Numerical and experimental analyses of singular electro-elastic fields around a V-shaped notch tip in piezoelectric materials

作者：Chen Meng Cheng^*; Ping Xue Cheng; Xie Hui Min; Liu Zhan Wei

来源：Engineering Fracture Mechanics, 2008, 75(18): 5029-5041.

DOI：10.1016/j.engfracmech.2008.05.011

• Piezoelectric material
• V-shaped notch tip
• Singular electroelastic field
• Hybrid element method
• Moire interferometry experiment

A super V-shaped notch tip element that Simulates electro-elastic behavior near a V-shaped notch tip is first developed based on one-dimensional finite element eigensolutions. The present element is then incorporated with standard four-node hybrid electro-elastic field elements to calculate electro-elastic singularity orders, singular strain distributions and generalized stress intensity factors ahead of V-shaped notch tips in three-point-bending piezoelectric specimens with notch angles alpha = 0 degrees, 30 degrees, 60 degrees, and 90 degrees, respectively. The present numerical solutions are compared with those obtained from the moire interferometry experiment technique. Finally, the effect of the V-shaped notch angle and electric field on singular electro-elastic fields is also discussed.

• 出版日期2008-12
• 单位清华大学; 华东交通大学