IOP Conf. Series: Materials Science and Engineering最新文献_第2页

Energy harvesting “3-D knitted spacer” based piezoelectric textiles 基于压电织物的能量收集“三维编织间隔”

IOP Conf. Series: Materials Science and Engineering Pub Date : 2016-08-09 DOI: 10.1088/1757-899X/141/1/012001

S. Anand, N. Soin, T. Shah, E. Siores

{"title":"Energy harvesting “3-D knitted spacer” based piezoelectric textiles","authors":"S. Anand, N. Soin, T. Shah, E. Siores","doi":"10.1088/1757-899X/141/1/012001","DOIUrl":"https://doi.org/10.1088/1757-899X/141/1/012001","url":null,"abstract":"The piezoelectric effect in Poly(vinylidene fluoride), PVDF, was discovered over four decades ago and since then, significant work has been carried out aiming at the production of high p-phase fibres and their integration into fabric structures for energy harvesting. However, little work has been done in the area of production of “true piezoelectric fabric structures” based on flexible polymeric materials such as PVDF. In this work, we demonstrate “3-D knitted spacer” technology based all-fibre piezoelectric fabrics as power generators and energy harvesters. The knitted single-structure piezoelectric generator consists of high p-phase (~80%) piezoelectric PVDF monofilaments as the spacer yarn interconnected between silver (Ag) coated polyamide multifilament yarn layers acting as the top and bottom electrodes. The novel and unique textile structure provides an output power density in the range of 1.105.10 gWcm-2 at applied impact pressures in the range of 0.02-0.10 MPa, thus providing significantly higher power outputs and efficiencies over the existing 2-D woven and nonwoven piezoelectric structures. The high energy efficiency, mechanical durability and comfort of the soft, flexible and all-fibre based power generator is highly attractive for a variety of potential applications such as wearable electronic systems and energy harvesters charged from ambient environment or by human movement.","PeriodicalId":359151,"journal":{"name":"IOP Conf. Series: Materials Science and Engineering","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122348730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Comparative analysis of the processing accuracy of high strength metal sheets by AWJ, laser and plasma AWJ、激光和等离子体加工高强度金属板材精度的对比分析

IOP Conf. Series: Materials Science and Engineering Pub Date : 2016-08-01 DOI: 10.1088/1757-899X/145/2/022034

M. Radu, C. Schnakovszky, E. Herghelegiu, N. C. Tâmpu, V. Zichil

引用次数: 1

A robust algorithm for the contact of viscoelastic materials 粘弹性材料接触的鲁棒算法

IOP Conf. Series: Materials Science and Engineering Pub Date : 2016-08-01 DOI: 10.1088/1757-899X/145/4/042034

S. Spinu, D. Cerlinca

{"title":"A robust algorithm for the contact of viscoelastic materials","authors":"S. Spinu, D. Cerlinca","doi":"10.1088/1757-899X/145/4/042034","DOIUrl":"https://doi.org/10.1088/1757-899X/145/4/042034","url":null,"abstract":"Existing solutions for the contact problem involving viscoelastic materials often require numerical differentiation and integration, as well as resolution of transcendental equations, which can raise convergence issues. The algorithm advanced in this paper can tackle the contact behaviour of the viscoelastic materials without any convergence problems, for arbitrary contact geometry, arbitrary loading programs and complex constitutive models of linear viscoelasticity. An updated algorithm for the elastic frictionless contact, coupled with a semi-analytical method for the computation of viscoelastic displacement, is employed to solve the viscoelastic contact problem at a series of small time increments. The number of equations in the linear system resulting from the geometrical condition of deformation is set by the number of cells in the contact area, which is a priori unknown. A trial-and-error approach is implemented, resulting in a series of linear systems which are solved on evolving contact areas, until static equilibrium equations and complementarity conditions are fully satisfied for every cell in the computational domain. At any iteration, cells with negative pressure are excluded from the contact area, while cells with negative gap (i.e. cells where the contacting bodies are predicted to overlap) are reincluded. The solution is found when pressure is stabilized in relation to the imposed normal load. This robust algorithm is expected to solve a large variety of contact problems involving viscoelastic materials.","PeriodicalId":359151,"journal":{"name":"IOP Conf. Series: Materials Science and Engineering","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122652281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Energy optimization aspects by injection process technology 能量优化方面的注射工艺技术

IOP Conf. Series: Materials Science and Engineering Pub Date : 2016-08-01 DOI: 10.1088/1757-899X/145/2/022038

A. Tulbure, M. Ciortea, C. Huţanu, V. Farcaş

引用次数: 0

Fatigue FEM analysis in the case of brazed aluminium alloy 3L59 used in aeronautical industry 航空用3L59钎焊铝合金疲劳有限元分析

IOP Conf. Series: Materials Science and Engineering Pub Date : 2016-08-01 DOI: 10.1088/1757-899X/145/4/042009

A. Dimitrescu, G. Amza, D. Niṭoi, C. Amza, Z. Apostolescu

引用次数: 2

Modeling of a V-type mining support in an advanced engineering environment 先进工程环境下v型采矿支架的建模

IOP Conf. Series: Materials Science and Engineering Pub Date : 2016-08-01 DOI: 10.1088/1757-899X/145/4/042004

A. Gwiazda, W. Banaś, K. Foit, S. Topolska, Z. Monica, A. S^kala

{"title":"Modeling of a V-type mining support in an advanced engineering environment","authors":"A. Gwiazda, W. Banaś, K. Foit, S. Topolska, Z. Monica, A. S^kala","doi":"10.1088/1757-899X/145/4/042004","DOIUrl":"https://doi.org/10.1088/1757-899X/145/4/042004","url":null,"abstract":"Designing technical means using advanced computer systems requires the change in approaches to specific tasks carried out in this process. The solution of this problem is an integrative approach, which allows linking different operating ranges, various tools and complicated sets of requirements into a single operating design system. The elements of this integrative approach is the concept of splitting a technical mean system into three sub-system components. The first is structural sub-system containing solutions and their attributes regarding the structural concept of a designed system. The second is drive sub-system containing solutions of drive systems along with the parameters of their operation. Finally the last sub-system contains information relating to the control system and its settings. Systems attributes include such design features as the geometrical characteristics, material characteristics and assembly characteristics. The subject of the integrated design process is a mechanized mining support. As a part of the project the construction system of a mechanized mining support was divided on the three sub-systems. The structural subsystem includes a canopy, a burst shield and foot parts. Whereas the drive sub-system comprises includes the system of hydraulic props and hydraulic cylinders responsible for the functioning of the support. In the example, presented in the paper, is shown the system of hydraulic props where they are arranged in a V-system. These indicated two sub-systems form the structure of the support. It is complemented by the control sub-system basing on the use of control valves and separator valves and an operator control panel.","PeriodicalId":359151,"journal":{"name":"IOP Conf. Series: Materials Science and Engineering","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128597704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Recycling and reuse of chosen kinds of waste materials in a building industry 在建筑工业中回收和再利用选定的废物

IOP Conf. Series: Materials Science and Engineering Pub Date : 2016-08-01 DOI: 10.1088/1757-899X/145/3/032002

B. Ferek, J. Harasymiuk, J. Tyburski

{"title":"Recycling and reuse of chosen kinds of waste materials in a building industry","authors":"B. Ferek, J. Harasymiuk, J. Tyburski","doi":"10.1088/1757-899X/145/3/032002","DOIUrl":"https://doi.org/10.1088/1757-899X/145/3/032002","url":null,"abstract":"The article describes the current state of knowledge and practice in Poland concerning recycling as a method of reuse of chosen groups of waste materials in building industry. The recycling of building scraps is imposed by environmental, economic and technological premises. The issue of usage of sewage residues is becoming a problem of ever -growing gravity as the presence of the increasing number of pernicious contaminants makes their utilization for agricultural purposes more and more limited. The strategies of using waste materials on Polish building sites were analyzed. The analysis of predispositions to salvage for a group of traditional materials, such as: timber, steel, building debris, insulation materials, plastics, and on the example of new materials, such as: artificial light aggregates made by appropriate mixing of siliceous aggregates, glass refuses and sewage residues in order to obtain a commodity which is apt for economic usage also was made in the article. The issue of recycling of waste materials originating from building operations will be presented in the context of the binding home and EU legal regulations. It was proved that the level of recycling of building wastes in Poland is considerably different from one which is achieved in the solid market economies, both in quantity and in assortment. The method of neutralization of building refuses in connection with special waste materials, which are sewage sludge that is presented in the article may be one of the alternative solutions to the problem of recycling of these wastes not only on the Polish scale.","PeriodicalId":359151,"journal":{"name":"IOP Conf. Series: Materials Science and Engineering","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129267257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A new approach on the upgrade of energetic system based on green energy. A complex comparative analysis of the EEDI and EEOI 基于绿色能源的能源系统升级新途径。EEDI与EEOI的复杂对比分析

IOP Conf. Series: Materials Science and Engineering Pub Date : 2016-08-01 DOI: 10.1088/1757-899X/145/4/042014

C. Faităr, I. Novac

引用次数: 10

The effect of moisture content on grinding process of wheat and maize single kernel 水分含量对小麦和玉米单粒碾磨过程的影响

IOP Conf. Series: Materials Science and Engineering Pub Date : 2016-08-01 DOI: 10.1088/1757-899X/145/2/022024

M. Lupu, V. Pădureanu, C. Canja, A. Mazarel

引用次数: 6

High accuracy measurement line in microwave range for polymer samples weak doped with BaTiO3 弱掺杂BaTiO3聚合物样品在微波范围内的高精度测量线

IOP Conf. Series: Materials Science and Engineering Pub Date : 2016-08-01 DOI: 10.1088/1757-899X/145/2/022015

C. Huţanu, A. Tulbure, E. M. Ciortea

引用次数: 0