High-temperature hopkinson compression bar test system and method assembled synchronously by two-way electromagnetic drive

Abstract

The present invention relates to a high-temperature Hopkinson pressure bar test system and method using two-way electromagnetic drive and synchronous assembly, establishing a set of high-temperature Hopkinson pressure bar system and high-temperature compression using precise electromagnetic drive two-way synchronous sliding assembly system and high-frequency electromagnetic induction rapid heating method experiment method. This device is equipped with a set of electromagnetic control device, a set of electromagnetic drive two-way synchronous assembly device and two high-precision delay devices on the conventional Hopkinson pressure rod, which can accurately control each process in the high temperature dynamic compression test, including the impact process, heating The start and finish times of the process, loading rods, and assembly processes are synchronized, allowing precise control of the hot and cold contact times throughout the testing process. The integrated modular design of control components improves the test accuracy and can accurately and directly test the dynamic compression mechanical properties of materials at high temperatures.

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...

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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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