DOI: https://doi.org/10.15587/1729-4061.2017.108190

Study of the process of shape-formation of ribbed double-curvature panels by local deforming

Valeriy Sikulskiy, Valentina Kashcheyeva, Yuri Romanenkov, Alexander Shapoval

Abstract


Accuracy of double-curvature ribbed panels obtained by multipoint local deformation using the proposed procedure of distribution of local actions was studied. As equipment for local action, an innovative die was used enabling the rib portion to be bent together with the adjacent sheet in both directions and perform shrinking (shortening) or stretching (extension) of this section along the rib axis. Features of making double-curvature panels with an irregular internal structure using local shaping by bending and shrinking (stretching) were considered. A procedure was described for calculating the number of local actions necessary to obtain panels of the required shape and size. The results obtained in testing the procedure for distributing local actions on samples and the full-scale panel of an aircraft fuselage of a transport category were presented. An experimental study of accuracy of the obtained dimensions by comparison of measurements of height of the points in the shaped panel with calculated values of the panel coordinates was carried out. Experimental studies of accuracy of the panel face shape showed that the maximum deviation after applying the calculated actions was 1.48 mm for longitudinal sections and 1.67 mm for transverse ones. Individual deviations of the shape, for example deviations of the free edges and curvature near the ends of the ribs required refinement works after which the shape deviations did not exceed 0.3 mm. Basic recommendations were elaborated for making double-curvature (biconvex, biconcave, convexo-concave and concavo-convex) panels. 


Keywords


double curvature; irregular internal structure; shrinking; plastic deformation; flexure

References


Verichev, S. N., Maksimenko, V. N., Levyakov, S. V. (2009). Forming of monolithic stiffened double-curvature Panels of Aircraft Structures. Proceedings of 2009 International Forum on Strategic Technologies, 185–187.

Sikulskiy, V. T. (2013). Forming of monolithic panels of complex shapes. Aerospace engineering and technology, 5-102, 15–19.

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Pashkov, A. E. (2014). Technological complex for the formation of long-length panels and plating on the basis of domestic equipment. Izvestiya of the Samara Scientific Center of the Russian Academy of Sciences, 16 (1 (5)), 1528–1536.

Yan, Y., Wang, H., Wan, M. (2011). Prediction of stiffener buckling in press bend forming of integral panels. Transactions of Nonferrous Metals Society of China, 21 (11), 2459–2465. doi: 10.1016/s1003-6326(11)61037-6

Dragobetskii, V. V., Shapoval, A. A., Zagoryanskii, V. G. (2015). Development of elements of personal protective equipment of new generation on the basis of layered metal compositions. Steel in Translation, 45 (1), 33–37. doi: 10.3103/s0967091215010064

Sikulskiy, V. T. (2014). Shaping of panels with longitudinal finning of local flexible with planting (wiring). Bulletin of the National Technical University "Kharkov Polytechnic Institute", 5 (1048), 73–80.

Sikulskiy, V. T., Taranenko, M. E., Kashcheeva, V. Yu., Sikulskyi, S. V. (2017). Calculation of the basic parameters of symmetrical shaping of monolithic ribbed panels of double curvature by successive deformation. Processing of materials by pressure, 1 (44), 143–148.


GOST Style Citations


Verichev, S. N. Forming of monolithic stiffened double-curvature Panels of Aircraft Structures [Text] / S. N. Verichev, V. N. Maksimenko, S. V. Levyakov // Proceedings of 2009 International Forum on Strategic Technologies, 2009. – P. 185–187.

Sikulskiy, V. T. Forming of monolithic panels of complex shapes [Text] / V. T. Sikulskiy // Aerospace engineering and technology. – 2013. – Vol. 5-102. – P. 15–19.

Oleinikov, A. I. Integrated design of monolithic panel manufacturing processes [Text] / A. I. Oleinikov, A. I. Pekarsh. – Moscow: Ecom, 2009. – 112 p.

Yu, Y. FEM modelling for press bend forming of doubly curved integrally stiffened aircraft panel [Text] / Y. Yan, H. Wang, M. Wan // Transactions of Nonferrous Metals Society of China. – 2012. – Vol. 22. – Р. s39–s47. doi: 10.1016/s1003-6326(12)61681-1 

Yue, F. Knowledge base research on the incremental press bending technology of the integral wing-skin panel [Text] / F. Yue, J. Liu, S. Zhang, Y. Zeng // Materials Science and Technology. – 2008. – Vol. 16, Issue 3. – Р. 306–309.

Pashkov, A. E. Technological complex for the formation of long-length panels and plating on the basis of domestic equipment [Text] / A. E. Pashkov // Izvestiya of the Samara Scientific Center of the Russian Academy of Sciences. – 2014. – Vol. 16, Issue 1 (5). – P. 1528–1536.

Yu, Y. Prediction of stiffener buckling in press bend forming of integral panels [Text] / Y. Yan, H. Wang, M. Wan // Transactions of Nonferrous Metals Society of China. – 2011. – Vol. 21, Issue 11. – Р. 2459–2465. doi: 10.1016/s1003-6326(11)61037-6 

Dragobetskii, V. V. Development of Elements of Personal Protective Equipment of New Generation on the Basis of Layered Metal Compositions [Text] / V. V. Dragobetskii, A. A. Shapoval, V. G. Zagoryanskii // Steel in Translation. – 2015. – Vol. 45, Issue 1. – P. 33–37. doi: 10.3103/s0967091215010064 

Sikulskiy, V. T. Shaping of panels with longitudinal finning of local flexible with planting (wiring) [Text] / V. T. Sikulskiy // Bulletin of the National Technical University "Kharkov Polytechnic Institute". – 2014. – Vol. 5, Issue 1048. – P. 73–80.

Sikulskiy, V. T. Calculation of the basic parameters of symmetrical shaping of monolithic ribbed panels of double curvature by successive deformation [Text] / V. T. Sikulskiy, M. E. Taranenko, V. Yu. Kashcheeva, S. V. Sikulskyi // Processing of materials by pressure. – 2017. – Vol. 1, Issue 44. – P. 143–148.







Copyright (c) 2017 Valeriy Sikulskiy, Valentina Kashcheyeva, Yuri Romanenkov, Alexander Shapoval

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ISSN (print) 1729-3774, ISSN (on-line) 1729-4061