Conductive solid nondestructive detection circuit and continuous stress quantitative evaluation method based on conductive solid nondestructive detection circuit

Abstract

The invention discloses a conductive solid nondestructive detection circuit and a continuous stress quantitative evaluation method based on the conductive solid nondestructive detection circuit. The method comprises the following steps: acquiring nondestructive detection signals through a conductor nondestructive detection circuit; conducting quantitative evaluation on the continuous stress distribution of the conductive solid by an experiment and numerical simulation combined mode; specifically, determining the relation between the nondestructive detection signals and external loads through experiments; acquiring the distribution law of conductivity through the piezoresistive effect, and acquiring the relation between continuous stress distribution and the external loads through a numerical calculation model; and acquiring the stress of any one point of the conductor according to the estimated magnitude of the external force, thereby realizing quantitative evaluation of the continuous stress distribution of the conductive solid. The method disclosed by the invention lays the foundation for early damage prediction of the conductive solid, can be used for realizing fitness prediction of conductor and semiconductor key members, and is of great importance in guaranteeing the safety of key structures.

Description

technical field [0001] The invention belongs to the field of non-destructive detection of conductive solid stress, in particular to a continuous stress detection technology. Background technique [0002] As a common component in engineering practice, (semi)conductive solid components are widely used in key equipment in many engineering fields such as transportation, aerospace, nuclear energy, and electric power. Their safety and durability have an important impact on the performance of key equipment. However, (semi) conductive solid components will inevitably produce processing residual stress in the manufacturing process under the condition of cold working, and will produce welding residual stress and stress concentration in the installation process. The non-uniform stress distribution of the above (semi) conductive solid components will affect the performance and safety of metal components: on the one hand, the non-uniform distribution of stress will lead to non-negligible...

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