Dynamic torsional fatigue mechanical property test device in tensile preload

Abstract

The invention relates to a dynamic torsional fatigue mechanical property testing device under tensile preload, which belongs to the technical field of precision instruments. Horizontal arrangement is adopted, including tensile unit, torsional fatigue unit, force signal and displacement signal detection unit, and specimen clamping unit. On the same axis; the tensile unit, the torsional fatigue unit, the force signal and displacement signal detection unit and the specimen clamping unit are all installed on the bottom plate; the magnetic field and thermal field loading are placed between the tensile unit and the torsional fatigue unit, Realize the coupled loading of force, heat and magnetism. The advantages are that the testing precision is high, the structure is relatively simple, and it is easy to implement. It can realize the combined loading of tensile, torsional fatigue and torsional fatigue under tensile preload; it can realize the coupling loading of force, electricity, heat and magnetism; it can observe the microstructural changes such as crack growth and other microstructural changes of materials under torsional fatigue in real time.

Description

technical field [0001] The invention relates to the field of precision scientific instruments in the field of material micromechanical performance testing, in particular to a dynamic torsional fatigue mechanical performance testing device under tensile preload. The instrument can be integrated with optical microscope and electrothermal magnetic field, which provides an effective method for studying the failure mechanism and crack propagation of torsional fatigue materials under tensile preload. Background technique [0002] The development of materials has greatly promoted the progress of society, but at the same time, with the advancement of science and technology, human beings have higher and higher requirements for the use of materials, and the conditions of use have become more and more complicated. Although material science and technology are developing rapidly, the current main research areas are focused on the development and application of new materials. The developm...

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Problems solved by technology

Therefore, it is difficult to guarantee the reliability of components in structural design based on the mechanical parameters measured under a single load.

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