An in-situ detection platform for simulating multi-field coupled environments

Abstract

The invention discloses an in-situ detection platform for simulating a multi-field coupling environment, including a variable voltage governor, a time relay, a stress loading device, a stress sensor, a stress loading fixture, a specimen support fixture, a flow field loading device, a corrosion medium supply device, temperature control device, reaction vessel, electrochemical workstation, flow controller, proportional valve and computer, the variable pressure governor and the time relay are used to control the stress loading device, and the stress sensor is used In detecting the size of the load, the flow controller, the flow field loading device, the corrosive medium supply device and the reaction vessel are circularly connected, and the proportional valve is connected to the variable pressure governor for Synchronous regulation between the flow rate and the loaded load is realized, and the electrochemical workstation is used to detect the impedance of the test piece. The invention can be used for real simulating material subjected to joint action of corrosive medium in specific temperature flow field and cyclic bending load and real-time in-situ quantitative characterization thereof.

Description

technical field [0001] The invention relates to an in-situ detection platform for simulating a multi-field coupling environment, and belongs to the technical field of material detection. Background technique [0002] To truly, accurately and quantitatively characterize the corrosion behavior of materials or structural parts under stress is a technical issue that material workers generally pay attention to. In reality, most materials or structural parts are often subjected to multi-field coupling during service, including the joint action of flow field, temperature field, stress field and chemical field. For example, offshore platforms are usually subject to the joint action of flow field, stress field and seawater Another example is that orthopedic fixation devices are jointly affected by the flow field formed by body fluids and the cyclic stress field imposed by external movements during the internal service process. Under the joint action of flow field, stress field and c...

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Problems solved by technology

[0003] At present, the simulation research on material corrosion protection mostly focuses on the effect of a single field, and there is a lack of research on the corrosion behavior of materials under the coupling effect of multiple fields.

The multi-field coupling can be achieved to a certain extent through the corrosion fatigue testing machine, but the fatigue testing machine is mostly used for tension and compression fatigue experiments, which requires high equipment requirements, and it is difficult to perform real-time in-situ quantitative characterization of the corrosion behavior of materials

In fact, most structural parts such as structural beams are subjected to cyclic bending loads during service, and the above experiments cannot reflect the actual load state.

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