Basic Study on Electro-Adhesive Surface Applying 3-Dimensional Micro Structures

2016 ◽  
Vol 10 (1) ◽  
pp. 48-54 ◽  
Author(s):  
Soichiro Yamada ◽  
◽  
Ryo Koike ◽  
Shintaro Arano ◽  
Yasuhiro Kakinuma ◽  
...  
Keyword(s):  
Particle Distribution ◽  
Structure Design ◽  
Experimental Result ◽  
Electrical Field ◽  
Basic Study ◽  
3 Dimensional ◽  
Silicone Gel ◽  
Adhesive Surface ◽  
Adhesion Performance ◽  
Micro Structures

Electro Adhesive Gel (EAG) has the unique characteristic of changing its surface adhesive property with the intensity of the electrical field applied. This property makes EAG useful in applications to fixing devices and mechanical brakes. Although its adhesion performance depends on the distribution of the electro-rheological particles in the EAG, it is difficult to arrange the particle distribution uniformly in a wide area from the perspective of production process. In this study, a novel functional elastomer that has the same function as EAG is developed, Electro Adhesive Surface (EAS). In EAS, micro photolithography is used to fabricate strut pyramids distributed uniformly on a substrate, and then silicone gel is poured into the structure. When an electrical field is applied, the silicone gel rises to the tops of the pyramids formed by the struts, and adhesion occurs to an object on EAS. To determine a micro structure design for EAS, the fixing force was measured with various struts diameter and gaps. Experimental result shows that the larger struts diameter and the narrower gaps enhance the fixing force of EAS.

scholarly journals Development of an Electro-Adhesive Surface Applying 3-Dimensional Micro Structures

2015 ◽  
Vol 81 (3) ◽  
pp. 264-269
Author(s):  
Soichiro YAMADA ◽  
Tojiro AOYAMA ◽  
Yasuhiro KAKINUMA
Keyword(s):  
3 Dimensional ◽  
Adhesive Surface ◽  
Micro Structures

Experimental Study on a 3-Dimensional Hydro-Elastic Deformation of “Underwater Platform” With Multi-Towers in Waves

2016 ◽  
Author(s):  
Ken Haneda ◽  
Motohiko Murai ◽  
Jun Yamanoi
Keyword(s):  
Elastic Deformation ◽  
Body Motion ◽  
Offshore Wind ◽  
Elastic Response ◽  
Experimental Result ◽  
Elastic Model ◽  
Mooring Lines ◽  
3 Dimensional ◽  
Floating Offshore Wind Turbines ◽  
Head Waves

Underwater platform was proposed in OMAE 2015 for the purpose of enhancing productivity of various types of renewable energy converter on the sea and its feasibility study was carried out through 2 types of tank experiment [1]. The underwater platform which is a very large frame shape structure connects several floaters under the sea to share power cables and mooring lines and to keep relative distances between the floaters. In the experiment, 1/200 scale elastic model with three spar buoys was used. The buoys imitated spar type floating offshore wind turbines (FOWTs). From the experiment, it was shown that the platform with large draft can reduce its response in waves. In this paper, we report new result and knowledge obtained by additional model experiments use the 1/200 model. In the experiment, we changed the arrangement and draft of the model and measured hydro-elastic deformation of the underwater platform in waves. From the last experiment, relationship between draft settings and response was shown. In the experiment, relationship between wave angles and response was surveyed. From the experiment, we have confirmed followings: 1. Rigid-body motion is remarkable in beam waves, 2. Elastic response is remarkable in head waves, and 3. Remarkable torsional motion is occurred in 45 degrees’ waves. The more important thing, however, is that the experimental result indicated that the platform of large draft decreases its motion in the all the wave angles.

Prediction of Ridging by 3-Dimensional Texture in Ferritic Stainless Steels

2014 ◽  
Vol 622-623 ◽  
pp. 72-76
Author(s):  
Yang Jin Chung ◽  
Deok Chan Ahn ◽  
Frédéric Barlat ◽  
Myoung Gyu Lee
Keyword(s):  
Crystal Plasticity ◽  
Stainless Steels ◽  
Rolling Direction ◽  
Single Layer ◽  
Experimental Result ◽  
Dimensional Structure ◽  
Ferritic Stainless Steels ◽  
3 Dimensional ◽  
Crystal Plasticity Fem ◽  
Constitutive Parameters

Experimental and numerical investigations of the ridging in ferritic stainless steels were presented in this paper. Two kinds of ferritic stainless steels exhibiting different levels of ridging were selected as model materials. The measured roughness of the uniaxially elongated specimens up to 15% in rolling direction (RD) was compared to the prediction using a rate-dependent crystal plasticity FEM (CPFEM). Initial textures of the two materials on 5 equi-spaced sequential RD planes were obtained by EBSD measurement. The initial textures were utilized as input data for the constitutive parameters of the crystal plasticity. Measured respective single planar textures were collected all together so that the 5-layer textures complete 3-dimensional structure and they were mapped onto the FE mesh. Ridging profiles predicted by the CPFEM using both every single layer texture and multilayer texture were compared to the experimental results. Predicted ridging profile of a material exhibiting weak ridging by using 5-layer EBSD mapping was in good agreement with the experimental result. On the other hand, prediction by using only single layer texture was efficient to estimate the ridging in a material exhibiting severe ridging due to the elongated cluster of analogous orientations along RD.

Research on the Preparation and Properties of UV-Curable Organic Silicon Nanomaterials

2016 ◽  
Vol 703 ◽  
pp. 284-289
Author(s):  
Xi Dan Luo ◽  
Xue Tao He ◽  
Peng Cheng Xie ◽  
Jian Yun He ◽  
Yu Mei Ding ◽  
...  
Keyword(s):  
Particle Distribution ◽  
Sol Gel ◽  
Uv Curing ◽  
Side Chain ◽  
Nano Materials ◽  
Uv Curable ◽  
Organic Silicon ◽  
Photo Curing ◽  
Micro Structures ◽  
Nanometer Particle

New organic silicon nano-materials which has photo-curing performance was prepared by sol-gel method using γ-methacryloxy propylt rimethoxy silane as the starting materials. The micro-structures of the organic silicon nano-materials were characterized by FTIR and NMR. TEM was used to observe the nanometer particle size and the distribution of the nanometer particle in the organic silicon nanomaterials. The photo-curing properties of the new materials were tested. Results show that the new organic silicon nano-materials has uniform particle distribution and side chain of methacryloxy groups and can be UV-curing.

scholarly journals Basic Study on Deformation Evaluation of Steel Wire Mesh for Rational Gabion Structure Design

2019 ◽  
Vol 2 (2) ◽  
pp. 109-115
Author(s):  
Hiroshi Nakazawa ◽  
Tsuyoshi Nishi ◽  
Hiroyuki Kurihara ◽  
Daisuke Suetsugu ◽  
Tadashi Hara
Keyword(s):  
Design Method ◽  
Steel Wire ◽  
Tensile Tests ◽  
Structure Design ◽  
Wire Mesh ◽  
Deformation Characteristics ◽  
Basic Study ◽  
Tensile Direction ◽  
The Wire ◽  
Wire Meshes

Gabion structures are used in a variety of ways in Japan and around the world because they allow for the creation of simple structures at highly reasonable construction costs and completion periods. Previous earthquake damage surveys have shown that, in many cases, gabion structures did not collapse even though deformation was allowed, and have demonstrated that the wire mesh used in their construction has a high confinement effect on the stones filling the gabion. Despite this, gabions have not been actively utilized, nor have they been used to construct permanent structures in Japan because the design and construction of such structures are based on experience, and a standardized design method has not been developed. Hence, in order to facilitate development a design method for gabion-based structures, we must first go back to the basics and establish a detailed explanation of the wire mesh deformation mechanism of such structures. In this study, we performed tensile tests on wire meshes of different shapes in order to determine their strength and deformation characteristics and then conducted numerical analyses using the results obtained. The tensile tests revealed that deformation characteristics differed depending on the mesh shape and tensile direction. We also showed that the direction in which the tension acts and the mesh nodes are important, and that the test results could be reproduced via numerical analysis with the finite element method by using beam elements.

Experimental Developments Toward Multi-Material Micron Scale Rapid Prototyping

1995 ◽  
Author(s):  
James L. Maxwell ◽  
Joseph Pegna
Keyword(s):  
Rapid Prototyping ◽  
Experimental Approach ◽  
Chemical Vapor ◽  
System Calibration ◽  
3 Dimensional ◽  
Mechanical Parts ◽  
Experimental Apparatus ◽  
Computer Controlled ◽  
Organometallic Precursors ◽  
Micro Structures

Abstract Rapid prototyping of millimeter- to micron-scale mechanical parts was obtained by selective Laser Induced Chemical Vapor Deposition (LCVD) onto a computer controlled five degree of freedom substrate. A description of Rensselaer’s experimental apparatus for 3-dimensional rapid prototyping is given. Details of the (LCVD) system are presented as well as the experimental approach taken. We illustrate our purpose with sample carbon micro-structures obtained during system calibration. By virtue of the process selected, the range of material that can be deposited is as large as there are organometallic precursors for them. Many ceramics, intermetallics, metals, and possibly some polymers can be grown via this method.

Sign in / Sign up

Export Citation Format

Share Document