Damage assessment of cement-based geomaterial during loading by ultrasonic tomography

11th International Conference on Damage Assessment of Structures

物理学;材料科学

Do, Duc-Phi^1 ; Baba, Ndao^1 ; Hoxha, Dashnor^1 ; Bui, Truong-Son^2

Laboratory PRISME, Polytech'Orleans, 8 rue Léonard de Vinci, Orleans Cedex 2

45072, France^1

Department of Engineering Geology, Ha Noi University of Mining and Geology, Viet Nam^2

关键词: Continuous measurements;    Damage assessments;    Damage of materials;    Progressive damage;    Relative amplitude;    Through transmission;    Tomography methods;    Ultrasonic tomography;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/628/1/012031/pdf
DOI  :  10.1088/1742-6596/628/1/012031

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Damage assessment of cement-based geomaterials during loading was conducted in this work by using the through-transmission ultrasound. For this purpose a built up system of ultrasound consisting of 96 channels and the specific sensors allowing to measure at the same time three types of waves (a bulk wave and two shear waves) were used. The continuous measurements enable to assess the damage of material through the constructed image of ultrasonic velocity as well as the attenuation of each wave during loading. The difference tomography method using the differential arrival times or relative amplitudes with respect to the initial stage confirms its efficacy through this work. The results show that all three types of wave can be used to capture the progressive damage in material but the bulk wave seems to be more sensitive than the shear waves.