Tension-torsion test specimen fixture

Abstract

The invention discloses a tension-torsion test specimen fixture, which comprises an upper chuck, a lower chuck and a tension-torsion test specimen, the upper chuck and the lower chuck are respectively provided with upper jaws and lower jaws, an upper clamped section of the tension-torsion test specimen is fixed by the upper jaws of the upper chuck, a lower clamped section of the tension-torsion test specimen is fixed by the lower jaws of the lower chuck, the upper clamped section of the tension-torsion test specimen is provided with upper test specimen key slots, the lower clamped section of the tension-torsion test specimen is provided with lower test specimen key slots, the upper jaws of the upper chuck are provided with upper jaw key slots corresponding to the upper test specimen key slots, the lower jaws of the lower chuck are provided with lower jaw key slots corresponding to the lower test specimen key slots, keys are mounted between the upper test specimen key slots and the upper jaw key slots, and keys are mounted between the lower test specimen key slots and the corresponding lower jaw key slots. The tension-torsion test specimen-clamping effect of the jaws of the tension-torsion test specimen fixture is good, the shapes of the clamped sections of the test specimen are not limited, the structure is simple, clamping does not need mechanical power, mechanical operation noise does not exist, the environment cannot be affected, and both the purchase cost and the use cost are low.

Description

technical field [0001] The invention relates to a tension-torsion testing machine, in particular to a test piece and a fixture in the tension-torsion testing machine, and belongs to the technical field of material mechanics testing machines. Background technique [0002] In the field of metal material mechanics experiments, the tensile torsion test is a new thing. The existing tensile torsion test torque is below 50N·m, which can be realized by ordinary tensile test chucks, but if the torque exceeds 200N·m, even When the torque reaches more than 1000N·m, it is easy to slip when the test piece is clamped by the chuck of the existing testing machine. The jaws for clamping metal materials are all made of hard materials and quenched. The contact surface between the jaws and the test piece is processed with various lines (such as straight lines, twill lines, cross lines and other non-slip tooth shapes). The pressure applied by the jaws to the specimen is very small, and when the...

AI Technical Summary

Problems solved by technology

However, the stress state of the specimen in the tensile torsion bidirectional stress test is different from that of the tensile uniaxial stress test. In the tensile torsion test, two forces of torsion and tension act on the specimen at the same time. Therefore, in the current tensile torsion test , it is difficult to unify the shape of the specimen and the effective clamping

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