CN-121978156-A - Ceramic material thermal stability detection method and system

CN121978156ACN 121978156 ACN121978156 ACN 121978156ACN-121978156-A

Abstract

The invention relates to the technical field of material detection and discloses a ceramic material thermal stability detection method and system, wherein the method comprises the steps of applying a stepped temperature load to a ceramic material, synchronously collecting time sequence temperature distribution data, performing thermal conduction phase decoupling on the time sequence temperature distribution data, separating asynchronous thermal response, generating dynamic thermal stress characteristics, performing thermoacoustic elastic coupling on the dynamic thermal stress characteristics, quantifying the microcrack release rate of a thermal stress gradient value after thermoacoustic elastic coupling, generating critical damage judging parameters, performing space topology analysis on the critical damage judging parameters, establishing a stress field intensity connection path, generating a crack penetrability evolution track, performing geometric configuration matching on the crack penetrability evolution track and a preset material failure space mode library, and outputting a cascading thermal collapse early warning signal; the invention solves the problems of multidimensional sensing and early warning of the internal damage evolution process of the ceramic material under dynamic thermal load.

Inventors

Meng Dongkun
LIU ZHIGAO
KONG LIANG

Assignees

河南纳腾能源科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260407

Claims (10)

1. A method for detecting thermal stability of a ceramic material, the method comprising: s1, applying a stepped temperature load to a ceramic material, and synchronously collecting time sequence temperature distribution data of the ceramic material; S2, performing thermal conduction phase decoupling on the time series temperature distribution data, and separating asynchronous thermal response of the ceramic material to generate dynamic thermal stress characteristics of the ceramic material; s3, performing thermoacoustic elastic coupling on the dynamic thermoacoustic stress characteristics, and quantifying the microcrack release rate of the thermoacoustic stress gradient value after thermoacoustic elastic coupling to generate critical damage judgment parameters of the ceramic material; S4, carrying out space topology analysis on the critical damage judging parameters, establishing stress field intensity connection paths of adjacent damage points in the ceramic material, and generating crack penetrability evolution tracks of the ceramic material; S5, performing geometric configuration matching on the crack penetrability evolution track and a preset material failure space mode library, and outputting a cascade type thermal collapse early warning signal of the ceramic material.
2. The method for detecting thermal stability of ceramic material according to claim 1, wherein the step-type temperature load is applied to the ceramic material and time-series temperature distribution data of the ceramic material are synchronously acquired, comprising: Arranging a temperature sensing array on the surface and inside of the ceramic material; the temperature sensing array comprises a thermal infrared imager and a buried thermocouple; And carrying out temperature rise and reduction conversion on the thermal infrared imager and the embedded thermocouple based on a preset constant rate, applying a stepped temperature load on the ceramic material, and synchronously collecting time sequence temperature distribution data of the ceramic material.
3. The method of claim 1, wherein said thermally conducting phase decoupling said time series temperature profile data and separating asynchronous thermal responses of said ceramic material to generate dynamic thermal stress characteristics of said ceramic material comprises: Performing short-time Fourier transform on a temperature time curve of each measuring point in the time sequence temperature distribution data, wherein the temperature change waveform of a heating source of the time sequence temperature distribution data; Extracting phase lag angles of the heating source temperature change waveform to obtain a phase lag component set of the ceramic material; Based on theoretical thermophysical parameters of the ceramic material, carrying out deviation quantification on the expected heat conduction phase effect and the phase lag component of each measuring point to obtain a response value deviation value of the ceramic material; and extracting the thermal stress characteristics of the ceramic material based on the time change rule of the response value deviation and the elastic modulus of the ceramic material to obtain the dynamic thermal stress characteristics of the ceramic material.
4. The method for detecting the thermal stability of a ceramic material according to claim 1, wherein the thermo-acoustic elastic coupling comprises: Synchronously acquiring acoustic emission signal time sequence data of the ceramic material in the process of applying the stepped temperature load; Aligning the dynamic thermal stress characteristic with the time sequence data of the acoustic emission signal in a time coordinate system, and calculating a coherence function value between the dynamic thermal stress characteristic and a corresponding frequency component in the acoustic emission signal; And performing thermoacoustic elastic coupling on the dynamic thermal stress characteristic based on the coherence function value to obtain a thermal stress gradient value of the ceramic material.
5. The method for detecting the thermal stability of a ceramic material according to claim 1, wherein the calculation formula of the critical damage judgment parameter is: Wherein, the For the critical damage determination parameter(s), As a function of the time variable, As a function of the thermal stress gradient value over time, As a function of the acoustic emission signal of the ceramic material over time, For the thermal damage relaxation coefficient of the ceramic material, The starting time generated for the dynamic thermal stress feature, For the end of the heat-loaded step, For the critical strain energy release rate of the ceramic material, Is an exponential function.
6. The method for detecting thermal stability of ceramic material according to claim 1, wherein the performing spatial topology analysis on the critical damage determination parameter comprises: mapping the critical damage determination parameters to three-dimensional space grid nodes of the ceramic material; constructing a three-dimensional isosurface of the ceramic material based on node values of the three-dimensional space grid nodes; And carrying out three-dimensional space node aggregation on the three-dimensional isosurface to generate a candidate damage communication region of the ceramic material.
7. The method for detecting thermal stability of ceramic material according to claim 6, wherein said establishing a stress field strength connection path between adjacent damage points in said ceramic material comprises: selecting node pairs of the three-dimensional space grid nodes in the candidate damage communication area; estimating the stress intensity factor variation of the node pair based on the critical damage judging parameter; And if the variation of the stress intensity factor exceeds the fatigue crack growth threshold of the ceramic material, determining high probability damage communication of the node pair, and constructing a stress field intensity connection path of adjacent damage points in the ceramic material.
8. The method for detecting thermal stability of ceramic material according to claim 7, wherein generating crack-penetrating evolution trajectories of the ceramic material comprises: abstracting the stress field intensity connection path into a weighted graph; Carrying out graph theory analysis on the weighted graph, and calculating the intermediacy of all nodes in the weighted graph; Based on the edges of the strong connection paths, carrying out key priority search on the key pivot nodes to obtain key connected subgraphs of the key pivot nodes; and carrying out three-dimensional material space mapping on the key connected subgraph to generate a main crack through path of the ceramic material, and determining the main crack through path as the crack penetrability evolution track.
9. The method for detecting thermal stability of ceramic material according to claim 1, wherein the geometric configuration matching between the crack penetration evolution track and a preset material failure space mode library is performed, and a cascade thermal collapse early warning signal of the ceramic material is output, and the method comprises the following steps: Extracting geometric features of the crack penetrability evolution track to generate a multi-scale shape descriptor; Based on a preset material failure space mode library, similarity calculation is carried out on the multi-scale shape descriptors, and a similarity result of the multi-scale shape descriptors is obtained; Selecting a typical failure crack mode with the highest similarity result as a matching result; and performing differential matching on the typical failure mode of the matching result and the known failure result of the crack penetration evolution track to generate a cascade thermal collapse early warning signal of the ceramic material.
10. A ceramic material thermal stability detection system for implementing a ceramic material thermal stability detection system according to any one of claims 1-9, said system comprising: The thermal loading control module is used for applying a stepped temperature load to the ceramic material and synchronously collecting time sequence temperature distribution data of the ceramic material; The thermal response decoupling module is used for performing thermal conduction phase decoupling on the time series temperature distribution data, separating asynchronous thermal response of the ceramic material and generating dynamic thermal stress characteristics of the ceramic material; The coupling damage quantification module is used for carrying out thermoacoustic elastic coupling on the dynamic thermoacoustic stress characteristics, quantifying the microcrack release rate on the thermoacoustic stress gradient value after the thermoacoustic elastic coupling, and generating critical damage judgment parameters of the ceramic material; The damage topology evolution module is used for carrying out space topology analysis on the critical damage judging parameters, establishing a stress field intensity connection path of adjacent damage points in the ceramic material and generating a crack penetrability evolution track of the ceramic material; and the failure early warning module is used for carrying out geometric configuration matching on the crack penetrability evolution track and a preset material failure space mode library and outputting a cascade type thermal collapse early warning signal of the ceramic material.

Description

Ceramic material thermal stability detection method and system Technical Field The invention relates to the technical field of material detection, in particular to a method and a system for detecting thermal stability of a ceramic material. Background In the prior art, the detection method of the thermal stability of the ceramic material mostly depends on a single, constant or simple linear temperature loading mode, and a gentle and uniform temperature change path is difficult to effectively simulate dynamic loads such as temperature impact, cyclic thermal fatigue and the like borne by the material in a practical complex thermal environment, so that the excitation efficiency of potential defects, microstructure mismatch and early-stage thermal damage in the material is low. The detection process is time-consuming and long, weak links and failure precursors of the thermal stability of the materials cannot be sensitively exposed in a short test period, so that the timeliness of the evaluation result is insufficient, and the engineering early warning value is limited. Existing detection techniques have limitations in the process signal monitoring and analysis dimensions. Most methods focus on the isolated monitoring and threshold comparison of temperature or final macroscopic performance, and lack the capability of carrying out multi-physical field synchronous sensing and deep fusion analysis on the whole process from dynamic initiation and expansion to penetration of microscopic damage in the material under the action of thermal load. Synchronous and accurate acquisition and association analysis of key process signals such as a temperature field and acoustic emission are difficult to realize, and the evolution track of the crack cannot be deduced based on the spatial topological relation of the damage parameters and is intelligently matched with a typical failure mode. Therefore, development of a detection method and a detection system capable of integrating multiple physical field signals for coupling analysis and realizing damage space evolution deduction and intelligent pattern matching are needed to realize advanced early warning and accurate diagnosis of a ceramic material thermal failure process. Disclosure of Invention The invention provides a method and a system for detecting the thermal stability of a ceramic material, and mainly aims to solve the problems in the background technology. In order to achieve the above object, the present invention provides a method for detecting thermal stability of a ceramic material, comprising: s1, applying a stepped temperature load to a ceramic material, and synchronously collecting time sequence temperature distribution data of the ceramic material; S2, performing thermal conduction phase decoupling on the time series temperature distribution data, and separating asynchronous thermal response of the ceramic material to generate dynamic thermal stress characteristics of the ceramic material; s3, performing thermoacoustic elastic coupling on the dynamic thermoacoustic stress characteristics, and quantifying the microcrack release rate of the thermoacoustic stress gradient value after thermoacoustic elastic coupling to generate critical damage judgment parameters of the ceramic material; S4, carrying out space topology analysis on the critical damage judging parameters, establishing stress field intensity connection paths of adjacent damage points in the ceramic material, and generating crack penetrability evolution tracks of the ceramic material; S5, performing geometric configuration matching on the crack penetrability evolution track and a preset material failure space mode library, and outputting a cascade type thermal collapse early warning signal of the ceramic material. In a preferred embodiment, the step-type temperature load is applied to the ceramic material, and the time-series temperature distribution data of the ceramic material is synchronously acquired, including: Arranging a temperature sensing array on the surface and inside of the ceramic material; the temperature sensing array comprises a thermal infrared imager and a buried thermocouple; And carrying out temperature rise and reduction conversion on the thermal infrared imager and the embedded thermocouple based on a preset constant rate, applying a stepped temperature load on the ceramic material, and synchronously collecting time sequence temperature distribution data of the ceramic material. In a preferred embodiment, said thermally conducting phase decoupling of said time series temperature profile data and separating the asynchronous thermal response of said ceramic material, generating dynamic thermal stress characteristics of said ceramic material, comprises: Performing short-time Fourier transform on a temperature time curve of each measuring point in the time sequence temperature distribution data, wherein the temperature change waveform of a heating source of the time sequence temperature