High-temperature Hopkinson tensile bar test system by using two-way electromagnetically-driven synchronous assembly and method

Abstract

The invention relates to a high-temperature Hopkinson tensile bar test system by using two-way electromagnetically-driven synchronous assembly and method. A high-temperature Hopkinson tensile bar system and a high-temperature compression test method which use an accurate electromagnetically-driven two-way synchronous sliding assembly system and a high-frequency electromagnetic induction rapid heating method are built. According to the device in the invention, a set of electromagnetic control device, a set of electromagnetically-driven two-way synchronous assembly device and two high-precisiondelay devices are additionally arranged on the conventional Hopkinson tensile bar, the starting and ending time of each process including an impact process, a heating process and a loading rod synchronous assembly process during the high-temperature dynamic compression test can be accurately controlled, and the cold and hot contact time during the whole test process can be further accurately controlled. A control component is designed in an integrated module mode, the test accuracy is improved, and the dynamic compression mechanical properties of the material at a high temperature can be accurately and directly tested.

Description

technical field [0001] The invention belongs to the separated Hopkinson pressure bar (SHPB) technology, and relates to a high-temperature Hopkinson pressure bar test system and method using bidirectional electromagnetic drive for synchronous assembly, and a quantitative high-temperature high-strain rate compression test technology for synchronous assembly using bidirectional electromagnetic drive . Background technique [0002] Split Hopkinson pressure bar (SHPB), as the key test technology for testing the high strain rate compressive mechanical properties of materials and structures, is widely used in the field of dynamic testing. Traditional SHPB equipment is often used for dynamic mechanical performance testing of metal materials, composite materials, rock concrete, ceramics and other materials at room temperature. However, with the continuous development of new materials, more and more materials (especially metal materials and ceramic materials) are widely used in the e...

AI Technical Summary

Problems solved by technology

[0007] In order to avoid the deficiencies of the prior art, the present invention proposes a high-temperature Hopkinson compression bar test system and method that utilizes two-way electromagnetic drive and synchronous assembly to solve the problem that the separated Hopkinson compression bar must avoid the contact between the loading bar and the high-temperature dynamic compression test. The heat exchange of the sample leads to the generation of the temperature gradient field

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