A STUDY ON THE EFFECT OF THICKNESS AND STACKING SEQUENCE ON THE STIFFNESS OF COMPOSITE LAMINATES UNDER QUASI-STATIC LOADING

O. David-West, N. Tomy

Abstract


The quasi-static loading characteristics of symmetric carbon fibre-reinforced epoxy matrix composites loaded to a peak of 2500 N and then unloaded were evaluated in terms of the characteristics of the response, bending stiffness and energy consumed for lay-up configuration in the families of [0/90/±45]s , [±45/0/90]s and [0/90/0/90]s. The test samples were manufactured measuring 100 x 150 (mm) and during testing they were held firmly with toggle clamps on the support fixture placed on the bed of an instrumented Tinius Olsen universal testing 25ST machine. The macro-mechanical behaviour of laminates with respect to quantities of the laminate extensional and bending stiffness matrices were compared in relation to the experimentally obtained normalized plate bending stiffness; also, the energy absorbed quantities related to the bending stiffness of the different categories of the laminates. The results obtained reveal that the ratios of the extensional stiffness to the bending stiffness elements of the matrices are relevant quantities affecting the load – displacement plot, energy absorbed and the bending stiffness. Also, the increase in the number of surface cross plies in composites is a good approach to increase resistance to major damage for composite structures.


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References


Alan Baker (2004). Composite Materials for aircraft structures. Alexander Bell Drive, Reston: American Institute of aeronautics and astronautics.

Chou T W. Mechanics of two-dimensional woven fabric composites. Delaware composites design encyclopedia Lancaster: Technomic 1989; 1: 131–50.

Buluta M, Erklig A. The investigation of quasi-static indentation effect on laminated hybrid composite plates, Mechanics of Materials 2018, 117: 225–234.

Spronk S W F, Kersemans M, De Baerdemaeker J C A, Gilabert F A, Sevenois R D B, Garoz D, Kassapoglou C, Van Paepegem W. Comparing damage from low-velocity impact and quasi-static indentation in automotive carbon/epoxy and glass/polyamide-6 laminates, Polymer Testing 2018; 65: 231–241.

Xie J, Waas A M, Rassaian M. Analytical predictions of delamination threshold load of laminated composite plates subject to flexural loading, Composite Structures 2017; 179: 181–194.

Zopp C, Dittes A, Nestler D, Scharf I, Kroll L, Lampke T, Quasi-static and fatigue bending behaviour of a continuous fiber-reinforced thermoplastic/metal laminate, Composites Part B 2019; 174: 107043.

Andrew J J, Arumugam V, Ramesh C, Poorani S, Santulli C, Quasi- static indentation properties of damaged glass/epoxy composite laminates repaired by the application of intra-ply hybrid patches, Polymer Testing 2017; 61: 132 – 145.

Hofmann S, Ozturk B, Koch D, Voggenreiter H. Experimental and numerical evaluation of bending and tensile behaviour of carbon-fibre reinforced SiC. Composites Part A, 2012; 43(11): 1877-1885.

Nikhil, R., Shivakumar, S., Anupama, K., Manjunath, S. Experimental and numerical investigation of mode II failure behaviour evaluation using three point bend, end notched flexure test. MATEC Web of Conferences, 2018; 144: [02009]. https://doi.org/10.1051/matecconf/201714402009.

Matthews F L and Rawlings R D. Composite Materials: Engineering and Science. Woodhead Publishing Limited, Cambridge England 2008.

de Moura M F S F, Marques A T. Prediction of low velocity impact damage in carbon–epoxy laminates, Composites Part A 2002; 33(3): 361-368.

ASTM D7136/D7136M-12 standard test method for measuring the damage resistance of a fibre-reinforced polymer matrix composite to a drop-weight impact event.

Sutherland L S, Guedes Soares C, The use of quasi-static testing to obtain the low-velocity impact damage resistance of marine GRP laminates, Composites: Part B 43 (2012) 1459–1467

Yahaya R, Sapuan S M, Jawaid M, Leman Z, Zainudin E S. Quasi-static penetration and ballistic properties of kenaf–aramid hybrid composites, Materials and Design 63 (2014) 775–782

Davies G O, Hitchings D, Wang J. Prediction of threshold impact energy for onset of delamination in quasi-isotropic carbon/epoxy composite laminates under low-velocity impact. Composites Science and Technology 2000; 60:1-7.

Nunes J P, Pouzada A, Bernardo C. The use of a three-point support flexural test to predict the stiffness of anistropic composite plates in bending. Polymer testing 2002; 21: 27-33.

Hancox N L. Fibre Composites Hybrid Materials, Elsevier Science Ltd, 1981.




DOI: http://dx.doi.org/10.2022/jmet.v15i2.6361

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