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An experimental device for simulating materials subjected to alternating cyclic tension and compression loads in a fluid environment

A technique of alternating loads and simulating materials, which is applied to measuring devices, analyzing materials, and testing the strength of materials by applying repetitive force/pulse force, etc. Material corrosion behavior research and other issues, to achieve the effect of simple operation, wide application range and simple device

Active Publication Date: 2019-03-05
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the simulation studies on material corrosion protection focus on a single flow field or stress field, and there is a lack of research on the corrosion behavior of materials under the coupling of multiple fields.
Simulating the fatigue behavior of materials under a single axial cyclic tension and compression load can only obtain the relevant mechanical properties of materials, without considering the serious influence of common factors such as flow field and temperature field on local corrosion of materials
Since the load application method is different from the actual alternate tension and compression load application form, this test method cannot truly reflect the working state of the material when it is subjected to cyclic tension and compression alternate loads in a corrosive medium
Therefore, the obtained data has limited reference significance for actual engineering

Method used

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  • An experimental device for simulating materials subjected to alternating cyclic tension and compression loads in a fluid environment
  • An experimental device for simulating materials subjected to alternating cyclic tension and compression loads in a fluid environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The selected rod-shaped test piece 15 with external thread is an AZ31B rod with a length of 60mm and a diameter of 3mm, and the time relay 9 is a double-cycle time relay; the solenoid valve 10 is a two-position five-way solenoid valve; Miniature double-acting cylinder; the corrosive medium used is simulated body fluid, the temperature is 37°C, the speed of the flow field is controlled by the adjustable speed peristaltic pump 1, the air pressure is adjusted by the air pressure regulating valve 8, and the frequency is adjusted by the time relay 9, then the real human body can be simulated Corrosion fatigue experiments of magnesium alloy implanted devices under corrosive environment and temperature.

Embodiment 2

[0024] The device used is the same as in Example 1. The rod-shaped test piece 15 with an external thread is 60 mm in diameter and a pure magnesium rod with a diameter of 3 mm. The corrosion medium used is a simulated plasma solution, and the temperature is 37 ° C. The speed of the flow field is controlled by the speed-adjustable peristaltic pump 1, the air pressure is adjusted by the air pressure regulating valve 8, and the frequency is adjusted by the time relay 9, so that the alternating tension and compression corrosion fatigue experiment of the rod-shaped specimen in the simulated 37°C human blood environment can be carried out.

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Abstract

The invention discloses an experimental device for simulating the cycle tension and compression alternating load of a material in a fluid environment. According to the experimental device for simulating the cycle tension and compression alternating load of the material in the fluid environment, disclosed by the invention, a cycle tension and compression behaviour of the material in a flowing corrosive medium can be really simulated, the flowing speed of a flow field, the corrosive medium and the experimental temperature during an experiment process are controllable, the size and the frequency of the tension and compression load are adjustable, and the experimental device is suitable for a fatigue corrosion experiment of the material which suffers from the action of the cycle tension and compression alternating load in the flowing corrosive medium; the experimental device is simple in structure, low in cost, simple and convenient in operation and complete in functions, and a scientific and real experimental result can be obtained.

Description

technical field [0001] The invention relates to an experimental device for simulating materials subjected to alternating cyclic tension and compression loads in a fluid environment, which is suitable for simulating the behavior of materials subjected to cyclic tension and compression alternating loads in a flowing corrosive medium, and belongs to the technical field of material protection. Background technique [0002] It is a technical issue that material workers generally pay attention to to simulate the actual working environment of materials, and to evaluate and predict the stress corrosion behavior of materials. In reality, the actual working environment of most materials often has multi-field coupling effects, including the combined effects of flow field, temperature field, and stress field. The cyclic tension and compression alternating stress field acts together. Under the joint action of flow field, alternating load of cyclic tension and compression, and corrosive ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/32G01N3/56G01N17/00
CPCG01N3/32G01N3/56G01N17/00G01N17/006
Inventor 储成林金晶李旋蒋俊白晶郭超薛烽林萍华
Owner SOUTHEAST UNIV