Numerical Simulation of Low Velocity Impact on Pin-Reinforced Foam Core Sandwich Panel

Abstract:

The use of sandwich structures is well established in industrial sectors where high stiffness and strength combined with lightweight are required, like in marine, wind turbine and railway applications. However, the vulnerability of sandwich structures to low-velocity impacts limits its use in primary aircraft structures. Pin reinforcement of the foam core enhances the out-of-plane properties and the damage tolerance of the foam core. In this paper, a finite element model is proposed to predict the impact behaviour of pin-reinforced sandwich structure. An approach based on the building block approach was used to develop the model. Multi-scale modelling in the impact region that considers the delamination of the face sheet using cohesive zone elements was employed to increase the accuracy of the simulation. Impact tests were performed to validate the numerical model. A good agreement between numerical and experimental results in terms of contact-force displacement history and failure mode was found.

• Periodical: Key Engineering Materials (Volume 742)
• Pages: 673-680
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.742.673
• Online since: July 2017
• Authors: M. Adli Dimassi*, Axel S. Herrmann
• Keywords: Composite Foam Core Sandwich, Finite Element Analysis, Low-Velocity Impact, Multi-Scale Modelling, Tied Foam Core

References

[1] A.S. Herrmann, P. Zahlen, M.I. Zuardy, Sandwich structures technology in commercial aviation, In: Proceedings of the 7th International conference on sandwich structures, Aalborg, Denmark, 2005, p.13–26.

DOI: 10.1007/1-4020-3848-8_2

[2] M.I. Zuardy, T.B. Block, A.S. Herrmann, Structural analysis of centre box of a vertical tail plane with a side panel from composite foam sandwich, In: Proceedings of Deutscher Luft- und Raumfahrtkongress, Bremen, Germany, 2011, p.1377–1389.

DOI: 10.1007/s13272-011-0009-5

[3] R. Olsson, T.B. Block, Criteria for skin rupture and core shear cracking induced by impact on sandwich panels, Compos. Struct. 125 (2015) 81-87.

DOI: 10.1016/j.compstruct.2015.01.028

[4] A.L. Marasco, Analysis and evaluation of mechanical performance of reinforced sandwich structure: X-Cor and K-Cor, PhD Thesis, Cranfield University, UK, (2005).

[5] M.A. Dimassi, C. Brauner, A.S. Herrmann, Experimental study of the mechanical behaviour of pin reinforced foam core sandwich materials under shear load, In: Proceedings of the 18th Chemnitz Seminar on Materials Engineering WTK-18, Chemnitz, Germany, 2016, pp.268-275.

DOI: 10.1088/1757-899x/118/1/012012

[6] G. Endres, Tied Foam Core Technology and the achieved impact performance of sandwich constructions based on reinforced foam materials, CFK-Valley Stade Convention, Stade, Germany, (2014).

[7] M. John, A. Geyer, R. Schäuble, R. Schlimper, Comparing unreinforced and pin-reinforced CFRP/PMI foam core sandwich structures regarding their damage tolerance behaviour, In: Proceedings of the 20th International conference on Composite Materials, Copenhagen, Denmark, (2015).

DOI: 10.1007/s10443-012-9288-1

[8] F. Han, Y. Yan, J. Ma, Experimental study and progressive failure analysis of stitched foam-core sandwich composites subjected to low-velocity impact, Polym. Compos. (2016).

DOI: 10.1002/pc.23976

[9] F. Xia, X.Q. Wu, J.L. Li, Numerical simulation of impact responses on through-thickness stitched foam core sandwich composite, Appl. Compos. Mater. 20 (2013) 1041-1054.

DOI: 10.1007/s10443-013-9312-0

[10] D. Zenkert, The Handbook of Sandwich Constructions, EMAS Publishing, UK, (1997).

[11] P.C. Zahlen, M. Rinker and C. Heim, Advanced manufacturing of large, complex foam core sandwich panels, In: proceedings of the 8th International Conference on Sandwich Structures, Porto, Portugal, (2008).

[12] Tenax HTS Filamentgarn data sheet, Version 5 30-09-2014, Toho Tenax Europe GmbH Wuppertal, Germany.

[13] HexFlow RTM6 data sheet, December 2014 Document-no. ITA 065f, Hexcel Corporation, Stamford, USA.

[14] Product information ROHACELL HERO, February 2014-edition, Evonik Industries AG, Darmstadt, Germany.

[15] Torayaca T800H data sheet, Document-no. CFA-007, Toray Carbon Fibers America Inc, Santa Ana, CA, USA.

[16] M.A. Dimassi, C. Brauner, A.S. Herrmann, O. Focke, Experimental study of the indentation behaviour of tied foam core sandwich structures, In: Proceedings of the 17th European Conference on Composite Materials, Munich, Germany, (2016).

DOI: 10.1177/1099636217748577

[17] T.B. Block, Analysis of the mechanical response of impact loaded composite sandwich structures with focus on foam core shear failure, PhD Thesis, University of Bremen, Germany, (2014).

[18] Z. Hashin, Failure criteria for unidirectional fiber composites, J. Appl. Mech. 47 (1980) 329-334.

DOI: 10.1115/1.3153664

[19] S. Warhus, Experimentelle Kennwertermittlung und numerische Simulation des Crushing-Verhaltens von Pin-verstärkten Sandwichstrukturen, Master thesis, University of Bremen, Germany, (2015).