Composite material components damaged by impact loading: a methodology for the assessment of their residual elastic properties

• Autorzy: Belingardi G. , Cavatorta M. P. , Paolino D. S.

Identyfikatory

DOI

10.5604/01.3001.0012.0735

• Języki publikacji: EN

Abstrakty

EN

Purpose: Detection and evaluation of damage due to impact or fatigue loading in components made by composite materials is one of the main concern for automotive engineers. We focus on damage due to impact loading on long fibre, plastic matrix composite, as they represent one of the most interesting development solution for automotive components toward lightweight structure that in turn means reduction of fuel consumption and of Green House Gas emissions. Design/methodology/approach: An innovative simplified methodology is proposed, based on the impact and repeated impact behaviour of composite material, for the evaluation of the induced damage and of material residual elastic properties. The investigated composite laminate is made of eight twill-wave carbon fabrics impregnated with epoxy resin. The methodology consists of two phases: at first the identification of the impact response. Composite plates have been impacted at different energy levels and residual elastic properties measured through standard tensile tests. The relationship between impact energy and residual elastic properties is obtained. Then the exploration impact load is identified, large enough to give a well-defined picture of the suffered damage but soft enough to do not induce further damage in the composite laminate. Findings: This exploration impact test and the Damage Index (DI) value, as interpretation key, leads to a prediction of the local residual elastic properties in the damaged area. The proposed methodology has been validated on plate specimens. A strict correlation is found between the predicted and the actual residual elastic properties of the damaged composite plate. Practical implications: Subsequently it has been applied to a composite beam, with a omega shape transverse section, that can be considered as a demonstrator for a typical beam used in the car body frame. Originality/value: A selection on the following alternatives will be possible: a – don’t care the damage is not affecting the structure performance; b – repair is needed but will be sufficient; c – substitute the damaged component as soon as possible.

Słowa kluczowe

EN

composite materials; NDT; impact loading; damage index; residual elastic properties

PL

materiały kompozytowe; NDT; obciążanie udarowe; wskaźnik uszkodzenia

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2018
• Tom: Vol. 87, nr 1
• Strony: 18--24
• Opis fizyczny: Bibliogr. 11 poz., rys., wykr.

Twórcy

autor

Belingardi G.

• Department of Mechanical and Aerospace Engineering, Politecnico di Torino, corso Duca degli Abruzzi 24, 10129 Turin, Italy

autor

Cavatorta M. P.

• Department of Mechanical and Aerospace Engineering, Politecnico di Torino, corso Duca degli Abruzzi 24, 10129 Turin, Italy

autor

Paolino D. S.

• Department of Mechanical and Aerospace Engineering, Politecnico di Torino, corso Duca degli Abruzzi 24, 10129 Turin, Italy

Bibliografia

• [1] W.J. Cantwell, J. Morton, The significance of damage and defects and their detection in composite materials: a review, The Journal of Strain Analysis for Engineering Design 27/1 (1992) 29-42.
• [2] M.E. Ibrahim, Nondestructive evaluation of thick-section composites and sandwich structures: A review, Composites Part A: Applied Science and Manufacturing 64 (2014) 36-48.
• [3] P. Gaudenzi, M. Bernabei, E. Dati, G. De Angelis, M. Marrone, L. Lampani, On the evaluation of impact damage on composite materials by comparing different NDI techniques, Composite Structures 118 (2014) 257-266.
• [4] A. Katunin, K. Dragan, M. Dziendzikowski. Damage identification in aircraft composite structures: A case study using various non-destructive testing techniques, Composite Structures 127 (2015) 1-9.
• [5] M.A. Pérez, L. Gil, S. Oller, Impact damage identification in composite laminates using vibration testing, Composite Structures 108 (2014) 267-276.
• [6] G. Belingardi, M.P. Cavatorta, D.S. Paolino, A new damage index to monitor the range of the penetration process in thick laminates, Composites Science and Technology 68 (2008) 2646-2652.
• [7] G. Belingardi, M.P. Cavatorta, D.S. Paolino, Repeated impact response of hand lay-up and vacuum infusion thick glass reinforced laminates, International Journal of lmpact Engineering 35 (2008) 609-619.
• [8] G. Belingardi, M.P. Cavatorta, D.S. Paolino, On the rate of growth and extent of the steady damage accumulation phase in repeated impact tests, Composites Science and Technology 69 (2009) 1693-1698.
• [9] ASTM D3039/D3039 M, Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials, American Society for Testing Materials, 2005.
• [10] ASTM D3518/D3518 M-94. Standard Test Method for In Plane Shear Response of Polymer Matrix Composite Materials by Tensile Test of a ±45° Laminate, American Society for Testing Materials, 2001.
• [11] ASTM D3029. Standard test method for impact resistance of rigid plastic sheeting or parts by means of a tup (falling weight), American Society for Testing Materials, 1982.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).