标题： 机电耦合系数：研究负泊松比压电能量收集器的新方法 显示英文标题

标题： Electromechanical Coupling Coefficient: New Approach to Study Auxetic Piezoelectric Harvesters

摘要： 这项工作介绍了一种新方法，以评估压电能量收集器（PEHs）的性能，从而研究其辅助增强的可能性。为此，提出了一种新的方法来评估压电层的固有有效机电耦合系数（EMCC）。由于当前的评估方法在共振暴露下受到质疑，因此提出了理论模型，以说明所收集的功率将依赖于哪些特性。引入了一个二维图，以实现不同PEHs的比较。该方法最终应用于具有不同基板类型的PEHs：填充型、空心型和辅助型。初步结果表明，通常情况下，辅助结构可能不会增加固有EMCC，而只会提高压电层中的弹性能比。 显示英文摘要

摘要： This work introduces a novel methodology to assess the performance of Piezoelectric Energy Harvesters (PEHs) in order to study auxetic enhancement possibilities. For this purpose, a new approach for evaluating the intrinsic effective Electromechanical Coupling Coefficient (EMCC) of piezoelectric layers is presented. As the current assessment methods are questioned under resonance exposures, theoretical models are presented to suggest what characteristics the harvested power will depend on. A two axis graph is introduced to enable the comparison of different PEHs. The method is finally applied to PEHs with different types of substrates: filled, hollow and auxetic. First results show that, generally, auxetic structures might not increase the intrinsic EMCC but only improve the elastic energy ratio in the piezoelectric layers.