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R.S. Katili¹, I. Katili¹, S. Natarajan² and S.P.A. Bordas^3,4

¹Department of Civil Engineering, University of Indonesia, Depok, Indonesia
²Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai, India
³Faculté des Sciences, de la Technologie et de la Communication, University of Luxembourg, Luxembourg
⁴Department of Engineering, University of Exeter, United Kingdom

doi:10.4203/ccc.14.15.2

R.S. Katili, I. Katili, S. Natarajan, S.P.A. Bordas, "Improved DKMT18 and DKMQ24 Shell Elements With Pseudo-Curvatures", in P. Iványi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Sixteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 14, Paper 15.2, 2026, doi:10.4203/ccc.14.15.2

Keywords: shell, Reissner-Mindlin-Naghdi shell model, triangular and quadrilateral curved shell elements, 3-node and 4-node finite elements, shear locking free, mixed transverse shear strains, pseudo-curvatures.

Abstract

This paper presents the improvement of the 3-node triangular DKMT18 (2020) and 4-node quadrilateral DKMQ24 (2015) curved shell element by applying pseudo-normal vectors to the corner vertices, which are then used to obtain the pseudo-curvatures. The improved DKMT18 and DKMQ24 curved shell element represents full coupling of membrane-bending in bending strains. The assumed transverse shear strains are used to avoid shear locking. Both elements pass the patch tests, are locking-free, have a proper rank, perform well, provide convergent results, and show significant improvement in the twisted beam and Raasch’s hook problem compared to the previous version.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 14 PROCEEDINGS OF THE SIXTEENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: P. Iványi, J. Kruis and B.H.V. Topping Paper 15.2 Improved DKMT18 and DKMQ24 Shell Elements With Pseudo-Curvatures R.S. Katili¹, I. Katili¹, S. Natarajan² and S.P.A. Bordas^3,4 ¹Department of Civil Engineering, University of Indonesia, Depok, Indonesia ²Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai, India ³Faculté des Sciences, de la Technologie et de la Communication, University of Luxembourg, Luxembourg ⁴Department of Engineering, University of Exeter, United Kingdom doi:10.4203/ccc.14.15.2 Full Bibliographic Reference for this paper R.S. Katili, I. Katili, S. Natarajan, S.P.A. Bordas, "Improved DKMT18 and DKMQ24 Shell Elements With Pseudo-Curvatures", in P. Iványi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Sixteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 14, Paper 15.2, 2026, doi:10.4203/ccc.14.15.2 Keywords: shell, Reissner-Mindlin-Naghdi shell model, triangular and quadrilateral curved shell elements, 3-node and 4-node finite elements, shear locking free, mixed transverse shear strains, pseudo-curvatures. Abstract This paper presents the improvement of the 3-node triangular DKMT18 (2020) and 4-node quadrilateral DKMQ24 (2015) curved shell element by applying pseudo-normal vectors to the corner vertices, which are then used to obtain the pseudo-curvatures. The improved DKMT18 and DKMQ24 curved shell element represents full coupling of membrane-bending in bending strains. The assumed transverse shear strains are used to avoid shear locking. Both elements pass the patch tests, are locking-free, have a proper rank, perform well, provide convergent results, and show significant improvement in the twisted beam and Raasch’s hook problem compared to the previous version. download the full-text of this paper (PDF, 10 pages, 820 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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