Test components and test methods for dynamic tensile and shear mechanical parameters of brittle materials

Abstract

The invention discloses a test assembly and a test method for dynamic tension-shear mechanics parameters of brittle materials. The test piece assembly includes an oblique cylinder test piece body and a test piece fixture. The test piece fixture includes an incident rod with a ring disk at one end, a transmission rod and The incident rod joint and the transmission rod joint are respectively connected with the incident rod and the transmission rod through the coupling structure. The specimen body is fixedly clamped between the incident rod joint and the transmission rod joint, and the outer surfaces of the incident rod and the transmission rod are also equipped with strain gauges. . This test method only needs to record the incident strain, reflected strain and transmitted strain in the whole process from the impact to the failure and fracture of the specimen through the data acquisition system of the Hopkinson tension rod device, so as to calculate the tensile force of the brittle material during dynamic loading. Stress and shear stress and other mechanical parameters can provide effective data support for the study of mechanical properties of brittle materials, so it has strong practicability.

Description

technical field [0001] The invention belongs to the technical field of material mechanical performance testing, and in particular relates to a dynamic tension-shear mechanical parameter testing component and testing method of brittle materials. Background technique [0002] In engineering fields such as civil engineering, water conservancy, machinery, transportation, mining, and aerospace, brittle materials such as concrete, rock, and ceramics are subjected to dynamic loads such as impact or blast loads. The mechanical behavior of materials under dynamic loads is very different from that under static loads, and due to the complex stress conditions of engineering components, materials are often in a composite stress state of tension, compression and shear. For brittle materials, they usually have high compressive strength, but poor bearing capacity for tensile and shear loads. In actual working conditions, they are often damaged when subjected to the combined tension-shear ac...

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Problems solved by technology

[0004] Aiming at the above-mentioned problems of the existing brittle material dynamic tensile-shear bearing capacity test device with complex structure, high manufacturing difficulty and poor practicability, the purpose of the present invention is to provide a brittle material dynamic tensile-shear mechanical parameter test assembly with simple structure and easy manufacture , in order to realize the dynamic tensile and shear bearing capacity test of brittle materials

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