TY - JOUR
T1 - Multiple surface cracks in a piezoelectric layer bonded to an elastic substrate under transient electromechanical loads
AU - Wang, Bao-Lin
AU - Mai, Yiu-Wing
PY - 2007
Y1 - 2007
N2 - Piezoelectric materials are usually bonded to elastic substrates to form so-called smart material structures that are capable of sensing and actuating in a controlled manner in response to a stimulus. Such smart structures are often operated at transient electromechanical environments. In this paper, the problem of a periodic array of surface cracks in a piezoelectric layer bonded to an elastic substrate subjected to transient electromechanical loads is studied. A system of singular integral equations is formulated in terms of the crack surface displacement and electric potential. Numerical results include the time-dependent stress and electric displacement intensity factors. Effects of crack spacing and electromechanical coupling on the crack tip field intensity factors are investigated in details. Numerical examples are given for a single piezoelectric layer and a piezoelectric layer bonded to an elastic substrate, subjected to independent mechanical and electrical impact loads. Some useful conclusions are given.
AB - Piezoelectric materials are usually bonded to elastic substrates to form so-called smart material structures that are capable of sensing and actuating in a controlled manner in response to a stimulus. Such smart structures are often operated at transient electromechanical environments. In this paper, the problem of a periodic array of surface cracks in a piezoelectric layer bonded to an elastic substrate subjected to transient electromechanical loads is studied. A system of singular integral equations is formulated in terms of the crack surface displacement and electric potential. Numerical results include the time-dependent stress and electric displacement intensity factors. Effects of crack spacing and electromechanical coupling on the crack tip field intensity factors are investigated in details. Numerical examples are given for a single piezoelectric layer and a piezoelectric layer bonded to an elastic substrate, subjected to independent mechanical and electrical impact loads. Some useful conclusions are given.
KW - fracture mechanics
KW - piezoelectric materials
UR - http://handle.westernsydney.edu.au:8081/1959.7/uws:47056
U2 - 10.1016/j.mechmat.2006.08.009
DO - 10.1016/j.mechmat.2006.08.009
M3 - Article
SN - 0167-6636
VL - 39
SP - 564
EP - 579
JO - Mechanics of Materials
JF - Mechanics of Materials
IS - 6
ER -