 2 has a loading surface 22 flush with the end of the loading rod 1 at the rear end,...

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Abstract

The invention relates to an experiment apparatus for biaxial synchronous impact stretching loading on a material, concretely relates to a true biaxial dynamic stretching experiment apparatus, realizesthe true biaxial synchronous impact stretching experiment on the material, and is suitable for dynamic stretching performance research on the material under a biaxial state, and stretching waves of two shafts are simultaneously effected on a test piece, the stretching waveform has same amplitude and pulse width, loading waveform control is realized, so that the dynamic mechanical properties of the material under the biaxial stretching effect can be researched, and the experiment apparatus provides abundant dynamic mechanics experiment data for a material impact experiment.

Description

technical field [0001] The invention relates to an experimental device for carrying out biaxial synchronous impact tensile loading on materials, in particular to a true biaxial dynamic tensile experimental device. Background technique [0002] The mechanical properties of materials under the action of dynamic tension is an important index for studying materials. Generally, the dynamic tension test data of materials are carried out through one-dimensional Hopkinson rods, and the obtained tensile constitutive relationship is used as the basis for numerical simulation. For tensile simulations in 2D and 3D complex stress states, strength theory is usually used to apply 1D experimental data to 2D or 3D, and the strength of materials in 2D or 3D is different from that in 1D. Moreover, the strength of the material under impact is essentially different from the static state. Under the dynamic loading state, the deformation of the material has an obvious strain rate effect, and diffe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/30G01N3/08
CPCG01N3/08G01N3/30
Inventor 陶为俊庞书孟陈江平浣石
Owner GUANGZHOU UNIVERSITY
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