Dynamic torsional fatigue mechanical property test device in tensile preload

Abstract

The invention relates to a dynamic torsional fatigue mechanical property test device in a tensile preload, and belongs to the technical field of a precise instrument. The test device is in horizontalarrangement and comprises a tensile unit, a torsional fatigue unit, a force signal and displacement signal detecting unit and a test piece clamping unit, wherein the tensile unit and the torsional fatigue unit are respectively arranged at two sides of test pieces, and are positioned on the same axial line as the test pieces; the tensile unit, the torsional fatigue unit, the force signal and displacement signal detecting unit and the test piece clamping unit are all arranged on a bottom plate; a magnetic field and a heat field are loaded between the tensile unit and the torsional fatigue unit for realizing the force thermomagnetic coupling loading. The dynamic torsional fatigue mechanical property test device has the advantages that the test precision is relatively high; the structure is relatively simple; the realization is easy; the torsional fatigue compound loading under the tensile and torsional fatigue and the tensile preload can be realized; the thermomagnetic coupling loading ofthe force can be realized; the microstructure change such as crack extension during the torsional fatigue bearing of a material can be observed 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...

AI Technical Summary

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.

Images