Tensile-compression integrated fixture for mechanical creep testing machine

Abstract

The invention discloses a tension-compression integrated clamp for a mechanical creep testing machine, which comprises an upper tension chuck, an adjustment ball head, a lower compression chuck, an upper compression chuck and a lower tension chuck; an upper tension chuck The head and the lower tensile chuck are dumbbell-shaped specimen tensile chucks. The two sides of the tensile chuck are slotted, and the upper tensile chuck is slotted close to the opening of the tensile chuck. A lower compression chuck is set outward. The boss of the lower stretching collet is provided with a boss carrying the upper compression collet outside the slot near the opening of the stretching collet. On the working surface, the working surface of the lower compression chuck has an inwardly concave spherical structure, one side of the adjustment ball head matches the spherical structure on the lower compression chuck, and the other side is a plane; the invention can withstand mechanical creep The tensile creep test and compressive creep test are realized on the testing machine.

Description

technical field [0001] The invention belongs to the technical field of material mechanics research, in particular to a tensile-compression integrated fixture for a mechanical creep testing machine. Background technique [0002] The creep test is one of the important methods to reflect the viscoelastic mechanics of solid materials. The mechanical creep test device uses the gravity of the weight as the load for the creep test, so as to realize the constant load required by the creep test. Although the technology of mechanical creep test equipment has been developed and mature, its creep loading range is limited by the direction of force, so only tensile creep tests can be performed. In the study of viscoelastic mechanics of solid materials, many materials require compression creep tests due to their own structural reasons or mechanical performance requirements. In the literature "A thermo-viscoelastic-viscoplastic-viscodamage constitutive model for asphalt materials" The test...

AI Technical Summary

Problems solved by technology

Although the technology of mechanical creep test equipment has been developed and mature, its creep loading range is limited by the direction of force, and only tensile creep tests can be performed.

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