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NEW METHOD FOR PART SYMMETRY AUTOMATED RECOGNITION IN DFA

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Journal of china textile University(English Edition) 1997年第2期14卷 16-20页

作者：马瑞晓杨建国秦鹏飞陈瑞琪 china textile Univ Shanghai China

Design for assembly (DFA) evaluation has preved to be a systematic approach in determining how well a product is designed from the point of view of assembly. Geometric feature, such as symmetry, is an important factor when evaluating the assemblability of a part in it. But the automated detection of symmetry has always been considered to be a difficult problem which requires great effort. Proposed here is a new method for part symmetry automated recognition. The method is based on ray detecting theory and can effectively recognize the symmetry of parts with various shapes. It is of great importance to linking together DFA evaluation procedure with CAD model.

关键词： design for assembly symmetry feature recognition

Study of Blended Antistatic PET Filament

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Journal of china textile University(English Edition) 2000年第2期17卷 46-49页

作者：仲蕾兰何小军 china textile Univ Shanghai China

From the effects of the composition of the three kinds ofblended systems, the antistatic agent content and theblending methods on the spinnability, the antistatic prop-erty, and the wash fastness of PET filament, it is foundthat the antistatic behavior of the (PET) - (PEG) -(SDBS) - stearate quaternary system is improved greatlydue to the synergefic effect of the combined antistaticagents and the volume resistivity of the fiber *** reaches 10~8 ～ 10~9Ω·cm after being washed 20 tines in saponaceous water at 40℃. Its spinnability anddrawing behavior are good. The effect of the antistaticagent content on the mechanical property of PET fila-ment is also studied.

关键词： antistatic electricity polyester filaments mechanical property antistatic PET filament antistatic agent synergetic effect volume resistivity

Simulation Model of Mechanical Properties of Point - Bonded Nonwovens

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Journal of china textile University(English Edition) 1999年第2期16卷 43-45页

作者：李作攀储才元 china textile Univ Shanghai China

A computer model for studying the mechanical properties of point - bonded nonwovens is established. The simulation tensile curve of a nonwoven fabric may be obtained based on relaxation procedure when the mechanical properties of fibers, the arrangement of bond points in the fibrous web and specimen size are inputted into the computer. Relaxation method and relevant algorithms of computer simulation are described in detail. The validity of the model is also demonstrated.

关键词： Computer Simulation Point - Bond Non-wovem Mechanical Properties

Stability Robustness Bounds of Stochastic Linear Systems with Delayed Perturbations

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Journal of china textile University(English Edition) 1998年第1期15卷 25-27页

作者：舒慧生吴让泉 china textile Univ Shanghai China

This note considers stability robustness bounds on a classof stochastic linear systems with delayed *** the stochastic Lyapunov stability theory,severalsufficient conditions for delay-independent stochasticasymptotic stability are *** is shown that if theperturbation terms satisfy some conditions,then the sto-chastic systems have the robustness.

关键词： delayed perturbation systems stochastic stability robustness bounds

APPLICATION OF COMPOSITE FIBRE TO HIGH ELASTIC KNITTED FABRIC

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Journal of china textile University(English Edition) 1996年第2期13卷 72-76页

作者：张佩华 china textile Univ Shanghai China

The knitting condition and technology for PBT/PET composite fibre on loop wheel machine as well as the effect of knitted fabric structure and stitch parameter are discussed in this paper. The properties of high elasti... 详细信息

关键词： composite fibre knitted fabries extensibility elasticity.

Finite Element Simulation of the Polymeric Liquid Flow in Coat-hanger Die

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Journal of china textile University(English Edition) 1998年第3期15卷 76-80页

作者：王新厚黄秀宝程悌吾 china textile Univ Shanghai China

A three - dimenslonal finite element model is developed to deal with the polymeric liquid flow in coat - hanger die. This model is used to predict the flow behavior of the 2％ CMC/watsr solution in the coat - hanger die with linearly taper manifolds and its validity is experimentally verified quantitatively and qualitatively by using Laser Doppler Velocimetry and Particle Image Velocimetry respectively.

关键词： three - dimensional finite element method coat - hanger die Laser Doppler Velocimetry Particle Image Velocimetry.

Study on the Technique of Double-faced Embroidery on Chinese Palace Fans

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Journal of china textile University(English Edition) 2000年第2期17卷 104-107页

作者：金韺兰高汉玉周启澄 china textile Univ Shanghai China

Double - faced iso - object embroidery is carried out byusing the uneven intercalated stitch crafts of the parallel- lines stitch as a main body, being accompanied by oth-er stitch crafts and miscellaneous stitches, done on thesame textile material. This paper deals with the flower -bird double - faced embroidery fan of the Qing Dynasty,from pattern design, stitching formation and techniqueof color arrangement, describes the possible way of mak-ing double - faced embroidery with iso - object effectboth in the front and in the back.

关键词： Double - faced embroidery Stitch craft Uneven intercalated stitch embroidery pattern .

Optimization of the Arrangement of Mixing Sheets in VK Tube

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Journal of china textile University(English Edition) 1998年第2期15卷 21-24页

作者：王夏琴唐志廉 china textile Univ Shanghai China

The flow mechanism of Nylon-6 melt over perforatedbaffles with conical shape in the VK tube is explained bycomputerized analysis based on a rational assumption ofStokes’*** governing equations for a two-dimen-sional flow are solved by finite difference method to gen-erate the stream function profile,velocity field and resi-dence time *** of the geometriesof the baffle structure brings about a uniform residencetime distribution of the melt,so as to ensure a homoge-neous extent of reaction for the final *** investigation shows that dead zones areformed and that a rule of thumb has to be practiced fortheir elimination.

关键词： VK tube conical perforated baffle residence time distribution finite difference method.

Study on Abrasion Resistance of Modified Polypropylene Fiber Reinforced Cement

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Journal of china textile University(English Edition) 2000年第2期17卷 37-39页

作者：高德川赵明杨序纲王依民 china textile Univ Shanghai China

Modified polypropylene fiber reinforced cement compos-ites were investigated in their abrasion resistance andsurface morphology. The test results showed the addingof fiber could noticeably improve the abrasion resistanceof composite. The bonding and friction of fibers/cementwere the main contribution to abrasion resistance im-provement, which resulted from the surface morphologyobservation.

关键词： modified polypropylene fiber fiber reinforced cement abrasion resistance surface morphology