检索结果-内蒙古大学图书馆

Research Results of Possibility of Using Non-Traditional Materials in Design of Furniture for Children

IOP Conference Series: Materials Science and engineering 2021年第2期1079卷

作者： J S Antonenko N S Zhdanova J I Mishukovskaya Antonenko Julia Sergeevna Zhdanova Nadezhda Sergeevna candidate of pedagogical Sciences Professor of design Department Institute of Construction Architecture and Art Nosov Magnitogorsk State Technical University Russia Magnitogorsk Mishukovskaya Julia Ivanovna candidate of pedagogical Sciences associate Professor of design Department Institute of Construction Architecture and Art Nosov Magnitogorsk State Technical University Russia Magnitogorsk candidate of pedagogical Sciences associate Professor of Department of Design and Operation of Metallurgical Machines and Equipment Institute of Construction Institute of Metallurgy Mechanical Engineering and Metalworking Nosov Magnitogorsk State Technical University Russia Magnitogorsk

The article considers the experience of studying the design capabilities of unconventional materials in the design process of children's furniture. Polycarbonate has been known for a long time, it is produced industrially and is mainly used in construction. It has good consumer and aesthetic qualities, high ductility, and relative cheapness. All this prompted a team of teachers and students to experiment in studying the possibilities of using polycarbonate in furniture for children. Children are very active and 'destructive' in their activities. Not all furniture objects can withstand such loads, and those that withstand are often very expensive, because for children's institutions furniture is needed that would be durable and relatively cheap. The purpose of the experimental work is the design of children's furniture, taking into account the capabilities of non-traditional material, which meets the complex of modern requirements. The experimental work was carried out in three stages, on the first - the test material was corrugated cardboard, on the second - polystyrene, and on the third - polycarbonate. At each stage, a prototype was made and tested in a child care facility through operation for one month. Of the three materials studied, polycarbonate gave the best performance, which withstood all the mechanical loads of operation, retained its original shape, structural strength and external aesthetic appeal. The reviews of educators and employees of childcare facilities testify to the above qualities of the material and products made from it.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Design and analysis of a BELBIC controlled semi active suspension system

引用

Journal of Physics: Conference Series 2019年第1期1240卷

作者： P Sharma V Kumar PhD scholar Department of Mechanical Engineering NIT Kurukshetra India Associate Professor Department of Mechanical Engineering NIT Kurukshetra India

The vehicle dynamics gives lot of consideration to quality of ride and the value of comfort. These two are dependent on the suspension system of the vehicle. Researchers are doing a lot of work in the field of improving these two parameters. A lot of approaches and control systems like ANN, GA based system, fuzzy and hybrid control systems have been formulated, simulated and tested. This paper deals with mathematical modeling and simulation of passive and semi active system. The semi active system modeled here contains a new approach of using intelligent controller based on Brain functioning with emotional signal, known as BELBIC. The use of this controller has not been tested for suspension system as identified through rigorous literature survey. The both systems are simulated for their response to disturbance of road as step function and as profile of cosine shape. The results of passive and proposed semi active system were analyzed to compare their performance in terms of displacement of sprung mass and suspension travel as well as their settling time. The BEL controlled system has performed very good. The displacement of sprung body has been reduced in both the cases of road disturbances. The response against step input is better than cosine. Similarly settling time has also shown in improvement for step and cosine function.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Wind Farm Layout Optimization with Loads Considerations

引用

Journal of Physics: Conference Series 2020年第1期1452卷

作者： Stanley, Andrew P J King, Jennifer Ning, Andrew Ph.D. Candidate Brigham Young University Department of Mechanical Engineering BYU Provo UT 84602 Research Engineer National Renewable Energy Laboratory National Wind Technology Center 18200 CO-128 Boulder CO 80303 Assistant Professor Brigham Young University Department of Mechanical Engineering BYU Provo UT 84602

The objective of this paper is to improve the annual energy production of a wind farm by optimizing the layout of a wind farm, while considering fatigue loads on turbines. In this paper, the loads are estimated using the edgewise bending moment computed using CCBlade, a steady-state blade element momentum code. The edgewise bending moment is then used to calculate fatigue damage using Miner’s rule. The fatigue damage is used to constrain the layout optimization problem. We show that our method can predict blade root damage with similar trends to damage calculated with other methods, such as a complex, computationally expensive large-eddy simulation and unsteady aeroelastic code. We also optimize wind farm layouts and show that, for a simple problem with two wind directions and ten turbines, the fatigue damage can be constrained without sacrificing wind farm power production.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Design and development of fixture and modification of existing AFM setup to magnetic abrasive flow machining (MAFM) process setup

引用

Journal of Physics: Conference Series 2019年第1期1240卷 012009-012009页

作者： Chawla, Gagandeep Mittal, Vinod Kumar Mittal, Sushil PhD Scholar Department of Mechanical Engineering NIT Kurukshetra India Associate Professor Department of Mechanical Engineering NIT Kurukshetra India Associate Professor Department of Mechanical Engineering Chandigarh University India

To finish multifaceted geometries, miniaturized parts, especially of internal inaccessible cavities or recesses by the use of abrasives media with other constituents is known as abrasive flow machining (AFM). With the help of hydraulic pressure system, the media is extruded to-and-fro over the surface in this process. Recently, numerous amendments have been made for improving the performance of the AFM process. This paper presents a new modified AFM process known as magnetic abrasive flow machining process (MAFM) that is used to finish internal cylindrical surfaces. In MAFM process the electromagnet is made-up to locate around the cylindrical work-piece. For providing maximum magnetic field nearby the whole internal surface of the work-piece, there are two poles that are bounded by copper coils. In MAFM, aluminium fixture is considered to enhance the magnetic effect around the workpiece surface that helps in increasing the MRR and change in surface roughness (ΔRa).

关键词：

来源：评论

学校读者我要写书评

暂无评论

Physical, mechanical and thermal properties of lightweight foamed concrete with fly ash 2

Physical, mechanical and thermal properties of lightweight f...

引用

2nd Nommensen International Conference on Technology and engineering, NICTE 2018

作者： Habsya, Chundakus Diharjo, Kuncoro Setyono, Prabang Satwiko, Prasasto Doctor Candidate in Postgraduate Program Sebelas Maret University Indonesia Mechanical Engineering Dept. Engineering Faculty Sebelas Maret University Surakarta Indonesia Environmental Science Dept. Postgraduate Program Sebelas Maret University Surakarta Indonesia Department of Architecture Faculty of Engineering Universitas Atma Jaya Yogyakarta Indonesia

This study aims to investigate the effect of fly ash content on the density, thermal conductivity, compressive strength and water absorption of Lightweight Foamed Concrete (LFC). This LFC consists of cement, water, sand, fly ash (FA) and foam. The foam is needed to to create air voids in the mixture and reduce its weight. The foaming agent which was diluted in the water was given air pressure using foam generator to produce foam. The LFC are made with water-cement ratio of 1:1 and cement-agregat ratio of 1: 4. Aggregates consisted of sand and FA varied by 0%, 10%, 20% and 30% in weight. The content offoam was 30% and 40% of the mortar volume. The increasing of foam content decreases density, thermal conductivity, and compressive strength of LFC. However, that increases its water absorption. The increasing of FA contentalso decreases water absorption, but it density, thermal conductivity and compressive strength. © Published under licence by IOP Publishing Ltd.

关键词： Water absorption

来源：评论

学校读者我要写书评

暂无评论

Comparison of the mechanical response of a dual-phase and a single-phase steel bar category

引用

Procedia Structural Integrity 2018年 10卷 59-65页

作者： A. Drakakaki A. Apostolopoulos Ch. Apostolopoulos Laboratory of Technology & Strength of Materials Department of Mechanical Engineering and Aeronautics University of Patras Greece PhD Civil Engineer University of Ioannina Greece

In the current study, the effects of chloride-induced corrosion on a dual-phase and a single-phase reinforcing steel are evaluated in terms of mass loss and mechanical characteristics. Comparison of corrosion damage rates between the two types of steel, both of which have been used in real structures, indicates that they demonstrate different resistance against corrosion environments. Two different corrosion procedures were imposed on the steel bar categories, in order to achieve a satisfying correlation with the environmental conditions. Precisely, an effort was made to correlate the electrochemical corrosion method to the natural environment, by exploiting results taken from the salt spray chamber, which has already been correlated to the environment. At the same time, the differences among the two steel bar categories were analyzed, and an estimation was made concerning their degradation in reference to their exposure to the environmental conditions. Although single phase steel recorded higher mass loss, in comparison to the dual phase category, the latter demonstrated higher drop under Low Cycle Fatigue tests - after corrosion. However, taking into account that corrosion damage - and consequently mechanical behavior - varies according to the exposed length of steel reinforcement, many questions can be raised concerning the performance of various steel categories and existing reinforced structures as well. This is because existing regulations still do not take into consideration as a burdening factor the length of the exposed areas.

关键词： Corrosion mechanical performance comparison steel bar grades

来源：评论

学校读者我要写书评

暂无评论

Numerical simulation of road tunnel fires involving heavy goods vehicle with solid fuels

引用

Journal of Physics: Conference Series 2019年第1期1276卷

作者： Mukesh Singh Tomar Shashank Khurana PhD Scholar Department of Mechanical Engineering BITS Pilani – Dubai Campus UAE Assistant professor Department of Mechanical Engineering BITS Pilani – Dubai Campus UAE

The road tunnel fire is an emerging topic in literature and many key areas are still undiscovered. Road tunnel fires can be catastrophic and can result in a significant loss of human life and property. In literature various experimental and numerical studies are available on road tunnel fires. Most of these studies involved heavy goods vehicle with a combination of wooden/plastic pallets to represent fuel arrangement. The fire scenario of heavy goods vehicle with solid wooden/plastic fuel is not well studied. The burning behavior of pallets and solid blocks are different and hence the tunnel conditions would be different under fire in both these cases. This will result in a significant difference in key parameters such as heat release rates and temperature profiles inside the tunnel. To study these effects, full-scale fire tests are ideal and recommended, however, due to extremely high cost, downtime, and legal obligations it's not always practical to conduct a full-scale fire test especially for road tunnels involving a heavy goods vehicle. In lieu of full-scale tests, numerical analyses are often used to understand these phenomena. This study focuses on studying the road tunnel fires involving heavy goods vehicle with solid fuels using CFD modelling in FDS (fire dynamic simulator). A pyrolysis model will be used to generate the anticipated heat in the tunnel. The kinetic properties of materials will be used in order to correctly calculate the pyrolysis rates of fuel. The findings of the heat release rate and lining temperature from the simulation will be compared with available results of heavy goods vehicle fires which involved pallets as fuel.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Investigation of road tunnel fires: challenges and findings

引用

Journal of Physics: Conference Series 2019年第1期1276卷

Numerical simulations have widely been used in the past to perform various complex engineering problems and phenomena. Most of the time the main objective of numerical modelling was to validate the outcome of experimental findings. However, it's not always possible to replicate the exact conditions of experiments while doing a numerical simulation. There are various obstacles in modelling complex engineering problems such as the capability of a program, computational resources, time, understanding the real physics, modelling of components etc. This study will focus on the road tunnel fires with a heavy goods vehicle. A full-scale experiment of road tunnel fires is not always feasible because of very high cost and legal procedures. This motivates alternative techniques such as numerical modelling to study such phenomena. A numerical analysis of road tunnel fire involving heavy goods vehicle is undertaken in this study using FDS (Fire dynamic simulator) program. The study will discuss the challenges associated with the numerical modelling of road tunnel fires. A comprehensive summary of real problems encountered in such modelling, their possible causes, alternative ways, their impact of overall results and few solutions will be presented in this study. This paper reviews the similar work done by other researchers worldwide and provides a benchmarking.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Prosthetic hand signals

引用

Significance 2018年第4期15卷 30-35页

作者： Mike Wininger Reva Johnson PhD has faculty appointments at the University of Hartford (Prosthetics Program) and Yale University (Department of Biostatistics) and is a statistician of clinical trials with the Department of Veterans Affairs. PhD is a professor in the Department of Mechanical Engineering and Bioengineering at Valparaiso University.

How Bayesian inference can decode movement intentions and control the next generation of powered prostheses. By Mike Wininger and Reva Johnson

关键词：

来源：评论

学校读者我要写书评

暂无评论

Dual functionality of deep eutectic solvents in chitosan-based biodegradable films for food packaging applications

引用

Industrial Crops and Products 2025年 232卷

作者： Justyna Jakubska Agata Wawoczny Dominika Kluska Paweł Grzybek Andrzej Hudecki Martyna Kołodziej Katarzyna Jasiak-Jaroń Abdullah Divine Yufetar Shyntum Klaudiusz Gołombek Wojciech Pakieła Katarzyna Krukiewicz Danuta Gillner Gabriela Dudek Department of Physical Chemistry and Technology of Polymers Faculty of Chemistry Silesian University of Technology Strzody 9 Gliwice 44-100 Poland Department of Physical Chemistry and Technology of Polymers PhD School Silesian University of Technology Akademicka 2A Gliwice 44-100 Poland Department of Organic Chemistry Bioorganic Chemistry and Biotechnology Silesian University of Technology Krzywoustego 4 Gliwice 44-100 Poland Biotechnology Center Silesian University of Technology Krzywoustego 8 Gliwice 44-100 Poland Lukasiewicz Research Network-Institute of Non-Ferrous Metals Gliwice Poland Bionoco Sp. z o.o. Ceramiki 41 Piekary Śląskie 41-945 Poland Materials Research Laboratory Faculty of Mechanical Engineering Silesian University of Technology Konarskiego 18A Gliwice 44-100 Poland Centre for Organic and Nanohybrid Electronics Silesian University of Technology Konarskiego 22B Gliwice 44-100 Poland

The growing demand for eco-friendly food packaging highlights the need for alternatives to synthetic polymers. This study presents a novel approach incorporating an antibacterial plant extract in a deep eutectic solvent (ExDES) into chitosan-based films. Notably, DES was used to extract bioactive compounds from tomato leaves, and the resulting extract, without separating the solvent, was directly incorporated into the films. This method provided a dual effect: DES functioned as a plasticizer, while the bioactive compounds in the extract contributed to the films antibacterial properties. Analysis of the mechanical, barrier, and antimicrobial properties of the obtained films revealed that the ExDES modified films exhibited enhanced performance, achieving the highest elongation at break (48 %) for the film with ExDES containing choline chloride, glycerol and lactic acid (ExD(CGL)). These findings demonstrate the potential of ExDES-modified chitosan films as sustainable packaging materials with improved mechanical strength and antimicrobial protection.

关键词： Biodegradable films Food packaging Chitosan Deep eutectic solvents Plant extracts

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：