中文摘要：

运用连续损伤理论，提出了两种预测压电断裂载荷的模型．模型1以力损伤扩展力作为依据；模型2则以力电损伤扩展力的线性组合作为依据．分析发现，模型2预测的断裂载荷比模型1标准差更小，因此力电损伤扩展力对断裂都有影响．从模型2的参数中可以看出，力损伤扩展力比电损伤扩展力对压电断裂的影响更大．

英文摘要：

Two models were proposed to predict piezoelectric fracture loads by using the continuum damage theory. Model 1 was built in accordance with the mechanical damage extension force and mode 2 was set up on the basis of a linear combination of the mechanical and the electrical damage extension forces. The analysis showed that the fracture load predicted by mode 2 possessed fewer deviations than mode 1 did. On the basis of the analysis, the mechanical and electrical damage extension forces had influence on fracture. In accordance with the parameters from model 2, it was shown that the mechanical damage extension force had more influence on a piezoelectric fracture process than the electrical damage extension force did.