Creating buckling-induced wavy or coiled architecture is a successful route to realize high performance of stretchable piezoelectric devices. However, a systematic analysis of the relationship between piezoelectric potential output, mechanical stress and buckling parameters is still lacking. Here, we quantitatively analyze the piezoelectric and mechanical performance of buckled poly(vinylidene fluoride) (PVDF) nanofibers with respect to the buckling architecture and different force loading using finite element simulation. Our results show that decrease in the buckling angle, arc radius and cross section diameter can increase the piezoelectric potential output of a buckled PVDF nanofiber, and increase in buckling cycles is an efficient way to reduce the mechanical stress on the nanofiber. Besides, a relative stable piezoelectric effectiveness can be obtained when the buckling angle is between 60° and 90°. This research helps to identify an optimized design principle for realizing high stretchability and piezoelectric performance of buckled nanofibers, and provides theoretical support for future applications of buckled PVDF in flexible electronic devices.

中文翻译：

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用于设计高度可拉伸电子器件的屈曲聚（偏二氟乙烯）纳米纤维的压电和机械响应的数值分析

创建屈曲诱导的波浪形或盘绕结构是实现可拉伸压电设备高性能的成功途径。然而，仍然缺乏对压电电位输出、机械应力和屈曲参数之间关系的系统分析。在这里，我们使用有限元模拟定量分析了屈曲聚偏二氟乙烯 (PVDF) 纳米纤维在屈曲结构和不同力载荷方面的压电和机械性能。我们的结果表明，屈曲角、圆弧半径和横截面直径的减小可以增加屈曲 PVDF 纳米纤维的压电电位输出，并且屈曲周期的增加是减少纳米纤维上机械应力的有效方法。除了，当屈曲角在60°和90°之间时可以获得相对稳定的压电效应。该研究有助于确定实现弯曲纳米纤维的高拉伸性和压电性能的优化设计原理，并为弯曲 PVDF 在柔性电子设备中的未来应用提供理论支持。