Test piece clamping device for large-diameter split Hopkinson pressure bar

Abstract

The invention discloses a test piece clamping device for a large-diameter split Hopkinson pressure bar. The test piece clamping device comprises a fixing end and a sliding end, wherein the fixing endcomprises a fixing sleeve; the fixing sleeve is sleeved with a fixing ferrule; the fixing ferrule is provided with a plurality of fixing holes; the sliding end comprises a sliding sleeve; the slidingsleeve is sleeved with a sliding ferrule through a plurality of sliding chutes which are formed uniformly; slide blocks which are matched with the sliding chutes are fixedly arranged on the inner wallof the sliding ferrule; the sliding ferrule is provided with positioning holes in a penetrating way at positions corresponding to the slide blocks; positioning parts are arranged in the positioning holes; the sliding ferrule is provided with a plurality of connection holes; the connection holes and the fixing holes are connected with the two ends of elastic elements respectively. By adopting thetest piece clamping device, the problems of insufficient support reliability and low positioning accuracy in a test piece clamping device in the prior art can be solved. The test piece clamping devicehas the advantages of high reliability, low randomness, high universality, easiness in disassembly and assembly, wider pre-clamping force adjusting range and high applicability, and can be flexibly adjusted and assembled according to the size and strength of a test piece.

Description

technical field [0001] The invention relates to a test piece clamping device, in particular to a test piece clamping device for a large-diameter separated Hopkinson compression bar. Background technique [0002] The separate Hopkinson pressure bar device is currently the main test method for testing the dynamic stress-strain response relationship of various engineering materials in the strain rate range from 100 / s to 10000 / s. It can be used in national defense, aviation, aerospace, automobiles, high-speed rail, In the fields of ships, weapons, etc., the test and characterization of the dynamic mechanical properties of materials for structural explosion resistance, impact resistance, collision and lightweight design and analysis requirements. [0003] When testing heterogeneous materials such as concrete, rock, foam, etc., in order to contain enough microstructures, the size of the specimen must be large enough, so a separate Hopkinson compression bar device with a large diam...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a large-diameter split-type Hopkinson pressure rod tester that can solve the problems of insufficient support reliability and low positioning accuracy of the specimen clamping device in the prior art. clamping device

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