Dielectric Elastomer Generators: How Much Energy Can Be Converted?
Dielectric Elastomer Generators: How Much Energy Can Be Converted?
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DOI：
10.1109/tmech.2010.2089635
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发表时间：
2011-02-01
影响因子：
6.4
通讯作者：
Suo, Zhigang
中科院分区：
文献类型：
--
作者：
Koh, Soo Jin Adrian;Keplinger, Christoph;Suo, Zhigang
介电弹性体被开发为发电机，以从可再生资源（如人类运动和海浪）中获取能量。我们将发电机建模为两个自由度的系统，表示在应力-拉伸平面或电压-电荷平面上。在这样的平面中的点表示发电机的状态，曲线表示操作路径，轮廓表示操作循环，并且由轮廓包围的面积表示每个循环的转换能量。每种破坏机制都由平面上的曲线表示。所有已知的破坏力学的曲线都包围着容许状态的范围。该区域的面积定义了最大转换能量。本研究包括以下失效机制：材料断裂、张力损失、电击穿和机电不稳定性。结果发现，天然橡胶优于VHB弹性体作为发电机在应变小于15%。此外，通过改变材料参数，转换能量可以增加到1.0 J/g以上。
Dielectric elastomers are being developed as generators to harvest energy from renewable sources, such as human movements and ocean waves. We model a generator as a system of two degrees of freedom, represented on either the stress-stretch plane or the voltage-charge plane. A point in such a plane represents a state of the generator, a curve represents a path of operation, a contour represents a cycle of operation, and the area enclosed by the contour represents the energy of conversion per cycle. Each mechanism of failure is represented by a curve in the plane. The curves of all the known mechanics of failure enclose the region of allowable states. The area of this region defines the maximum energy of conversion. This study includes the following mechanisms of failure: material rupture, loss of tension, electrical breakdown, and electromechanical instability. It is found that natural rubber outperforms VHB elastomer as a generator at strains less than 15%. Furthermore, by varying material parameters, energy of conversion can be increased above 1.0 J/g.