In-situ detection platform simulating multifield coupling environment

Abstract

The invention discloses an in-situ detection platform simulating a multifield coupling environment. The in-situ detection platform comprises a variable voltage controller, a time relay, a stress loading device, a stress detector, a stress applying clamp, a specimen support clamp, a flow field loading device, a corrosive medium supply device, a temperature control device, a reaction vessel, an electrochemical workstation, a flow controller, proportional valve and a computer, wherein the variable voltage controller and the time relay are used for controlling the stress loading device; the stressdetector is used for detecting the magnitude of load; the flow controller, the flow field loading device, the corrosive medium supply device and the reaction vessel are circularly connected one another; the proportional valve and the variable voltage controller are connected for realizing synchronous adjustment and control between the flow rate and applied load; and the electrochemical workstation is used for detecting the impedance of a specimen. The in-situ detection platform can be used for truly simulating a condition that a material is subjected to combined action of a specific-temperature flow field corrosive medium and a circulating bending load and performing real-time in-situ quantitative characterization.

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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