Download e-book for kindle: 3-D Fibrous Assemblies: Properties, Applications and by Jack Hu

By Jack Hu

ISBN-10: 1845693779

ISBN-13: 9781845693770

There were very important fresh advancements within the creation and alertness of 3 dimensional materials. those 3D cloth constructions have nice strength for brand spanking new materials and fabric functions. 3D fibrous assemblies summarises a few key advancements and their functions within the cloth undefined. The e-book starts off with an introductory bankruptcy which defines the strategies and kinds of 3D fibrous assemblies. The ebook then discusses how 3D materials should be utilized in cloth items. those variety from composites and protecting garments to clinical textiles. the rest of the e-book reports the 2 major 3D materials; multi-axial warp knitted materials and multi-layer woven materials. issues reminiscent of constitution, manufacture, homes and modelling are thought of for either materials. Written by way of a amazing writer, 3D fibrous assemblies may be a pioneering advisor for a extensive spectrum of readers, starting from fibre scientists and architects via to these thinking about learn and improvement of latest iteration cloth items.

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Additional resources for 3-D Fibrous Assemblies: Properties, Applications and Modelling of Three-Dimensional Textile Structures

Example text

26, a schematic representation of a Napco® structure is shown, and a cross-section of the working zone of a 3-D Web Linker® machine that produces 3-D structures starting from two pre-needled monolayers A and B can be seen in Fig. 27. g. ) for composites. 27 Machine cross-section: A and B – pre-needled non-woven monolayers; 1 – stripper plate; 2 – spacer tables; 3 – needle area; 4 – fibre bridges. 5 Conclusions Three-dimensional fibrous assemblies constitute a whole family of textile structures manufactured using weaving, knitting, braiding and non-woven methods.

The warp yarns are usually taken directly from a creel. This allows mixing of different yarns in the warp direction. Other, more complex 3-D fabrics such as polar and orthogonal weaves require specialized weaving machines. In polar weave structure, fibres or yarns are placed equally in circumferential, radial and axial directions. The fibre volume fraction is around 50%. Polar weaves are suitable for making cylindrical walls, cylinders, cones and convergent–divergent sections. To form such a shape, prepreg yarns are inserted into a mandrel in the radial direction.

5 Orthogonal weave. require much machining to reach the final product size and shape. A polar weave structure is shown in Fig. 4 (Adanur, 1995). In orthogonal weave, reinforcement yarns are arranged perpendicular to each other in the x, y and z directions. No interlacing or crimp exists between yarns. The fibre volume fraction is between 45% and 55%. By arranging the amount of yarn in each direction, isotropic or anisotropic preforms can be obtained.

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3-D Fibrous Assemblies: Properties, Applications and Modelling of Three-Dimensional Textile Structures by Jack Hu

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