In-Plane Deformation Mechanics for Highly Stretchable Electronics

Scissoring in thick bars suppresses buckling behavior in serpentine traces that have thicknesses greater than their widths, as detailed in a systematic set of analytical and experimental studies. Scissoring in thick copper traces enables elastic stretchability as large as approximate to 350%, corresponding to a sixfold improvement over previously reported values for thin geometries (approximate to 60%).</p

Shear deformation dominates in the soft adhesive layers of the laminated structure of flexible electronics

Flexible electronics has attracted much attention in recent years due to the favorable applications to many emerging devices. A novel laminated structure for a new-generation of flexible electronics is composed of several thin layers where the hard functional components are built glued by soft adhesives. To prevent the premature mechanical failure and to achieve the best performance of the electronics the structural design of such a laminate is of crucial importance. Accordingly it is necessary to establish an analytic model to accurately describe the mechanical behavior of the laminated structure. The available models fall into two categories: those only taking into account the normal strain-induced deformation of the soft adhesive layers and those only incorporating the shear deformation of the same layers. This paper aims to quantitatively figure out which deformation dominates. By establishing an accurate enough analytic model a significant finding is revealed that shear deformation dominates in the soft adhesive layers of the laminated structure of flexible electronics while the normal strain-induced deformation is negligible. The model is Well validated by the finite element method (FEM). The effects of the membrane energy and bending energy of the soft layer are also investigated by incorporating or neglecting the shear energy. The model accurately captures the key quantities such as the strain distribution in each layer and the locations of the neutral mechanical planes of the top and bottom layers. This work is expected to provide the design guidelines for the laminated structure-based flexible electronics. (C) 2016 Elsevier Ltd. All rights reserved.</p

一种测量压电器件开路电压的装置和方法

本发明公开一种测量压电器件开路电压的装置,其能够准确测量压电器件受到周期载荷时产生的开路电压，电路原理简单，经济实用。其包括场效应管、第一开关、第二开关、第三开关、第一直流电源、第二直流电源、万用表，第一支路上所测量压电器件与第一开关串联，第二支路上是第二开关，第三支路上第二直流电源与第三开关串联，第一、二、三支路并联，第二直流电源的负极连接场效应管的源极，第三开关的一端连接场效应管的栅极，场效应管的源极、万用表的电流档、第一直流电源、场效应管的漏极串联在一起。还提供了使用方法

一种仿鱼鳞结构太阳能电池及其制备方法

本发明提供了一种仿鱼鳞结构太阳能电池，包括可伸展柔性电路板及重叠放置并固定在其上面的阵列排列的太阳能电池片，所述可伸展柔性电路板为镂空的岛桥结构，桥为曲线形，桥宽与厚度尺寸相近。相比已经产业化的柔性薄膜太阳能电池产品，本发明不仅可以弯曲，还可以伸展。相比目前关于可伸展太阳能电池的一些研究，本发明在伸展前后都几乎是100％的面积能够光伏发电

一种可伸展的柔性电极及其制备方法

本发明提供了一种可伸展的柔性电极，所述电极为镂空的岛桥结构的导电橡胶片，桥为曲线形，桥宽与厚度尺寸相近。本发明通过镂空的岛桥结构使导电橡胶片的伸展性得到显著提高，使其可以更好地贴合皮肤的变形并保持良好的导电性能

一种双面电阻式应变传感器及应变测量方法

本发明提供了一种双面电阻式应变传感器，具有曲线形电阻结构，能够精确测量较大量程范围的应变，同时，该应变传感器在应变测量过程中能够自动进行温度补偿，同时提高了应变测量的灵敏度。包括：应变电阻和基底，应变电阻固定在基底上，其特征在于，基底是由绝缘材料制成的薄膜，为曲线形结构，基底的正反两面分别设有应变电阻，实现应变测量过程中的温度补偿；两面的应变电阻的中轴线分别位于基底上的不同位置，实现应变测量过程中电阻变化量的差值。对待测物进行应变测量时，将双面电阻式应变传感器上位于基底正反两面的两个应变电阻在某一电学端部串联，之后将其与另外两个电学端部都接入半桥电路中并标定，测量半桥输出电压得到应变值

一种可延展的喷墨打印柔性电路板及其制备方法

本发明提供了一种可延展的喷墨打印柔性电路板，所述电路板的基底为镂空的岛桥结构或分形结构,岛桥结构中的桥和分形结构的基本单元都是曲线形，岛桥结构的桥宽和分形结构的最小线宽都与厚度尺寸相近，用以保证结构不发生平面外屈曲。本发明还提供了具体的制备方法，可以先镂空基底再喷墨打印电路，也可以先在基底上喷墨打印电路再镂空处理。本发明的柔性电路板具有可延展性且工艺比较简单，也比较廉价

一种电阻式应变传感器及应变测量方法

本发明提供了一种电阻式应变传感器及应变测量方法，该应变传感器在应变测量过程中能够自动进行温度补偿，同时提高了应变测量的灵敏度。包括：应变电阻和基底，应变电阻固定在基底上，其特征在于，基底由绝缘材料制成，为曲线形结构，基底至少包括两排，两排基底并列设置，其端部分别连接至一个粘贴端；两排基底上的应变电阻在一端串联，实现应变测量过程中的温度补偿；两排基底上的应变电阻的中轴线位于基底的不同位置，实现应变测量过程中电阻变化量的差值。应变测量时，将上述电阻式应变传感器中，串联的应变电阻的两个电学端及串联导通处分别接出一条引线到半桥测量电路并标定，测量半桥输出电压得到待测物的应变

Splitting of neutral mechanical plane of conformal;multilayer piezoelectric mechanical energy harvester subject to euler buckling

Flexible piezoelectric mechanical energy harvesters(MEHs)are of recent interest as an important emerging variant of traditional piezoelectric devices.The design of stacking multilayer MEHs with adhesive in between is an effective way to enhance the magnitude of power generation.Here,we present an...</p

一种三层柔性电池结构及制备方法

本发明公开了一种三层柔性电池结构，它包括柔性基底(1)、岛桥结构(2)、电池(3)。本发明将柔性基底之上的电池和导线设计为三层结构，中间一层为紧密排列的电池阵列，电池上下两侧为导电小圆柱以及使它们并联的铜导线，它们分别引出电池的正极与负极，每个小圆柱都对应与其共中心的正方形电池部分，电池之间紧密排列覆盖整个基底，整个结构具有很高的延展性，同时实现了电池覆盖率的最大化，极大地提升了电池单位面积容量