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This paper is in four parts. The first is related to general considerations and experimental analyses, and each of the others is related to different approaches to the theoretical analyses of the mechanical behaviour of weft-knitted fabrics and weft-knitted reinforced composites made of glass fibre. The objective is to find ways of improving the mechanical properties and simulating the mechanical behaviour of knitted fabrics and knitted reinforced composites so that the engineering design of such materials and structures may be improved. In Part IV the technologies for weft-knitted 3D complex shape preform development are surveyed and a third model is presented. This a 3D model based on FEA (finite element analyses). A solid representation of a 2D yarn is built up, and an MES (mechanical event simulation) is applied to obtain a 3D-shaped loop. The final knitted fabric geometry is obtained by interacting this loop with the adjacent loops, according to the dimensional properties of the knitted fabrics and using an MES. Finally, the geometry of the reinforcement inside the composite is built up, and the composite material is divided into small tetrahedric elements to obtain a mesh of finite tetrahedric elements (FEA). The average values of the mechanical properties are obtained with FEA and compared with the experimental ones.
Czasopismo
Rocznik
Tom
Strony
72--80
Opis fizyczny
Bibliogr. 24 poz.
Twórcy
autor
- University of Minho, Guimarães, Portugal, phone: +351 253 510 280, fax: +351 253 510293
autor
- University of Minho, Guimarães, Portugal, phone: +351 253 510 280, fax: +351 253 510293
autor
- University of Minho, Guimarães, Portugal, phone: +351 253 510 280, fax: +351 253 510293
Bibliografia
- (1) Cebulla, H., Diestel, O., Offermann, P. (2001), Modelling and Production of Fully Fashioned Biaxial Weft-Knitted Fabrics, TECNITEX 2001 Proceedings, Ed. M. de Araújo, Póvoa de Varzím, Portugal, June,
- (2) Hong, H., Filho, A., de Araújo, M. D. and Fangueiro, R. (1994), The Development of 3D Shaped Knitted Fabrics for Technical Purposes on a Flat Knitting Machine, Indian Journal of Fibre & Textile Research, Vol. 19, India, pp. 189-194.
- (3) de Araújo, M. D., Hong, H. and Fangueiro, R. (1995), The Production of Shaped Reinforcing Fabrics by Knitting to Shape, Techtextil Symposium 95, Frankfurt, Germany
- (4) de Araújo, M. D., Hong, H. and Fangueiro, R. (1996), Production of 3D Shaped Reinforcing Fabrics by Knitting to Shape, Melliand Textileberichte English, Nº5, Germany, pp. E66-E67.
- (5) Hong, H., de Araújo, M. D. and Fangueiro, R. (1996), 3D Technical Fabrics, Knitting International, nº 1232, UK, pp.55-57.
- (6) Hong, H., de Araújo, M. D. and Fangueiro, R. (1996), Flat Knitting Machines for the Production of 3D Shaped Fabrics For Technical Applications, Melliand Textileberichte English, Nº1+2, Germany, pp. E13-E14.
- (7) de Araújo, M., Hong, H., Fangueiro, R. (1996), The Production of Shaped 3D Reinforced Fabrics by Knitting to Shape, VII International Izmir Textile and Apparel Symposium, Turkey, pp.K20-K27
- (8) Fangueiro, R. (2002), Optimisation of the development of 3D weft-knitted preforms for composite reinforcements, PhD Theses, The University of Minho, Portugal.
- (9) de Araújo, M. D., Hong, H. and Fangueiro, R. (1994), A New Process for the Production of Multiaxial Weft Knitted Fabrics, Techtextil Symposium 94, Frankfurt, Germany.
- (10) de Araújo, M., Hong, H., Fangueiro, R,(1994), A New Process for the Production of Multiaxial Weft-Knitted Fabrics, Proceedings of ISF 94, Yokohama, Japan, pp.395
- (11) Fangueiro, R. (1995), The Development of an Experimental Prototype for the Production of Multiaxial Weft-Knitted Fabrics, MSc Thesis, The University of Minho, Portugal.
- (12) de Araújo, M., Hong, H., Fangueiro, R. (1995),“A Multiaxial Weft-Knitted Technology for Industrial Textiles, International Textile Bulletin-Nonwovens, Switzerland, pp.44-45
- (13) Fangueiro, R., Araújo, M. de and Hong, H. (1998), Advances in Weft-Knitting Technical Structures, The Nordic Textile Journal, Sweden, pp. 36-53.
- (14) de Araújo, M., Hong, H., Fangueiro, R. and Catarino, A.(2000), Advancements in Weft-Knitting Science and Technology: Towards Sustainability and Growth, Spring 2000 Meeting of Fiber Society, Portugal, 17-19, May.
- (15) de Araujo, M.D., Hong, H., Fangueiro, R., and Ciobanu, O. (2001), Developments in Weft-Knitted Technical Fabrics, TECNITEX 2001 Proceedings, Ed. M. de Araujo, Póvoa de Varzím, Portugal, June.
- (16) Hyer, M.W. (1998),Stress Analysis of Fiber-Reinforced Composite Materials, McGraw Hill.
- (17) Kaw, A. (1997), Mechanics of Composite Materials, CRC Press. 1. Comandar, C. (1999), Structure and design of knitted fabrics, Ed. Cermi, Romania.
- (18) Postle, R. and Munden, D. L. (1967), J. of Text. Inst., 58, 329.
- (19) Hong, H., de Araújo, M. and Fangueiro, R. (2000), Modelling of the mechanical behaviour of weft knitted fabrics for composite reinforcement, ICCE/7, Denver, USA.
- (20) Nisitani, N. (1988), Improvement of Accuracy in BEM or FEM Based on the similarity of Stress Field Near Notch Roots, JSME International Journal, Series I, Vol. 31, nº 1.
- (21) Marvin, A.W. (1970), Combined Weft-Knitting-Woven Fabrics, in “Studies in Modern Fabrics”, Manchester, The Textile Institute, p 40-45.
- (22) Saturnia (1975), Machine Catalogue, ITMA 75, Milan, Italy.
- (23) Araújo, M. de, Hong, H., Fangueiro, R., Ciobanu, O., Ciobanu, L. and Moscathou, (2002), The design of complex shaped fibre based preforms for composite materials, 2nd AUTEX Conference, Belgium, 1-3 July.
- (24) Araújo, M. D. de (1978), "The Physical and Dimensional Properties of Cotton Interlock Fabrics", PhD Theses, University of Strathclyde, UK.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-fad4973f-6347-4410-aeec-3e11fea76453