Abstract
There is a growing demand to comprehend the orthotropic properties of composite sandwich structures. Indentation stress is often experienced on the surfaces of sandwich beams, particularly during maintenance procedures. The objective of the present investigation is to evaluate the performance of these structures under such circumstances. The mechanical behavior of the composite sandwich structures is assessed by analyzing the results of edgewise compression and flexure tests conducted after indentation. The experiments encompass variations in carbon composite face thicknesses, core types, and indentation depths. The overall outcomes highlight a notable effect of indentation, particularly in the case of foam-core sandwiches, which exhibit lower elasticity compared to honeycomb-core sandwiches. Interestingly, the specific properties of both foam and honeycomb core beams, relative to their weight ratios, are found to be comparable. Furthermore, the results demonstrate that sandwich beams with reduced face material display lower stiffness but higher flexibility, enabling them to greater resistance to damage.
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References
F. C. Campbell, Structural Composite Materials, ASM International (2010).
B. Agarwal, Broutman, J. Lawrence and K. Chandrashekhara, Analysis and Performance of Fiber Composites, 4th Ed., Wiley (2017).
G. H. Staab, Laminar Composites, 2nd, Butterworth-Heinemann (2015).
D. B. Miracle and S. L. Donaldson, ASM Handbook, Composites, ASM International (2001).
T. Nettles and M. J. Douglas, A Comparison of Quasi-Static Testing to Low-Velocity Impact Testing, American Society for Testing and Materials International, ASTM STP 1416 (2002) 116–130.
V. Rizov, A. Shipsha and D. Zenkert, Indentation study of foam core sandwich composite panels, Composite Structures, 69 (1) (2005) 95–102.
Johnson and E. A. Flores, Quasi-static indentation and lowvelocity impact on polymeric foams and CFRP sandwich panels with polymeric foam cores, school of mechanical, aerospace and civil engineering, Ph.D. Dissertation, University of Manchester (2009).
M. Sadighi, H. Pouriayevali and M. Saadati, Indentation Energy in Bending of Sandwich, Beams with Composite Laminated Faces and Foam Core, Dept. of Mechanical Engineering, Amirkabir University of Tech., Tehran, I.R. Iran (2022) http://www.escm.eu.org/docs/eccm13/1906.pdf.
N. Elzayady and E. Elghandour, Design optimization to improve the performance of the aircraft composite structures, Journal of Mechanical Science and Technology, 35 (10) (2021) 4381–4388.
N. Elzayady and E. Elghandour, Compression behavior of composite sandwich panels with corrugated core, International Journal of Sustainable Materials and Structural, 5 (3) (2021) 193–205.
N. Elzayady and E. Elghandour, Compression capacity of corrugated core hybrid composite sandwich structure, Key Engineering Materials, 821 (2019) 47–53.
E. Elghandour and N. Elzayady, Comparison between honeycomb and composite corrugated cores in sandwich panels under compression loading, International Journal of Sustainable Material and Structural Systems, 5 (1–2) (2021) 179–192.
N. E. Elzayady and E. I. Elghandour, Fracture resistance of composite structures from hemp bio-fibers, Journal of Advanced Engineering Trends, 40 (2) (2021) 137–147.
A. M. Elhabak, A. Nabil, M. Adly and N. Elzayady, Behavior of hybrid composite structure under low impact velocity, Journal of Engineering and Applied Sciences, 15 (14) (2020) 2772–2780.
Toray Advanced Composites, Toray TC275-1, Datasheet TORAY_TC275-1_PDS_v.3.0, Toray Advanced Composites (2020).
Euro-Composites, Mechanical Properties of ECA Honeycomb (Metric Test Specimen Thickness 12.7 mm), Euro-Composites (2002) EC 536-13e.
Diab International, Divinycell H., Grade Technical Manual Datasheet, H Manual, Diab International (2021).
Mitsubishi Chemical, Newport 102 Epoxy Film Adhesive Datasheet, Mitsubishi Chemical (2018) PL- 102-011718.
ASTM C364/C364M-16, Standard Test Method for Edgewise Compressive Strength of Sandwich Constructions, ASTM International, West Conshohocken, PA (2016).
ASTM C393/C393M-00, Standard Test Method for Flexural Properties of Sandwich Constructions, ASTM International, West Conshohocken, PA (2000).
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Marius Jatulis is a postgraduate student at the Mechanical Engineering Department of California Polytechnic State University, San Luis Obispo (Cal Poly SLO), USA. He completed his undergraduate studies at the same university. Marius obtained his Master’s Degree in 2022.
Eltahry Elghandour is a Professor in the Mechanical Engineering Department at California Polytechnic State University, San Luis Obispo (Cal Poly SLO), USA. He holds an M.Sc. and Ph.D. in Mechanical Design and Production Engineering, both obtained from Helwan University in 1989 and 1995, respectively. Professor Elghandour specializes in composite materials analysis, manufacturing, fatigue and fracture mechanics, and advanced finite element analysis. With a rich background in teaching and research, he has accumulated twenty-seven years of experience at the university level. phone: 805-756-1728.
Nagwa Elzayady is an Associate Professor of Mechanical and Aerospace Engineering at the Institute of Aviation Engineering and Technology (IAET) in Giza, Egypt. She holds an M.Sc. and Ph.D. in Mechanical Design and Production Engineering, both obtained from Cairo University in 2001 and 2012, respectively. Dr. Elzayady specializes in engineering materials analysis, composite materials, manufacturing, and testing. She has amassed ten years of experience in teaching and research at Cairo University (2000–2009) and another ten years at IAET (2010-2020). Additionally, she gained professional experience spanning from 1994 to 2004 at the Arab Organization for Industrialization (AOI) in Egypt. phone: +2 01022399953.
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Jatulis, M., Elghandour, E. & Elzayady, N. Evaluation of the mechanical properties of aircraft composite materials after indentation. J Mech Sci Technol 37, 5813–5821 (2023). https://doi.org/10.1007/s12206-023-1020-6
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DOI: https://doi.org/10.1007/s12206-023-1020-6