Title :
Numerical field intensity factor calculations for 1-3 piezocomposite structures
Author :
Closset, Etienne ; Trompette, Phillipe ; Birer, Alain ; Cathignol, Dominique
Author_Institution :
French Nat. Inst. of Health & Med. Res., Lyon
fDate :
11/1/2006 12:00:00 AM
Abstract :
The 1-3 piezocomposite transducers used in specific medical applications-as lithotripsy-must be excited by intense electrical impulses. By inference, the composite material is subjected to high-stress levels. To explain possible failure, a numerical tool for analyzing singular two- and three-dimensional stress fields in piezocomposite structures is proposed. Following a finite-element iterative method, singularity parameters values and intensity factors for the mechanical stresses and the electrical field are computed in several bimaterial configurations. The finite-element analysis uses commercial software
Keywords :
composite materials; finite element analysis; piezoelectric materials; piezoelectric transducers; stress effects; 1-3 piezocomposite structures; 1-3 piezocomposite transducers; finite-element iterative method; high-stress levels; intense electrical impulses; mechanical stresses; numerical field intensity factor calculations; three-dimensional stress field; two-dimensional stress field; Biomedical acoustics; Biomedical imaging; Biomedical transducers; Ceramics; Electric shock; Finite element methods; Lithotripsy; Piezoelectric transducers; Stress; Ultrasonic imaging;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2006.154
