Abstract
During the curing process, the exothermic cross-linking reaction inside epoxy resin-based composites causes overheating and, eventually, a thermal degradation of the matrix. Thick sectioned epoxy composites require an optimized curing cycle in order to minimize the temperature raise inside the composite. However, the recommended cycle for thin laminates is often wrongly used also for thick sectioned composites, resulting in an overheating. In this work, the mechanical behaviour of laminates having different thicknesses was investigated. Specimens were cured according to a curing cycle optimal for thin laminates which causes overheating in thicker laminates. The curing temperature histories at several positions inside the laminates were monitored and recorded and, following a new methodological approach, a series of comparative interlaminar shear tests was performed. Experimental results show a decrease of the interlaminar shear strength in thicker laminates. A simple model to account for the detrimental effect of the exothermic peak on the interlaminar shear strength is proposed.
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Shevtsov S, Zhilyaev I, Soloviev A, Parinov I, Dubrov V (2012) Optimization of the composite cure process based on the thermo-kinetic model. Adv Mater Res 569:185–192
Antonucci V, Giordano M, Hsiao K-T, Advani S (2002) A methodology to reduce thermal gradients due to the exothermic reactions in composites processing. Int J Heat Mass Transf 45(8):1675–1684
Pantelelis N (2003) Optimised cure cycles for resin transfer moulding. Compos Sci Technol 63(2):249–264
He H-W, Li K-X (2014) Effect of processing parameters on the interlaminar shear strength of carbon fiber/epoxy composites. J Macromol Sci B 53(6):1050–1058
Lee D-J, Palley I (2012) Simple model to predict the interlaminar shear strength of laminate composites. J Compos Mater 46(11):1357–1365
Hernández S, Sket F, Molina-Aldareguía JM, González C, Llorca J (2011) Effect of curing cycle on void distribution and interlaminar shear strength in polymer–matrix composites. Compos Sci Technol 71(10):1331–1341
Olofsson KS (1997) Temperature predictions in thick composite laminates at low cure temperatures. Appl Compos Mater 4(1):1–11
Ruiz E, Trochu F (2005) Numerical analysis of cure temperature and internal stresses in thin and thick RTM parts. Compos A: Appl Sci Manuf 36(6):806–826
Brauner C, Block TB, Purol H, Herrmann AS (2012) Microlevel manufacturing process simulation of carbon fiber/epoxy composites to analyze the effect of chemical and thermal induced residual stresses. J Compos Mater 46(17):2123–2143
Sorrentino L, Bellini C (2015) Compaction influence on spring-in of thin composite parts: experimental and numerical results. J Compos Mater 49(17):2149–2158
Ciriscioli PR, Springer GS, Wang Q (1991) A technique for determining mechanical properties of thick composite laminates. J Compos Mater 25(10):1330–1339
Olivier P, Cavarero M (2000) Comparison between longitudinal tensile characteristics of thin and thick thermoset composite laminates: influence of curing conditions. Comput Struct 76(1):125–137
Nightingale C, Day RJ (2002) Flexural and interlaminar shear strength properties of carbon fibre/epoxy composites cured thermally and with microwave radiation. Compos A: Appl Sci Manuf 33(7):1021–1030
Wisnom MR, Reynolds T, Gwilliam N (1996) Reduction in interlaminar shear strength by discrete and distributed voids. Compos Sci Technol 56(1):93–101
Liu Y, Yang J-P, Xiao H-M, Qu C-B, Feng Q-P, Fu S-Y et al (2012) Role of matrix modification on interlaminar shear strength of glass fibre/epoxy composites. Compos Part B 43(1):95–98
Chandrasekaran VCS, Advani SG, Santare MH (2010) Role of processing on interlaminar shear strength enhancement of epoxy/glass fiber/multi-walled carbon nanotube hybrid composites. Carbon 48(13):3692–3699
ASTM D2344/D (2000) Standard test method for short-beam strength of polymer matrix composite materials and their laminates
Koziol M (2012) Experimental study on the effect of stitch arrangement on mechanical performance of GFRP laminates manufactured on a basis of stitched preforms. J Compos Mater 46(9):1067–1078
Koziol M (2013) Effect of thread tension on mechanical performance of stitched glass fibre-reinforced polymer laminates—experimental study. J Compos Mater 47(16):1919–1930
Dmitriev O, Mischenko S (2011) Optimization of curing cycles for thick-wall products of the polymeric composite materials. In: Attaf B (ed) Advances in composite materials—ecodesign and analysis. InTech, Rijeka, p 642
Sorrentino L, Bellini C (2015) Validation of a methodology for cure process optimization of thick composite laminates. Plast Technol Eng 54(17):1803–1811
Sorrentino L, Bellini C (2013) Numerical analysis of compaction influence on spring-in of thin composite components manufactured by vacuum bag process. In: Van Hoa S, Hubert S (eds), The 19th International Conference on Composite Materials, Montreal, Canada, pp 9095–9103
Dragan A, Carlone P (2015) Soft computing in the design and manufacturing of composite materials. Woodhead Publishing, Cambridge
Mazumdar S (2001) Composites manufacturing: materials, product, and process engineering. CRC, Boca Raton
Slusar BF, Rubtsov Y, Shevtsov S, Fomin A (2005) Mould heating distribution control system simulation for polymerization of a composite spar for helicopter main rotor blade. Comsol Multiphysics User’s Conference, Stockholm
Sorrentino L, Polini W, Bellini C (2014) To design the cure process of thick composite parts: experimental and numerical results. Adv Compos Mater 23(3):225–238
Lee SN, Chiu MT, Lin HS (1992) Kinetic model for the curing reaction of a tetraglycidyl diamino diphenyl methane/diamino diphenyl sulfone (TGDDM/DDS) epoxy resin system. Polym Eng Sci 32(15):1037–1046
ASTM E2070 (2013) Standard test method for kinetic parameters by differential scanning calorimetry using isothermal methods
Sorrentino L, Tersigni L (2012) A method for cure process design of thick composite components manufactured by closed die technology. Appl Compos Mater 19(1):31–45
Guo Z-S, Du S, Zhang B (2005) Temperature field of thick thermoset composite laminates during cure process. Compos Sci Technol 65(3):517–523
Oh JH, Lee DG (2002) Cure cycle for thick glass/epoxy composite laminates. J Compos Mater 36(1):19–45
Jourawski DJ (1856) Sur la Résistance d’un Corps Prismatique et d’une Pièce Composée en Bois ou on Tôle de Fer a une Force Perpendiculaire à leur Longueur. Annales des Ponts et Chaussées, Mémoires et Documents, 3a série, 12(2):328–351
Cui W, Wisnom MR, Jones M (1994) Effect of specimen size on interlaminar shear strength of unidirectional carbon fibre–epoxy. Compos Eng 4(3):299–307
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Esposito, L., Sorrentino, L., Penta, F. et al. Effect of curing overheating on interlaminar shear strength and its modelling in thick FRP laminates. Int J Adv Manuf Technol 87, 2213–2220 (2016). https://doi.org/10.1007/s00170-016-8613-5
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DOI: https://doi.org/10.1007/s00170-016-8613-5