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Formability of structural thermoplas...

Liu, Lu.

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Formability of structural thermoplastic textile composites.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Formability of structural thermoplastic textile composites./
作者:	Liu, Lu.
面頁冊數:	184 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-11, Section: B, page: 6236.
Contained By:	Dissertation Abstracts International66-11B.
標題:	Engineering, Mechanical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3195946
ISBN:	9780542418303

Formability of structural thermoplastic textile composites.
Liu, Lu.

Formability of structural thermoplastic textile composites. - 184 p.

Source: Dissertation Abstracts International, Volume: 66-11, Section: B, page: 6236.

Thesis (D.Eng.)--University of Massachusetts Lowell, 2005.

This dissertation research contributes to the development of a design tool for the thermostamping of structural commingled thermoplastic/glass woven-fabric composites in three areas: (1) a unit cell material model to predict the shear properties of woven fabrics and eliminate the need for experimental characterization of every fabric; (2) a proposed picture frame model to extract the shear stiffness from the picture frame test of woven fabrics; and (3) benchmark testing that helps establish test standards for experimental characterization of the shear properties of woven fabrics. The results of the developed analytical models can be directly used in the Finite Element Analysis (FEA) simulation of the thermostamping process, leading to a reduction in design and manufacturing costs of thermoplastic woven fabric composites.

ISBN: 9780542418303Subjects--Topical Terms:

783786
Engineering, Mechanical.

Formability of structural thermoplastic textile composites.
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500 $a Source: Dissertation Abstracts International, Volume: 66-11, Section: B, page: 6236.
500 $a Supervisor: Julie Chen.
502 $a Thesis (D.Eng.)--University of Massachusetts Lowell, 2005.
520 $a This dissertation research contributes to the development of a design tool for the thermostamping of structural commingled thermoplastic/glass woven-fabric composites in three areas: (1) a unit cell material model to predict the shear properties of woven fabrics and eliminate the need for experimental characterization of every fabric; (2) a proposed picture frame model to extract the shear stiffness from the picture frame test of woven fabrics; and (3) benchmark testing that helps establish test standards for experimental characterization of the shear properties of woven fabrics. The results of the developed analytical models can be directly used in the Finite Element Analysis (FEA) simulation of the thermostamping process, leading to a reduction in design and manufacturing costs of thermoplastic woven fabric composites.
520 $a In the unit-cell modeling, a multiscale method is used to develop a macro-mechanics model that includes the evolution of the meso and microstructures of woven fabrics during forming. At the macroscale, equilibrium conditions of a woven-fabric unit cell during the picture frame test are studied. The two key shear-resistance mechanisms, friction between warp and weft yarn at every crossover and lateral compaction between adjacent yarns, are included in the equilibrium equation in terms of shear resistance moments, which can be predicted as functions of the shear load and shear angle in the picture frame test. Input parameters for the model are easily identifiable fabric parameters (yarn width, yarn count, fabric thickness, fiber type, yarn shape), fiber contact ratio, and process related parameters (yarn-to-yarn coefficient of friction, clamping force, and temperature). A fiber-bundle model consisting of bundles that deform as beam elements at the microscale is adopted to predict the compaction stiffness of yarns. Validation of the analytical model shows a very good correlation between prediction and experimental results for balanced commingled-polypropylene/glass woven fabrics and polyester woven fabrics.
520 $a For experimental characterization of the fabrics and validation of the unit cell model, studies are conducted and compared to results obtained by other groups in an international benchmark activity to help establish shear test standards for woven fabrics. These experimental efforts also are used to validate a picture frame model based on the kinematics of the picture frame test to calculate the shear stress and shear stiffness from the picture frame experimental data. Experimental and model results correlate well, such that the shear stiffness can be used as a material input in the FEA simulation.
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650 4 $a Textile Technology. $3 1020710
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790 1 0 $a Chen, Julie, $e advisor
791 $a D.Eng.
792 $a 2005
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