Publications

2021 (6 Journal Papers)

[58] Rahimi, M.N., Kefal, A., Yildiz, M., 2021.  An improved ordinary-state based peridynamic formulation for modeling FGMs with sharp interface transitions. International Journal of Mechanical Sciences, 197, p.106322.
[57] Kefal, A., Tabrizi, I.E., Yildiz, M., Tessler, A., 2021. A smoothed iFEM approach for efficient shape-sensing applications: Numerical and experimental validation on composite structures. Mechanical Systems and Signal Processing, 152, p.107486.
[56] Kefal, A., Tabrizi, I.E., Tansan, M., Kisa, E., Yildiz, M., 2021. An experimental implementation of inverse finite element method for real-time shape and strain sensing of composite and sandwich structures. Composite Structures, 258, p.113431.
[55] Habibian, A., Sohouli, A., Kefal, A., Nadler, B., Yildiz, M., Suleman, A., 2021. Multi-material topology optimization of structures with discontinuities using peridynamics. Composite Structures, 258, p.113345.
[54] Alexiadis, A., Albano, A., Rahmat, A., Yildiz, M., Kefal, A., Ozbulut, M., Bakirci, N., Garzón-Alvarado, D.A., Duque-Daza, C.A., Eslava-Schmalbach, J.H., 2021. Simulation of pandemics in real cities: enhanced and accurate digital laboratories. Proceedings of the Royal Society A, 477(2245), p.20200653.
[53] Hasim, K.A., Kefal, A., 2021. Isogeometric static analysis of laminated plates with curvilinear fibers based on refined zigzag theory. Composite Structures, 256, p.113097.

 

2020 (10 Journal Papers, 4 Conference Papers)

[52] Kefal, A., 2020. A novel four-node inverse-plate element for shape and stress sensing of laminated composite and sandwich plates. Journal of the Faculty of Engineering and Architecture of Gazi University, 35(4), pp.1767-1781.
[51] Sohouli, A., Kefal, A., Abdelhamid, A., Yildiz, M., Suleman, A., 2020. Continuous density-based topology optimization of cracked structures using peridynamics. Structural and Multidisciplinary Optimization, 62, pp.2375-2389.
[50] Rahimi, M.N., Kefal, A., Yildiz, M., Oterkus, E., 2020. An ordinary state-based peridynamic model for toughness enhancement of brittle materials through drilling stop-holes. International Journal of Mechanical Sciences, 182, p.105773.
[49] Ozdemir, M., Kefal, A., Imachi, M., Tanaka, S., Oterkus, E., 2020. Dynamic fracture analysis of functionally graded materials using ordinary state-based peridynamics. Composite Structures, 244, p.112296.
[48] Kefal, A., Oterkus, E., 2020. Isogeometric iFEM analysis of thin shell structures. Sensors, 20(9), p.2685.
[47] Yildizdag, M.E., Ardic, I.T., Kefal, A., Ergin, A., 2020. An isogeometric FE-BE method and experimental investigation for the hydroelastic analysis of a horizontal circular cylindrical shell partially filled with fluid. Thin-Walled Structures, 151, p.106755.
[46] AlKhateab, B., Tabrizi, I.E., Zanjani, J.S.M., Rahimi, M.N., Poudeh, L.H., Kefal, A., Yildiz, M., 2020. Damage mechanisms in CFRP/HNT laminates under flexural and in-plane shear loadings using experimental and numerical methods. Composites Part A: Applied Science and Manufacturing, 136, p.105962.
[45] Li, M., Kefal, A., Oterkus, E., Oterkus, S., 2020. Structural health monitoring of an offshore wind turbine tower using iFEM methodology. Ocean Engineering, 204, p.107291.
[44] Li, M., Kefal, A., Cerik, B.C., Oterkus, E., 2020. Dent damage identification in stiffened cylindrical structures using inverse Finite Element Method. Ocean Engineering, 198, p.106944.
[43] Abdollahzadeh, M.A., Kefal, A., Yildiz, M., 2020. A comparative and review study on shape and stress sensing of flat/curved shell geometries using C0-continuous family of iFEM elements. Sensors, 20(14), p.3808.
[42] Maruccio, C., Kefal, A., 2020. Electromechanical contact elements for modelling adhesion and interfacial interactions in electrospun nanofibers systems. Procedia Structural Integrity, 28, pp.2142-2147.
[41] Maruccio, C., Montegiglio, P., Kefal, A., 2020. Parameter identification strategy for online detection of faults in smart structures for energy harvesting and sensing. Procedia Structural Integrity, 28, pp.2104-2109.
[40] Maruccio, C., Montegiglio, P., Acciani, G., Kefal, A., 2020. Nonlinear modelling of T-shaped piezoelectric device for structural health monitoring and fluid energy harvesting. International Conference on Electrical, Communication, and Computer Engineering (ICECCE), Istanbul, Turkey, appeared in IEEE Xplore, pp. 1-6.
[39] Rahimi, M.N., Kefal, A., Yildiz, M., 2020. Numerical investigation on effective toughening mechanisms of graded composites. Joint Event: ICCS23 – 23rd International Conference on Composite Structures & MECHCOMP6 – 6th International Conference on Mechanics of Composites, Porto, Portugal.

 

2019 (7 Journal Papers, 8 Conference Papers)

[38] Kefal, A., Sohouli, A., Oterkus, E., Yildiz, M., Suleman, A., 2019. Topology optimization of cracked structures using peridynamics. Continuum Mechanics and Thermodynamics, 31, pp. 1645–1672.
[37] Kefal, A., 2019. An efficient curved inverse-shell element for shape sensing and structural health monitoring of cylindrical marine structures. Ocean Engineering, 188, pp.106262.
[36] Tabrizi, E.I., Kefal, A., Zanjani J.S.M., Akalin, C., Yildiz, M., 2019. Experimental and numerical investigation on fracture behavior of glass/carbon fiber hybrid composites using acoustic emission method and refined zigzag theory. Composite Structures, 223, pp.110971.
[35] Kefal, A., Maruccio, C., Quaranta, G., Oterkus, E., 2019. Modelling and parameter identification of electromechanical systems for energy harvesting and sensing. Mechanical Systems and Signal Processing, 121, pp.890-912.
[34] Hasim, K.A., Kefal, A., Madenci, E., 2019. Isogeometric plate element for unstiffened and blade stiffened laminates based on refined zigzag theory. Composite Structures, 222, pp.110931.
[33] Basoglu, M.F., Zerin Z., Kefal, A., Oterkus, E., 2019. A computational model of peridynamic theory for deflecting behavior of crack propagation with micro-cracks. Computational Materials Science, 162, pp.33-46.
[32] Kefal, A., Hasim, K.A., Yildiz, M., 2019. A novel isogeometric beam element based on mixed form of refined zigzag theory for thick sandwich and multilayered composite beams. Composites Part B: Engineering, 167, pp.100-121.
[31] Basoglu, M.F., Zerin Z., Kefal, A., Oterkus, E., 2019. Increasing toughness by introducing micro-cracks. International Mechanical Engineering Congress & Exposition (IMECE 2019), Salt Lake City, Utah, USA.
[30] Mingyang, L., Kefal, A., Cerik, B., Oterkus, E., 2019. Dent damage prediction by using iFEM. International Mechanical Engineering Congress & Exposition (IMECE 2019), Salt Lake City, Utah, USA.
[29] Kefal, A., Oterkus, E., 2019. Isogeometric iFEM analysis. International Mechanical Engineering Congress & Exposition (IMECE 2019), Salt Lake City, Utah, USA.
[28] Sohouli, A., Kefal, A., Yildiz, M., Suleman, A., 2019. Multi-material topology optimization of structures using peridynamics. The 30th International Conference on Adaptive Structures and Technologies, Montreal, QC, Canada.
[27] Basoglu, M.F., Kefal, A., Hasim, K.A., 2019. Modeling of thick composite structures with an eight-node curved shell element by using the refined zigzag theory. The 7th ECCOMAS Thematic Conference on the Mechanical Response of Composites (COMPOSITES 2019), Girona, Spain.
[26] Ozdemir, M., Kefal, A., Oterkus, E., 2019. Dynamic behaviour of functionally graded plates using bond-based peridynamics. The International Conference on Nonlinear Solid Mechanics, Roma, Italy.
[25] Li, M., Kefal, A., Cerik, M., Oterkus, E., 2019. Structural health monitoring of submarine pressure hull using inverse finite element method. The 7th International Conference on Marine Structures (MARSTRUCT 2019), Dubrovnik, Croatia, appeared in Trends in the Analysis and Design of Marine Structures, Eds. J. Parunov and C. Guedes Soares.
[24] Kefal, A., 2019. Displacement and stress monitoring of a curved stiffened panel based on inverse finite element method. The 7th International Conference on Marine Structures (MARSTRUCT 2019), Dubrovnik, Croatia, appeared in Trends in the Analysis and Design of Marine Structures, Eds. J. Parunov and C. Guedes Soares.

 

2018 (1 Journal Paper, 1 Technical Report, 5 Conference Papers)

[23] Kefal, A., Mayang, J.B., Oterkus, E., Yildiz, M., 2018. Three dimensional shape and stress monitoring of bulk carriers based on iFEM methodology. Ocean Engineering, 147, pp.256-267
[22] Kefal, A., Tessler, A., Oterkus, E., 2018. An Efficient Inverse Finite Element Method for Shape and Stress Sensing of Laminated Composite and Sandwich Plates and Shells. NASA Technical Report, NASA/TP-2018-220079.
[21] Kefal, A., Hasim, K. A., Yildiz, M., 2018. Isogeometric analysis of moderately thick composite beams and plates based on refined zigzag theory. The 28th International Workshop on Computational Mechanics of Materials (IWCMM), Glasgow, UK.
[20] Kefal, A., Sohouli, A., Oterkus, E., Yildiz, M., Suleman, A., 2018. Topology optimization of cracked structures using peridynamics. The 28th International Workshop on Computational Mechanics of Materials (IWCMM), Glasgow, UK.
[19] Kefal, A., Maruccio, C., Quaranta, G., Montegiglio, P., Oterkus, E., 2018. Synchronization-based approach for parameters identification in linear and nonlinear energy harvesting systems dynamics. The 28th International Workshop on Computational Mechanics of Materials (IWCMM), Glasgow, UK.
[18] Basoglu, M.F., Zihni, Z., Kefal, A., Oterkus, E., 2018. Peridynamics simulations on the deflecting propagation of cracks with minor cracks. The 28th International Workshop on Computational Mechanics of Materials (IWCMM), Glasgow, UK.
[17] Erdogan, M., Kefal, A., Dorduncu, M., Barut, A., Yildiz, M., 2018. Isogeometric analysis using peridynamics and XFEM. The 59th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Florida, USA

 

2017 (2 Journal Papers, 6 Conference Papers, 1 Thesis)

[16] Kefal, A., Yildiz, M., 2017. Modelling of sensor placement strategy for shape sensing and structural health monitoring of a wing-shaped sandwich panel using inverse finite element method. Sensors, 17(12), pp.2775.
[15] Kefal, A., Tessler, A., Oterkus, E., 2017. An enhanced inverse finite element method for displacement and stress monitoring of multilayered composite and sandwich structures. Composite Structures, 179, pp.514-540.
[14] Sen, S., Karacuha, E., Oterkus, E., Kefal, A., Erdem, Z., Balci, C., Kerey, I.E., Celik, G., 2017. Deformation risks of the marmaray tunnel and requirement of real-time monitoring based on iFEM method. The International Tunneling Symposium, Istanbul, Turkey
[13] Kefal, A., Mayang, J.B., Oterkus, E., 2017. A novel methodology to determine optimum sensor locations for bulk carriers. The 4th Symposium on Fluid-Structure-Sound Interactions and Control, Tokyo, Japan.
[12] Kefal, A., Yildiz, M., Oterkus, E., 2017. Structural health monitoring of a wing-shaped sandwich panel using iFEM-RZT methodology. The 3rd Joint Turkey-Japan Workshop on Polymeric Composite Materials, Kyoto, Japan.
[11] Kefal, A., Tessler, A., Oterkus, E., 2017. An inverse finite element method based on refined zigzag theory for structural health monitoring of laminated composite and sandwich shell structures. The 14th U.S. National Congress on Computational Mechanics (USNCCM), Montreal, Canada.
[10] Kefal, A., Oterkus, E., 2017. Shape and stress sensing of offshore structures by using inverse finite element method. The 6th International Conference on Marine Structures (MARSTRUCT 2017), Lisbon, Portugal, appeared in Progress in the Analysis and Design of Marine Structures, Eds. C. Guedes Soares and Y. Garbatov.
[9] Kefal, A., Oterkus, E., 2017. Shape sensing of aerospace structures by coupling isogeometric analysis and inverse finite element method. The 58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Texas, USA.
[8] Kefal, A., 2017. Structural Health Monitoring of Marine Structures by using Inverse Finite Element Method. PhD Thesis, The University of Strathclyde, Glasgow, UK.

 

2016 (3 Journal Papers, 1 Conference Paper)

[7] Kefal, A., Oterkus, E., 2016. Displacement and stress monitoring of a Panamax containership using inverse finite element method. Ocean Engineering, 119, pp. 16-29.
[6] Kefal, A., Oterkus, E., Tessler, A., Spangler, J., 2016. A quadrilateral inverse-shell element with drilling degrees of freedom for shape sensing and structural health monitoring. Engineering Science and Technology, an International Journal, 19, pp. 1299-1313.
[5] Kefal, A., Oterkus, E., 2016. Displacement and stress monitoring of a chemical tanker based on inverse finite element method. Ocean Engineering, 112, pp. 33-46.
[4] Kefal, A., Oterkus, E., 2016. Shape- and stress-sensing of a container ship by using inverse finite element method. The Royal Institution of Naval Architects (RINA) International Conference on Smart Ship Technology, London, UK.

 

2015 (2 Conference Papers)

[3] Kefal, A., Hizir, O., Oterkus, E., 2015. A smart system to determine sensor locations for structural health monitoring of ship structures. The 9th International Workshop on Ship and Marine Hydrodynamics (IWSH 2015), Glasgow, UK.
[2] Kefal, A., Oterkus, E., 2015. Structural health monitoring of marine structures by using inverse finite element method. The 5th International Conference on Marine Structures (MARSTRUCT 2015), Southampton, UK, appeared in Analysis and Design of Marine Structures V, Eds. C. Guedes Soares and R. A. Shenoi.

 

2014 (1 Technical Report)

[1] Kefal, A., Oterkus, E., 2014. Hydrodynamic and Structural Analysis. INCASS FP7 Project, University of Strathclyde, Glasgow, UK.