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Moniruddoza Ashir, Andreas Nocke and Chokri Cherif

References [1] Mallick PK. (2007). Fiber-Reinforced Composites: Materials, Manufacturing, and Design. New York: Taylor and Francis Group, ISBN 978-1-4200-0598-1. [2] Ashir M, Nocke A, Theiss C, Cherif C. (2017). Development of adaptive hinged fiber reinforced plastics based on shape memory alloys. Composite Structures, 170, 243-249. [3] Hossain MM, Elahi AHMF, Afrin S, Mahmud MI, Cho HM, Khan MA. (2017). Thermal Aging of Unsaturated Polyester Composite Reinforced with E-Glass Nonwoven Mat. AUTEX Research Journal, Vol. 19, No 1, March 2019, 17

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G. Gugutsidze and F. Draškovič

- ISBN 80-227-2359-2. S. 25-26. Gugutsidze George: Selection of best cross-section for timber composite beams reinforced with carbon fiber reinforced plastics. In: Wood. Raw material of 21-th century in Architecture and Civil Engineering. Year-book from 6th conference with foreign participation, SR, Smolenitse 6.-7.9.2007. Bratislava ADAPT, 2007. ISBN 978-80-89145-04-1. S. 27-30 Reddy J. N.: Finite Element Method. 2005 Fiorelli J., Alves Dias A.: Theoretical model and experimental analysis of

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S.C. Ng, N. Ismail, Aidy Ali, Barkawi Sahari and J.M. Yusof

Experimental investigation on effective detection of delamination in gfrp composites using taguchi method

Detection of delamination defect in glass fiber reinforced plastics (GFRP) by using ultrasonic testing has been a challenging task in industry. The properties of the constituent materials, fiber orientation and the stacking sequence of laminated composite materials could cause high attenuation of ultrasound signals. Ultrasonic testing is based on the interpretation of the reflected ultrasound signals when a transducer imposes ultrasound waves (pulse) to a material. It is difficult to differentiate if the reflected signal is induced from the defects, fiber content or the intermediate layers of GFRP composites. Most of the time, the drastic attenuation of signals could enshroud the modest changes in the reflected signals from defects. The purpose of this paper is to investigate the influence of fiber orientation, thickness and delamination of GFRP composites on the rise time, pulse duration and attenuation ratio of the reflected ultrasound signal. The rise time, pulse duration and attenuation ratio of A-scan data was observed with respect to different positions of damage (delamination), thickness and stacking sequence of the lamina. It is essential to identify the significant factors that contribute to the abnormal characteristics of the reflected signals in which the defect is identified. Moreover, this paper presents the application of Taguchi method for maximizing the detection of defect in GFRP composites influenced by delamination. The optimum combination of the significant contributing factor for the signal’s abnormal characteristics and its effect on damage detection was obtained by using the analysis of signal-to-noise ratio. The finding of this study revealed that delamination is the most influential factor on the attenuation ratio.

Open access

Dave (dea-wook) Kim, Daniel John Hennigan and Kevin Daniel Beavers

.-Y. and Hu, X., 2000. Tensile properties of short-glass-fiber- and short-carbonfiber-reinforced polypropylene composites, composites Part A: Applied Science and Manufacturing, 31(10), pp.1117-1125. 13.Horsmon, A., 2001. Lightweight composites for heavy-duty solutions. Marine Technology, 38 (2), pp.112-115. 14.Mallick, P.K., 2007. Fiber reinforce composites: materials, manufacturing, and design. 3rd Edition, London, Great Britain: CRC Press, Taylor and Francis Group. 15.Modi, D. Correia, N. Johnson, M. Long, A. Rudd, C

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Mirosław Rodzewicz and Jerzy Lewitowicz

Abstract

The paper concerns an application of lightness factors in comparative analysis of strength properties of basic materials being applied in aeronautical structures – in a historical perspective. The use of lightness factors enables effective estimation how lighter will be the structural elements (of the same strength or stiffness) made from different kind of materials : traditional as well as advanced composites. It is quite easy to find the solution to the inverse problem, i.e. to estimate how differ will be stiffness or strength for the same mass of the structural elements. Very particular application of the lightness factors are noted in engineers calculations of composite gliders wing spars, where they appears as the materials constants and as structure loading factors as well. The paper presents some examples of application of the lightness factors in strength analysis of the composite shells applied in the shear webs of the wing spars, and refers to the design recommendations issued by German aviation authority (LBA).

Open access

Mirosław Rodzewicz and Jerzy Lewitowicz

Abstract

The paper concerns an application of lightness factors in comparative analysis of strength properties of basic materials being applied in aeronautical structures – in a historical perspective. The use of lightness factors enables effective estimation how lighter will be the structural elements (of the same strength or stiffness) made from different kind of materials : traditional as well as advanced composites. It is quite easy to find the solution to the inverse problem, i.e. to estimate how differ will be stiffness or strength for the same mass of the structural elements. Very particular application of the lightness factors are noted in engineers calculations of composite gliders wing spars, where they appears as the materials constants and as structure loading factors as well. The paper presents some examples of application of the lightness factors in strength analysis of the composite shells applied in the shear webs of the wing spars, and refers to the design recommendations issued by German aviation authority (LBA).

Open access

Simona Plavanescu (Mazurchevici), Fabrizio Quadrini and Dumitru Nedelcu

®, Bio-Based Plastics: Materials and Applications, First Edition, Edited by Stephan Kabasci, John Wiley & Sons. Ltd. Published 2014 by John Wiley & Sons, Ltd., pp. 89-115, (2014). [5] Nedelcu, D., Pruteanu, O.V., Aspecte ale formării canelurilor exterioare prin deformare plastică la rece utilizând metoda Taguchi (Some Aspects of Forming Exterior Grooves by Cold Plastic Deformation using Taguchi Method), Tehnica-Info Publishing House, Chişinău, ISBN 9975-910-96-3, pp. 243-261 (2000). [6] http://www.mec.tuiasi.ro/rm/ , Accessed: 10.03.2015 [7] Tensile

Open access

Andrey Benin and Ekaterina Bogdanova

literature. Progress in Structural Engineering Materials, Vol. 7, 2005, pp. 194-209. [8] WANG, J. - GANGARAO, H. - LIANG, R. - ZHOU, D. - LIU, W. – FANG, Y.: Durability of glass fiber-reinforced polymer composites under the combined effects of moisture and sustained loads. Journal of Reinforced Plastics and Composites, Vol. 34, No. 21, 2015, pp.1739 - 1754. [9] BENIN, A. - SEMENOV, S. – BOGDANOVA, E.: Influence of long-term exposure in the concrete of FRP rebars on bond characteristics. Solid State Phenomena, Vol. 263, SSP, 2017, pp. 3 - 6.

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Lukáš Likavčan, Maroš Martinkovič, Jozef Bílik and Miroslav Košík

. Composites Science and Technology, 61, 1389-1400. 4. ADVANI AG, TUCKER III CL. 1987. The use of tensors to describe and predict fiber orientation in short fiber composites. Journal of Rheology, 31(8), 751-84. 5. MARTINKOVIČ, M. 2012. Structure analysis of short glass fibre reinforced composite based on polypropylene. In Plastko 2012 : Sborník konference Plastko. Zlín: Univerzita Tomáše Bati, s. 5. ISBN 978-80-7454-137-7 6. MARTINKOVIČ, M. - HORVÁTH, J. 2001. Structure analysis of short glass fibres reinforced plastics gear

Open access

Zhi Wang, Jiajia Zhou, Linjian Song and Long Li

References 1. Junrong Jiang, "Research progress in modification of unsaturated polyester resin", Thermosetting Resin(China) 17:22-25, 2002. 2. Tianxin Ma, Bo Jiang, "Effect of plasticizers on properties of epoxy resin", Thermosetting Resin(China) 18:7-9, 2003. 3. Rui Mei, Jun Wang, Junming Li, Hongxiao Si, "Research on the tension-tension fatigue performance of glass fiber reinforced plastic", Fiber Reinforced Plastics/Composites 2: 39-42, 2013. 4. A-ying Zhang, Dongxing Zhang, Dihong Li, Rui