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1 – 10 of 26Jiang Hongxia, Wang Hongfu, Liu Jihong and Pan Ruru
The purpose of this paper is to research an auto generation method of developing FFT image and image pattern for textile based on FFT theory.
Abstract
Purpose
The purpose of this paper is to research an auto generation method of developing FFT image and image pattern for textile based on FFT theory.
Design/methodology/approach
In the research, a program was developed to generate FFT images using the FFT algorithm. The process of auto generation FFT image can be divided into the following steps: initializing the size of image, painting source image, giving the color pattern, transforming FFT image by FFT, designing mask template, and image pattern combining by point diagram. These image patterns can be used to apply on the textile.
Findings
The results showed that the FFT images can be used for textile designer directly. The FFT images can also be used as elements for textile image design such as clothing. The auto generation FFT images by FFT reflect different modern sense of beauty from traditional geometric images.
Research limitations/implications
There are many parameters that affect the art effect of FFT image generating by FFT algorithm. However, there is no discussion about the relationship between the parameters and art effect. Three dimension effects are not obvious in the simulation results by virtual clothing software.
Originality/value
The paper presents a fundamental understanding of the property of the FFT image generating by FFT algorithm and application method of the image pattern in clothing.
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Cheng Zou and Jihong Liu
Drilling is an important operation in aircraft wing assembly. In order to enhance this operation, automated machines are used. The purpose of this paper is to propose an off‐line…
Abstract
Purpose
Drilling is an important operation in aircraft wing assembly. In order to enhance this operation, automated machines are used. The purpose of this paper is to propose an off‐line programming system to generate NC code effectively and accurately for a five‐axis NC drilling machine applied in aircraft wing flexible assembly.
Design/methodology/approach
The NC program is divided into three hierarchical parts to correspond, respectively, to the whole wing, single rib and single hole. The programming procedure for such three‐layer wing structures is detailed, which includes product model modification, NC program generation and post‐processing.
Findings
By demonstration, the implemented system is proved to increase the efficiency and correctness of NC programming, and the generated program performed well on a flexible wing drilling system.
Research limitations/implications
The system can only program for automated drilling machine at present, however with further development both automated drilling and riveting machine in aircraft wing assembly can be programmed by this system. Another development might make this system universal for different machineries and other aircraft components.
Originality/value
The paper indicates a new way to program for rapid wing flexible drilling, and the generated NC program is more adaptable and easier to update for various aircraft wing structures.
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Liu Jihong, Jiang Hongxia and Lu Yuzheng
The purpose of this paper is to deduce the thickness property of three‐dimensional (3D) composite produced by 3D woven enhancing fabric based on an academic model.
Abstract
Purpose
The purpose of this paper is to deduce the thickness property of three‐dimensional (3D) composite produced by 3D woven enhancing fabric based on an academic model.
Design/methodology/approach
Thickness of 3D composite is determined by the important weaving parameter – the length of binder yarn. According to the shape of pile formed by binder yarn, curve function of pile is supposed. A rapier loom is modified for the 3D woven enhancing fabrics, and the composite is produced based on the fabric. The thickness of composite is produced and the theories results are validated.
Findings
The result of the analysis shows that the curve of pile formed by binder yarn can be expressed as sin function approximately, and there is linear relation between the thickness of composite and the length of pile of binder yarn.
Research limitations/implications
The results cannot be provided to study the relationship of thickness based on different technology of composite.
Originality/value
The paper provides an academic method of calculating the thickness of composite and the relationship between the thickness of composite and the length of binder yarn. The method can reduce the testing time.
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Jihong Liu, Itsuo Yamaura and Weidong Gao
This paper deals with the reflecting rays of yarn.
Abstract
Purpose
This paper deals with the reflecting rays of yarn.
Design/methodology/approach
The modeling, assuming that the fibers are arranged around the surface of elliptic yarn and reflecting rays of yarn are consisted of reflecting rays of fibers, is established using mathematical method. We can get a distributional curve of reflecting rays by this method.
Findings
It was found that because resolution was an important parameter in measurement equipment, the result of modeling must be filtered. It gives fundamental theory for selecting resolution and we also provide other useful value for selecting equipment of image processing. Resolution is an important parameter for measurement equipment. We have provided the minimum resolution for yarn. When we do image processing for yarn, we can get correct information of yarn by image processing with the minimum resolution and over.
Research limitations/implications
The result using different measurement equipment does not show the same result, therefore, the model must be filtered according to resolution.
Orginality/value
Although previous researches have used the reflecting property of yarn, little work that analyzed the reflecting model of yarn and the relationship between resolution and reflecting property has been achieved. We present a method of analyzing reflection of yarn.
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Examines the fifthteenth published year of the ITCRR. Runs the whole gamut of textile innovation, research and testing, some of which investigates hitherto untouched aspects…
Abstract
Examines the fifthteenth published year of the ITCRR. Runs the whole gamut of textile innovation, research and testing, some of which investigates hitherto untouched aspects. Subjects discussed include cotton fabric processing, asbestos substitutes, textile adjuncts to cardiovascular surgery, wet textile processes, hand evaluation, nanotechnology, thermoplastic composites, robotic ironing, protective clothing (agricultural and industrial), ecological aspects of fibre properties – to name but a few! There would appear to be no limit to the future potential for textile applications.
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Examines the sixteenth published year of the ITCRR. Runs the whole gamut of textile innovation, research and testing, some of which investigates hitherto untouched aspects…
Abstract
Examines the sixteenth published year of the ITCRR. Runs the whole gamut of textile innovation, research and testing, some of which investigates hitherto untouched aspects. Subjects discussed include cotton fabric processing, asbestos substitutes, textile adjuncts to cardiovascular surgery, wet textile processes, hand evaluation, nanotechnology, thermoplastic composites, robotic ironing, protective clothing (agricultural and industrial), ecological aspects of fibre properties – to name but a few! There would appear to be no limit to the future potential for textile applications.
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Keywords
Examines the fifteenth published year of the ITCRR. Runs the whole gamut of textile innovation, research and testing, some of which investigates hitherto untouched aspects…
Abstract
Examines the fifteenth published year of the ITCRR. Runs the whole gamut of textile innovation, research and testing, some of which investigates hitherto untouched aspects. Subjects discussed include cotton fabric processing, asbestos substitutes, textile adjuncts to cardiovascular surgery, wet textile processes, hand evaluation, nanotechnology, thermoplastic composites, robotic ironing, protective clothing (agricultural and industrial), ecological aspects of fibre properties – to name but a few! There would appear to be no limit to the future potential for textile applications.
Details
Keywords
Kun Liu, Wei Chen, Jihong Ye, Jian Jiang, Wenwen Chen and Mingyue Zhao
Most previous thermal-mechanical modeling of cold-formed steel (CFS) walls did not consider the failure of screwed connections under fire conditions because of the limited data of…
Abstract
Purpose
Most previous thermal-mechanical modeling of cold-formed steel (CFS) walls did not consider the failure of screwed connections under fire conditions because of the limited data of such connections at elevated temperatures.
Design/methodology/approach
In this study, 285 steady-state tests are conducted on CFS screwed connections with single-layer gypsum plasterboard (GPB) and Bolivian magnesium board (BMB) sheathing at ambient and elevated temperatures. The failure of these connections is described as the breaking of the loaded sheathing edge.
Findings
For the BMB sheathing screwed connections, hydrochloric acid gas is generated and released above 300°C, and the shear strength becomes much less than that of the GPB sheathing screwed connection above 370°C. Hence, BMB may not be suitable for use as the face-layer sheathing of CFS walls but is still recommended to replace GPB as the base-layer sheathing. The major influencing parameters on the shear strength of screwed connections are identified as the type of sheathing material and the loaded sheathing edge distance.
Originality/value
Based on the previous and present test results, a unified expression for the residual shear strength of screwed connections with GPB and BMB is proposed at ambient and elevated temperatures with acceptable accuracy. It can be used as the basic input parameter of the numerical simulation of the CFS structures under fire conditions.
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Jess Browning and Seung-Hee Lee
The Incheon Region has numerous assets that fall within a Pentaport model.' These include the Incheon International Airport, the Port of Incheon, a coastal industrial park, free…
Abstract
The Incheon Region has numerous assets that fall within a Pentaport model.' These include the Incheon International Airport, the Port of Incheon, a coastal industrial park, free economic zones, a leisure port, and Songdo new town designed to be the future Silicon Valley of Korea. This paper looks at how Northeast Asia trade flows between China and Korea might be enhanced by application of the Pentaport model in making the Incheon region a North East Asian Hub. It looks also at their trade and logistics systems as well as their water borne commerce. It proposes an integrated transportation system for the Yellow Sea Region being beneficial to the economies of the Northeast Asia. It also stresses that innovative technologies for ships, terminals and cargo handling systems should be introduced to develop a competitive short sea shipping system in the region and cooperation among the regional countries will be essential to achieve the final goal. The potential of methods of container shipping is discussed as it might apply to short sea shipping in the Yellow Sea Region that could greatly facilitate Incheon's situation with respect to the broader region in application of the Pentaport model.
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