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2016, vol. 44, br. 4, str. 353-357
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Upoređivanje efekta predopterećenja i zakrivljenosti kompozitnih laminata pod uticajem udara
Comparison of the effect of preload and curvature of composite laminate under impact loading
aAmirkabir University of Technology, Faculty of Polymer Engineering, Iran bUniversity of Bologna, Faculty of Industerial Engineering, Italy
e-adresa: tommasomaria.brugo@unibo.it
Sažetak
U ovom radu je razmatran efekat prednaprezanja pri udaru na kompozitne laminate. U tom cilju, tri uzorka su proizvedena i ispitana pod 4 različita uslova udara: 1- zakrivljen laminat bez prednaprezanja. 2- prednapregnut zakrivljen laminat, pokazujući niži poluprečnik zakrivljenosti zbog prednaprezanja. 3- zakrivljen laminat bez prednaprezanja, ali sa početnim smanjenjem zakrivljenosti. Posebni uslovi testiranja koji su proučavani omogućili su procenu i otkrivanje efekata prednaprezanja i zakrivljenosti prilikom testiranja na udar. Rezultati pokazuju da prednaprezanje dovodi do povećane zakrivljenosti, nakon čega sledi da se maksimalna udarna snaga oštećenja značajno povećava. Poređenje reluztata udara drugog i trećeg uzorka pokazuju da u slučaju slične zakrivljenosti prednaprezanje dovodi do nižeg oštećenog područja. Ovi rezultati su od posebnog značaja za projektovanje zakrivljenih kompozitnih komponenata.
Abstract
In this paper, the effect of preload on impact response of composite laminates is considered. To this aim, three specimens were manufactured and tested under 4 different impact conditions: 1- A curved laminate without preload. 2- A preloaded curved laminate, showing a lower radius of curvature due to the preload. 3- A curved laminate without preload but initial reduced curvature. The particular test conditions studied here allow estimating and discerning the effect of pre-stress and curvature on the impact response. Results show that the preload leads to an increased curvature, to which it follows that the maximum impact force and the damaged area increase significantly. The comparison of the impact response of the second and the third specimens show that, in the case of similar curvature, the preload leads to a lower damaged area. These results are particularly important for designing of curved composite components.
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Reference
|
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1   
|
Fotouhi, M., Saghafi, H., Brugo, T., Minak, G., Fragassa, C., Zucchelli, A., Ahmadi, M. (2017) Effect of PVDF nanofibers on the fracture behavior of composite laminates for high-speed woodworking machines. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 231(1): 31-43
|
|
7
|
Fragassa, C. (2016) Effect of natural fibers and bio-resins on mechanical properties in hybrid and non-hybrid composites. u: Proceedings of the 8th Conference on Times of Polymers & Composites. American Institute of Physics (AIP). 19-23th June, 1736, 020118
|
|
|
Heimbs, S., Heller, S., Middendorf, P., Hähnel, F., Weiße, J. (2009) Low velocity impact on CFRP plates with compressive preload: Test and modelling. International Journal of Impact Engineering, 36(10-11): 1182-1193
|
|
|
Karakuzu, R., Erbil, E., Aktas, M. (2010) Impact characterization of glass/epoxy composite plates: An experimental and numerical study. Composites Part B: Engineering, 41(5): 388-395
|
|
|
Kistler, L.S., Waas, A.M. (1998) Experiment and analysison the response of curved laminated composite panels subjected to low velocity impact. International Journal of Impact Engineering, 21(9): 711-736
|
|
|
Leylek, Z., Scott, M.L., Georgiadis, S., Thomson, R.S. (1999) Computer modelling of impact on curved fibre composite panels. Composite Structures, 47(1-4): 789-796
|
|
|
Mikkor, K.M., Thomson, R.S., Herszberg, I., Weller, T., Mouritz, A.P. (2006) Finite element modelling of impact on preloaded composite panels. Composite Structures, 75(1-4): 501-513
|
|
|
Minak, G., Abrate, S., Ghelli, D., Panciroli, R., Zucchelli, A. (2010) Residual torsional strength after impact of CFRP tubes. Composites Part B: Engineering, 41(8): 637-645
|
|
|
Minak, G., Abrate, S., Ghelli, D., Panciroli, R., Zucchelli, A. (2010) Low-velocity impact on carbon/epoxy tubes subjected to torque – Experimental results, analytical models and FEM analysis. Composite Structures, 92(3): 623-632
|
|
|
Mitrevski, T., Marshall, I.H., Thomson, R.S., Jones, R. (2006) Low-velocity impacts on preloaded GFRP specimens with various impactor shapes. Composite Structures, 76(3): 209-217
|
|
|
Naik, N., Meduri, S. (2001) Polymer-matrix composites subjected to low-velocity impact: effect of laminate configuration. Composites Science and Technology, 61(10): 1429-1436
|
|
|
Robb, M.D., Arnold, W.S., Marshall, I.H. (1995) The damage tolerance of GRP laminates under biaxial prestress. Composite Structures, 32(1-4): 141-149
|
|
|
Saghafi, H., Minak, G., Zucchelli, A. (2014) Effect of preload on the impact response of curved composite panels. Composites Part B: Engineering, 60: 74-81
|
|
9
|
Zivkovic, I., Pavlovic, A., Fragassa, C. (2016) Improvements in wood thermoplastic composite materials properties by physical and chemical treatments. International Journal of Quality Research, Vol. 10, No. 1: pp. 205-218
|
|
|
|
|