114 research outputs found

    In-Plane Deformation Mechanics for Highly Stretchable Electronics

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    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

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    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

    一种面膜

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    本实用新型提供的一种面膜,通过连接器将带有可拉伸柔性电路板的面膜本体和控制单元相连,面膜本体提供物理美容功能,自身具有物理美容功能或接入相应的物理美容终端,控制单元为可拉伸柔性电路板提供电源与控制信号。本实用新型使面膜具备基础电路的基础上具备可拉伸性能,可以完美贴合不同的脸型,从而适用于任何人;同时,可在柔性电路板本身设置具有温热效应的电阻丝实现美容护肤,也可以任意添加物理美容终端,如LED贴片实现色光照射达到光子嫩肤的目的,或添加超声贴片达到促进面部护肤产品的吸收;或从而实现个性化的定制;同时可以随意卷曲,随身携带,操作简单,可以美容的同时兼顾其他事情,方便,省时

    一种可拉伸超声辅助面膜及其制备方法

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    本发明提供了一种可拉伸超声辅助面膜及其制备方法,用以解决现有技术中面膜吸收效率不高、超声导入仪不方便携带或操作复杂的问题。所述可拉伸超声辅助面膜将超声阵列可拉伸电路板封装外层面膜状弹性薄膜和内层面膜状弹性薄膜之间,用于产生预设频率的超声波;连接器将超声阵列可拉伸电路板与激励单元相连,通过激励单元为超声阵列可拉伸电路板提供产生预设频率超声波的激励电压,从而实现超声辅助面膜的功能。本发明超声功能通过可拉伸辅助面膜的方式,完美贴合人脸,配合其他面膜的使用,实现对药物或水分吸收的促进作用,相比直接使用美容药物面膜,大幅提高药物或水分的吸收速度和吸收率;相比使用超声导入仪,能够保持水分不易蒸发,操作更简单;同时超声辅助面膜可以折叠或卷曲,携带方便,操作简单

    一种仿鱼鳞结构太阳能电池及其制备方法

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    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

    一种可延展的喷墨打印柔性电路板及其制备方法

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    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

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    本发明提供了一种能够精确测量较大量程范围的电阻式应变传感器,包括:应变电阻和基底,所述应变电阻固定在所述基底上,所述基底由绝缘材料制成,为曲线形结构,所述应变电阻的中轴线位于所述基底的中轴线的一侧,实现所述电阻式应变传感器的量程的增大。相比常见的金属箔式电阻应变片,本方案所提供的应变传感器的量程设计范围可以从百分之几到百分之几千,可以有效解决金属箔线由于拉伸率的限制而可信量程较小的问题

    一种可伸展的柔性电极及其制备方法

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    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

    一种可拉伸温热物理面膜

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    本实用新型提供了一种可拉伸温热物理面膜,所述面膜包括:外层面膜状弹性薄膜、内层面膜状弹性薄膜、可拉伸分形结构电阻丝、连接器、电源;将可拉伸分形结构电阻丝封装在外层面膜状弹性薄膜和内层面膜状弹性薄膜之间,连接器将可拉伸分形结构电阻丝与电源相连,从而实现温热辅助面膜的功能。本实用新型的可拉伸温热辅助面膜,通过分形结构电阻丝和面膜状弹性薄膜的配合,完美贴合任意脸型,可配合其他面膜的使用,实现对药物或水分吸收的促进作用,大幅提高药物或水分的吸收速度和吸收率,也可单独使用,可以促进组织新陈代谢和自我修复;同时,温热辅助面膜可以弯曲和拉伸,可卷曲收藏,携带方便,操作简单,成本低廉
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