An Incident-Wave Equivalent Loading Method for Ensuring Split Biaxial Hopkinson Compression Bar Experiments

Abstract

The invention discloses an incident wave equivalent loading method for guaranteeing a split dual-axis Hopkinson pressure bar experiment, and aims to solve the technical problem that the incident wave equivalent loading in the dual-axis Hopkinson pressure rod experiment cannot be implemented by adopting an existing method. According to the technical scheme, the relationship of incident wave amplitude values generated by two sets of equipment can be measured, and according to the relationship of incident wave amplitude values, the thickness of a secondary coil of an electromagnetic force-based incident wave generator which has the relatively small incident wave amplitude value is increased, and magnitude compensation is carried out on an incident wave with relatively small amplitude values in transverse and longitudinal incident waves, caused by processing errors, so that the transverse and longitudinal incident wave amplitude values can be equal. By means of thickness compensation of the secondary coil and serial connection of transverse and longitudinal discharge coils in the same group of discharge capacitors controlled by a same discharge silicon controlled rectifier, the transverse and longitudinal incident waves have equal amplitude values, same pulse widths and consistent trigger time, so that the incident wave equivalent loading in the split dual-axis Hopkinson pressure rod experiment can be guaranteed.

Description

technical field [0001] The invention relates to an incident wave equivalent loading method, in particular to an incident wave equivalent loading method for ensuring a separate biaxial Hopkinson pressure bar experiment. Background technique [0002] In the biaxial Hopkinson pressure bar experiment, it is required to load the incident wave from two mutually perpendicular directions at the same time to carry out equivalent loading on the sample laterally and longitudinally, that is, the time interval between the lateral and longitudinal loading incident wave fronts reaching the contact interface of the sample It must be less than 1 μs, the amplitude of the incident wave of stress under transverse and longitudinal loading is the same, and the pulse width of the incident wave of transverse and longitudinal loading is the same. [0003] refer to Figure 10 , 11 . The document "Application Publication No. CN103913382A Chinese Invention Patent" has developed a separate Hopkinson p...

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Problems solved by technology

[0004] In order to overcome the deficiency that the existing method cannot realize the equivalent loading of the incident wave in the biaxial Hopkinson compression bar experiment, the present invention provides a method for ensuring the equivalent loading of the incident wave in the split biaxial Hopkinson compression bar experiment

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