Çok katmanlı dokuma karbon-epoksi kompozit malzemelerde tek eksenli gerilme altında hasar başlama ve yayılma özelliklerinin araştırılması

Tekstil kompozitlerinde hasar ve mekanik özellikler, tekstil yapısı ile yakından ilgilidir. Bu makale, çok katmanlı 2x2 dimi karbon dokuma kompozitlerin, tek eksenli gerilim altında mekanik özelliklerini ve hasar başlama ve yayılma özelliklerini araştırmaktadır. Hasar araştırmaları, akustik emisyon kayıtları, tüm yüzeyli gerinim ölçümleri, x-ray ve optik mikroskop gözlemleri ile yapılmıştır. Testlerin sonucunda kompozitlerin mekanik özellikleri ve hasar başlama gerinim değerleri tespit edilmiştir. Çözgü doğrultusunda hasarın 0.2-0.3% gerinim düzeyinde başlayıp yayıldığı gözlenmiştir. Mikroskopik gözlemler hasarın, ipliklerin dokuma kumaş yapısında kıvrım aldıkları ve birbirleri ile kesiştikleri kısımlarda başladığını ve yayıldığını göstermiştir. Tüm yüzeyli gerinim ölçümleri ise, hasarın başlamasına neden olan gerilim konsanstrasyon bölgelerinin tekstil yapısına bağlı olduğunu göstermiştir.

An investigation of damage initiation and progression properties in multi-layer woven carbon-epoxy composite materials in uni-axial tension

Damage and mechanical properties in textile composites are closely connected with the textile reinforcement's internal structure. This paper reports and discusses a study of the mechanical behavior and damage of a 2x2 twill woven carbon/epoxy composite resulting from uni-axial tension in the warp direction. A damage investigation was performed by using acoustic emission, full-field strain optical measurements, as well as X-ray and optical microscopy. As a result of the tests, the mechanical properties and strain values of the composite's damage threshold were determined. Damage initiation when loaded in the warp direction occurred between 0.2-0.3% of the applied strain. Microscopic examination showed that damage or cracks initiated where the yarn was crimped and at interactions between the warp and fill yarns. Full-field strain measurements highlight the relation between the strain concentrations that are linked with the damage initiation and the reinforcement structure.

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1-Lomov, S.V, Bogdanovich, A.E., Ivanov, D.S., Mungalov, D., Karahan, M., Verpoest, I., A comparative study of tensile properties of non-crimp 3d orthogonal weave and multi-layer plain weave e-glass composites. Part 1: materials, methods and principal results, Composites A, 40,1134-1143 (2009).
2-Ivanov, D.S., Lomov, S.V, Bogdanovich, A.E., Karahan, M., Verpoest, I., A Comparative study of tensile properties of non-crimp 3d orthogonal weave and multi-layer plain weave e-glass composites. Part 2: Comprehensive experimental results, Composites A, 40,1144-1157 (2009).
3-Lomov S.V., Bogdanovich A. E., Ivanov D. S., Mungalov D., Verpoest I., Karahan M., Damage progression in 2D and non-crimp 3D woven composites, Composites2009 2ndECCOMAS Thematic Conference on the Mechanical Response of Composites, 1-3 April 2009, Imperial College London, UK.
4-Lomov S. V., Bogdanovich A. E., Ivanov D. S., Hamada K., Kurashiki T., Zako M., Karahan M., and Verpoest I., Finite element modelling of progressive damage in non-crimp 3D orthogonal weave and plain weave E-Glass composites, 2ND WORLD CONFERENCE ON 3D FABRICS, April 6-7, 2009, Greenville, South Carolina, USA.
5-Lomov S. V., Gorbatikh L., Greef N., Karahan M., Godara A., Mezzo L., Luizi F., Verpoest I., Nano-engineered fibre reinforced composite: Gain in properties and limitations of the manufacturing, 14TH EUROPEAN CONFERENCE ON COMPOSITE MATERIALS, 7-10 June 2010, Budapest, Hungary.
6-Gao, F., Boniface, L., Ogin, S. L., Smith, P. A., Greaves, R. P., Damage accumulation in woven-fabric CFRP laminates under tensile loading: Part 1. Observations of damage accumulation, Composites Science and Technology, 59(1), 123-136(1999).
7-Daggumati, S., De Baere, I., Van Paepegem, W, Degrieck, J., Xu, J., Lomov, S.V., Verpoest, I., Meso-scale modelling in thermoplastic 5-harness satin weave composite, ICCM-17, 17th International Conference on Composite Materials, Edinburgh, UK, 27-3 ljuly (2009).
8-John, S., Herszberg, I., Coman, F., Longitudinal and transverse damage taxonomy in woven composite components, Composites PartB, 32,659-668 (2001).
9-El Hage, Ch., Aboura, Z., Younes, R., Benzeggagh, M.L., Zoaeter, M., Experimental damage studies of 2.5D interlock CFRP under uniaxial loading, Proceeding of ECCM-12, Biarritz, France, Aug. 29-Sept. 1,(2006).
10-Bogdanovich, A.E., Lomov, S .V., Karahan, M., Mungalov, D., and Verpoest, I., Quasi-static and fatigue tensile behavior of carbon/epoxy composite reinforced with 3D non-crimp orthogonal woven fabric. Part 1: Stiffness and strength, Composites Part A, submitted.
11-Karahan, M., Lomov, S.V., Bogdanovich, A.E., and Verpoest, I., Quasi-static and fatigue tensile behavior of carbon/epoxy composite reinforced with 3D non-crimp orthogonal woven fabric. Part 2: Damage monitoring and analysis, Composites Part A, submitted.
12-Karahan, M., Lomov, S.V., Bogdanovich, A.E., and Verpoest, I., Quasi-static and fatigue tensile behavior of carbon/epoxy composite reinforced with 3D non-crimp orthogonal woven fabric. Part 3: Fatigue behaviour, Composites Part A, submitted.
13-Lomov, S. V., Ivanov, D.S., Truong, T.C., Verpoest, I, Baudry, F., Vandenbosche, K, Xie H., Experimental methodology of study of damage initiation and development in textile composites in tensile test, Composites Science and Technology, 68,2340-2349 (2008).
14-Masters, J.E., Ifju, P.G., A phenomenological study of triaxially braided textile composites loaded in tension, Composites Science and Technology, 56,347-358 (1996).
15-Quek, S.C., Waas, A.M., Shahwan, K.W., Agaram, V., Compressive response and failure of braided textile composite: Part 1 - experiments, International Journal of Non-Linear Mechanics, 39,635-648 (2004).
16-Truong, C. T., Vettori, M., Lomov, S. V., Verpoest, I., Carbon composites based on multiaxial multiply stitched preforms. Part 4: Mechanical properties of composites and damage observation, Composites Part A, 36,1207-1221 (2005).
17-Edgren, F., Mattsson, D., Asp, L.E., Varna, J., Formation of damage and its effects on non-crimp fabric reinforced composites loaded in tension, Composite Science and Technology 64, 675-692 (2004).
19-Karahan, M., Lomov S., V:, Bogdanovich, A. E., Mungalov, D., Verpoest, I., Internal geometry evaluation of non-crimp 3D orthogonal woven carbon fabric composite, accepted paper in pres, Composite Part A, doi: 10.1016/j.compositesa.2010.05.014, (2010).
20-Shioya, M., Yasui, S., Takaku, A., A refined method for estimating fiber and interfacial shear strength by using a single-fiber composite. Composite Interfaces, 4(6).379-99 (1997).
21-Lomov, S.V., Ivanov, D.S., Truong Chi, T., Verpoest, I., Baudry, F., Vanden Bosche, K., and Xie, H., Experimental methodology of study of damage initiation and development in textile composites in uniaxial tensile test, Composites Science and Technology, 68, 2340-9(2008).
22-Lomov, S.V., Ivanov, D.S., Verpoest, I., Zako, M., Kurashiki, T., Nakai, H., Molimard, J., and Vautrin, A., Full field strain measurements for validation of meso-FE analysis of textile composites, Composites A 39,1218-31 (2008).
23-Lomov, S.V., Gusakov, A.V., Huysmans, G., Prodromou, A., and Verpoest, I., Textile geometry preprocessor for meso-mechanical models of woven composites, Composites Science and Technology, 60,2083-2095 (2000).
24-Dadkhah, M.S., Flintoff, J.G., Kniveton, T., and Cox, B.N., Simple Models for Triaxially Braided Composites, Composites, 26, 91-102(1995).
25-Masters, J.E, Naik, R.A., Minguet, P.J., Effects of preform architecture on modulus and strength of 2-D triaxially braided textile composites, in Mechanics of Textile Composites Conference,ed. C. C. Poe, Jr., and C. E. Harris, NASA Conference Publication 3311, Part 2, pp 349-378.
26-Minguet, P. J., Fedro, M.J., and Gunther, C.K., Test methods for textile composites, NASA Contractor Report 4609, Boeing Defense and Space Group, Philadelphia, 1994.
25- Curtis, P.T. and Bishop, S.M., An assessment of the potential of woven carbon fibre-reinforced plastics for high "performance applications, Composites 15(14), 259-265 (1984).
27-Curtis, P.T. and Moore, B.B., A comparison of the fatigue performance of woven and non-woven CFRP laminates, Proceeding of ICCMV, San Diego, 1985, pp. 293-314.
28-Cox, B.N., Flanagan, G., Handbook of analytical methods for textile composites, Version 1.0. Rockwell Science Center, (Chapter 3) (1996).
29-Lee, B., Herszberg, I., Bannister, M.K., Curiskis, J.I., Effect of weft binder path length on the architecture of multi-layer woven carbon preform, in Proceeding of the 11th International Conference on Composite Materials, Scott ML, editor. Vol. V. Australian Co&posite Structures Society, Melbourne, Australia, 1997. p. 260.
30-Leong, K.H., Lee, B, Herszberg, I., Bannister, M.K., The efect of binder path on the tensile properties and failure of multilayer woven CFRP composites,, Composites Science and Technology, 60,149-156 (2000). '
31-Lee, B., Leong, K.H., Herszberg, I., The efect of weaving on the tensile properties of carbon fibre tows and woven composites, Journal of Reinforced Plastics and Composites, 20(8) 652-670 (2001).
32-Zako, M., Uetsuji, Y., Kurashiki, T., Finite element analysis of damaged woven fabric composite materials, Composites Science and Technology, 63,507-16 (2003).
32-Kurashiki, T., Zako, M., Hirosawa, S., Lomov, S.V., Verpoest, I., Estimation of a mechanical characterization for woven fabric composites by FEM based on damage mechanics, in: Proceedings ECCM-11,2004, Rodos; 2004 [CD edition].
33-Kurashiki, T., Zako, M., Nakai, H., Imura, M., Hirosawa, S., Damage development of woven composites based on multi-scale analysis, in: Proceedings of the 16th international conference on composite materials (ICCM-16), 2007, Kyoto; 2007 [CD edition].
34-Lomov, S.V., Verpoest, I., Peeters, T., Roose, D., Zako, M., Nesting in textile laminates: geometrical modelling of the laminate, Composites Science and Technology, 63(7), 993-1007 (2003).
35-Ito, M., Chou, T.W., An analytical and experimental study of strength and failure behaviour of plain weave composites, Journal of Composite Materials, 32(1): 2-30 (1998).