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This paper studies the influence of partial discharge (PD) on crack propagation in piezoelectric materials under combined mechanical and electric loads. According to Stroh formalism, the electric field is obtained based on the semi-permeable electrical boundary condition inside the crack. Then, the crack propagation effects of the electric field without PD are discussed through considering the contribution...
This paper studies the electric breakdown problem of a semi-permeable crack in piezoelectric material under combined mechanical and electric loads. According to Stroh formalism, the differences of the electric potential and the displacement of the crack are first derived and the quadratic equation containing the electric displacement inside the crack is obtained. Meanwhile, the electric field is also...
High-intensity focused ultrasound (HIFU) is a non-invasive method of solid tissue ablation therapy. However, only a few studies have reported the effect of HIFU for unresectable pancreatic cancer. This study aimed to evaluate the clinical benefits, survival time and complications associated with the use of HIFU ablation in patients with unresectable pancreatic cancer. Twenty-five patients with...
The shock test and numerical analysis of the support-model including model design, layout of the sensor is presented in this paper. The governing equations of a thin cylindrical shell within the framework of the Flugge thin shell theory and the related Hamilton variation method have been derived. Set up a linear finite element model consistent with experiment model to calculate the dynamics response...
The structure-borne sound in transmission always falls across obstructs, for example, supporting parts, tie-in and blocking mass. These obstructs could induce the impedance mismatch of the structure, reflecting and restraining the structure-borne sound, and thereby isolating the elastic waves. The impedance mismatch theory is firstly expatiated using the wave approach to make know that the more change...
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