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Article
Publication date: 30 September 2019

Dan Zhao, Cun Xin, Tao Jin, Xiaopeng Yan, Shenggguo Ma and Zhihua Wang

The purpose of this study to analyze the plastic anisotropy of 6061 aluminum alloy with finite deformation using crystal plasticity finite element method.

Abstract

Purpose

The purpose of this study to analyze the plastic anisotropy of 6061 aluminum alloy with finite deformation using crystal plasticity finite element method.

Design/methodology/approach

A representative volume element (RVE) model was constructed by Voronoi tessellation. In this model, grain shapes, grain orientations and distribution of grains were involved. The mechanical response of the component under composite loading was tested using specify cruciform specimen. Moreover, different stress and strain states in the specific central region were analyzed to reveal the effects of complex loading.

Findings

We calculated the influence of misorientation of adjacent grains as well as the evolution of the micro structure’s plastic deformation on the macroscopic deformation of the structure. Geometry design for the cruciform specimen helps obtain a homogenous distribution of the stress and strain at the specimen center. In this process, the initial grain orientation is also an important factor, and the larger misorientations between special grains may cause greater stress concentration.

Originality/value

The influence of micro-scale factors on macro-scale plastic anisotropy of AA6061 is analyzed using RVE model and cruciform specimen, and they offer a reference for related research.

Details

Engineering Computations, vol. 37 no. 3
Type: Research Article
ISSN: 0264-4401

Keywords

Article
Publication date: 1 December 2001

George Stylios

Discusses the 6th ITCRR, its breadth of textile and clothing research activity, plus the encouragement given to workers in this field and its related areas. States that…

1039

Abstract

Discusses the 6th ITCRR, its breadth of textile and clothing research activity, plus the encouragement given to workers in this field and its related areas. States that, within the newer research areas under the microscope of the community involved, technical textiles focuses on new, ‘smart’ garments and the initiatives in this field in both the UK and the international community at large. Covers this subject at length.

Details

International Journal of Clothing Science and Technology, vol. 13 no. 6
Type: Research Article
ISSN: 0955-6222

Keywords

Article
Publication date: 5 January 2015

Tao Jin, Hongzhi Jia, Wenmei Hou and Yusaku Fujii

– This paper aims to propose a method for measuring the rotation of moving body during parabolic flight using camera.

Abstract

Purpose

This paper aims to propose a method for measuring the rotation of moving body during parabolic flight using camera.

Design/methodology/approach

An orthogonal matrix used to calculate the Euler angles of rotation is solved by means of singular value decomposition. The translation velocity and position of moving body are measured by a binocular camera system.

Findings

The experiment is executed in a jet aircraft to simulate micro-gravity during parabolic flight. And the human moving body is regarded as a rigid body. The results show that this method can calculate the angles effectively.

Practical implications

This work is useful for calculation and monitoring body’s motion in space.

Originality/value

The paper gives a method which measures the rotation of a rigid body under the microgravity by a binocular camera to modify the measurement error of the interferometer.

Details

Aircraft Engineering and Aerospace Technology: An International Journal, vol. 87 no. 1
Type: Research Article
ISSN: 0002-2667

Keywords

Article
Publication date: 14 August 2019

Jin-yuan Qian, Zan Wu, Qian-Kun Zhang, Zhi-Jiang Jin and Bengt Ake Sunden

The purpose of this paper is to study the effects of dimple geometries and arrangements on the heat transfer enhancement in a dimple jacketed heat exchanger.

Abstract

Purpose

The purpose of this paper is to study the effects of dimple geometries and arrangements on the heat transfer enhancement in a dimple jacketed heat exchanger.

Design/methodology/approach

For the purpose of this paper, with the experimental validated numerical model, this paper carries out numerical simulations of both single dimples with different geometries and the whole dimple jacketed heat exchanger with different dimple arrangements. For a single dimple, its secondary vortex flow, temperature differences and the pressure drop performance for different geometries are analyzed. For the whole dimple jacketed heat exchanger, the heat transfer and pressure drop performances are investigated by comparing the no dimple, triangular and rectangular dimple arrangements.

Findings

Results show that dimples can improve the heat transfer efficiency compared with conventional jacketed heat exchanger, and specific geometries and arrangement of dimples for better heat transfer performance are figured out.

Originality/value

This paper considers both dimple geometries and arrangements, which can be useful for further applications in specific integrated devices or similar applications.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 29 no. 8
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 4 January 2011

JinTao Chen and Zi‐Qiang Zhu

The purpose of this paper is to analyze the phase coil connections and winding factors of flux‐switching permanent magnet (FSPM) brushless AC machines with all poles and…

Abstract

Purpose

The purpose of this paper is to analyze the phase coil connections and winding factors of flux‐switching permanent magnet (FSPM) brushless AC machines with all poles and alternate poles wound, and different combinations of stator and rotor pole numbers.

Design/methodology/approach

The coil‐emf vectors, which are widely used for analyzing the conventional fractional‐slot PM machines with non‐overlapping windings, are employed for FSPM machines.

Findings

Although the coil‐emf vectors have been employed to obtain coil connections in the conventional fractional‐slot PM machines, they are different in FSPM machines. It is mainly due to different polarities in the stator of FSPM machines. In addition, from the coil‐emf vectors it is able to predict whether the back‐emf waveforms are symmetrical or asymmetric.

Originality/value

This is the first time that coil‐emf vectors are used to determine the coil connections and winding factors in FSPM machines with different topologies and combination of stator and rotor pole numbers.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 30 no. 1
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 1 July 2006

Jin‐jiang Wang, Jiang‐yun Zeng, Xutao Mo, Ren Li, Peng Wang, Wen‐yao Liu and Ming Liu

The brake connector of an automobile is one important part in the brake system. How to measure the matching surface quality is a problem, because the matching surface is a…

Abstract

Purpose

The brake connector of an automobile is one important part in the brake system. How to measure the matching surface quality is a problem, because the matching surface is a cone surface and has a deep aperture structure.

Design/methodology/approach

A new measurement system is presented which could assure illumination and image with a special beam splitter. The worker could observe the matching surface by better image.

Findings

More objective evaluation is given with image processing method.

Research limitations/implications

Now, this measurement system is used by Toyota (Tianjin) company and satisfied result is obtained.

Originality/value

This paper is an original work and focuses on an important issue in automobile production.

Details

Assembly Automation, vol. 26 no. 3
Type: Research Article
ISSN: 0144-5154

Keywords

Article
Publication date: 31 August 2012

JinTao Zhan, Yan‐Rui Wu, Xiao‐Hui Zhang and Zhang‐Yue Zhou

The number of farms engaged in grain production in China has been declining in recent years. Limited efforts have been devoted to examine why producers quit from grain…

Abstract

Purpose

The number of farms engaged in grain production in China has been declining in recent years. Limited efforts have been devoted to examine why producers quit from grain production and how such exits affect China's grain output. Such information, however, is invaluable in understanding whether the exit from grain production should be encouraged and if so, how. The purpose of this paper is to identify the factors that influence farmers' decision to quit from grain production, with a view to drawing implications for devising policies to deal with such exits.

Design/methodology/approach

Both descriptive statistics and econometric techniques are used to analyse a set of unique and comprehensive farm‐level survey data to identify key factors that affect farmers' decision to quit from grain production.

Findings

Key factors that influence a farm to quit from, or stay in, grain production include: family size, the share of farming labour out of total family labour, per capita arable land, the proportion of land used for grain production, the share of family income from grains. It was also found that the level of grain prices and the sunk cost in farming, chiefly in grain production, also affect the likelihood that a household will stay or exit from grain production. Further, farmers in more economically developed regions are more likely to quit from grain production.

Originality/value

The paper's findings clearly indicate that farms with a larger scale of grain production and earning higher income from grain are the major contributors to China's grain production. Potential exists for China to raise its total grain output if the land from those exiting farmers is readily made available to larger producers, enabling them to further benefit from the economies of scale.

Details

China Agricultural Economic Review, vol. 4 no. 3
Type: Research Article
ISSN: 1756-137X

Keywords

Article
Publication date: 20 June 2008

Kwan Yi and Tao Jin

The purpose of this paper is to probe the external visibility of the web sites of all seven ALA‐accredited Canadian library and information science (LIS) schools. The…

Abstract

Purpose

The purpose of this paper is to probe the external visibility of the web sites of all seven ALA‐accredited Canadian library and information science (LIS) schools. The number of inlinks to the schools' web sites is used as an indicator of the visibility of all or some portions of the LIS web sites.

Design/methodology/approach

Inlinks pointing to the LIS school web sites were collected using the AlltheWeb search engine. The LIS school web pages pointed to by inlinks were manually analysed to discover visible topics and contents.

Findings

Four content clusters were identified by which to group the content of all the inlinked LIS school web pages. These clusters were LIS, research, home page and resources. The most visible cluster was the LIS cluster and the least visible was the research cluster. The most visible topics were student projects/activities, LIS‐related resources and course‐related information, in that order. The home page of each LIS school's web site was shown to be the single web page with the most visibility.

Originality/value

This was a comparative webometric study, which collected and analysed inlinks for seven Canadian LIS school web sites at two different times, 3 years apart (2003 and 2006). In the study, the ranking of visible clusters, topics and web pages from the LIS web sites were identified.

Details

Online Information Review, vol. 32 no. 3
Type: Research Article
ISSN: 1468-4527

Keywords

Content available
Article
Publication date: 3 July 2017

Li Hong Xing

296

Abstract

Details

Journal of Money Laundering Control, vol. 20 no. 3
Type: Research Article
ISSN: 1368-5201

Article
Publication date: 1 December 2002

George K. Stylios

Looks at the eighth published year of the ITCRR and the research, from far and near, involved in this. Muses on the fact that, though all the usual processes are to the…

Abstract

Looks at the eighth published year of the ITCRR and the research, from far and near, involved in this. Muses on the fact that, though all the usual processes are to the fore, the downside part of the industry is garment making which is the least developed side. Posits that the manufacture of clothing needs to become more technologically advanced as does retailing. Closes by emphasising support for the community in all its efforts.

Details

International Journal of Clothing Science and Technology, vol. 14 no. 6
Type: Research Article
ISSN: 0955-6222

Keywords

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