A structure state evaluation method based on electric-thermo-acoustic effect for tension materials

作者：Yin, Aijun^*; Zhang, Panpan; Ouyang, Qi

来源：Japanese Journal of Applied Physics, 2016, 55(10): 106701.

DOI：10.7567/JJAP.55.106701

• TIO2 ANATASE ELECTRODES
• SOUND GENERATION
• POROUS SILICON
• ACCUMULATION
• EMISSION
• GRAPHENE
• TRANSPARENT
• PROTRUSIONS
• DEVICES

The material properties of a structure will change over the course of its service life. Monitoring for material properties can be used to evaluate equipment state. Characterising and tracking variations in properties have promising potential for the detection and evaluation of material state caused by fatigue or residual stress. Theoretical analysis for the formation of a thermo-acoustic effect is carried out and it reveals a kind of interaction between the resonance of gas heat and that of solid heat. This paper introduces an electric-thermo-acoustic model with a multi-layered structure and analyses the effects of the material properties on sound pressure. Based on this effect, a method for evaluating the performance of a multi-layered structure material is proposed that can be used to assess a greater number of physical properties than the existing approaches. The simulations and experiments with variations in material property are generated and processed with the proposed model, and the results verify the method's efficiency.

• 出版日期2016-10
• 单位重庆大学; 机械传动国家重点实验室