High cycle fatigue damage and life time prediction for tetragonal ferroelectrics under electromechanical loading
High cycle fatigue damage and life time prediction for tetragonal ferroelectrics under electromechanical loading
复制标题
机电载荷下四方铁电体的高周疲劳损伤和寿命预测
DOI:
10.1016/j.ijsolstr.2015.11.003
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发表时间:
2016
影响因子:
3.6
通讯作者:
A. Ricoeur
中科院分区:
文献类型:
--
作者:
S. Lange;A. Ricoeur
High cycle fatigue is one of the most crucial problems in designing reliable ferroelectric actuators and sensors. On the micro- and mesoscales, fatigue crack growth determines the life time of the smart ceramic devices, being controlled by both mechanical and electric loads. Giving rise to residual stresses, ferroelectric domain switching and domain wall motion mediate between crack tip and external loading. Thus, two dissipative processes have to be modeled on the microscale, finally leading to evolutions of damage as well as macroscopic piezoelectric, dielectric and stiffness properties. A condensed approach is used to solve the nonlinear constitutive problem of a polycrystalline representative volume and an accumulation model is applied to efficiently handle predictions of high cycle loading. Numerical examples help investigating measures to foster the life time of ferroelectric devices, always keeping an eye on the actuating performance of the system.
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DOI:
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2012
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