BSU Bulletin. Mathematics, Informatics
Bibliographic description:
, DETERMINATION OF CRITICAL LOAD OF INTERLAYER DEFECT ARISING FROM RING COMPRESSION // BSU Bulletin. Mathematics, Informatics. - 2019. №2. . - С. 72-82.
Title:
DETERMINATION OF CRITICAL LOAD OF INTERLAYER DEFECT ARISING FROM RING COMPRESSION
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Annotation:
The article presents a solution to the problem of nonlinear stability of thin delami- nations located near the inner surface of a compressed ring. Near the inner surface the multilayer ring has one interlayer defect of the delamination type. This defect loses stability when the ring is compressed. Such a deformation is caused by a high concen- tration of interlayer stress at the front of the defect. As the load is increased the buckled area increases to a critical size. This kind of loss of stability is called “delamination of thin layer”. We have obtained the calculation results using the approximate theory of shallow arcs, and determined the critical load. The analytical expressions are obtained for deflections at the initial stage of supercritical deformation. We have modeled a ring consisting of two thin volumetric shells in the form of rings in the ANSYS system. The results of numerical calculation by the finite element method are presented for com- parison with the obtained analytical calculations.
Keywords:
delamination; defect; ring; critical load; deflection; stability; nonlinear- ity; shallow arc; finite element method; model.
List of references:
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Bokhoeva L. A., Bochektueva E. B. Modelirovanie i raschet ustoichivosti tonkikh otsloenii v sfericheskoi obolochke [Modeling and Calculation of Stability of Thin Delaminations in a Spherical Shell]. Vestnik Buryatskogo gosudarstvennogo uni- versiteta. Matematika, informatika. 2018. No. 2. Pp.77–84. DOI: 10.18101/2304-5728- 2018-2-83-90.
Bokhoeva L. A., Rogov V. E., Chermoshentseva A. S., Lobanov D. V. Stability and Process of Destruction of Compressed Plate of Layered Composite Materials with Defects. Innovative Technologies in Engineering. Proc. VII Int. Sci. Practical Conf. Tomsk, 2016. Pp. 12077. DOI: https://doi.org/10.2991/avent-18.2018.10.
Bokhoeva L. A., Damdinov T. A. Opredelenie kriticheskikh nagruzok ener- geticheskim metodom s uchetom deformatsii sdviga [Determination of Critical Loads by the Energy Method Taking into Account Deformation Shift]. Vestnik Kazanskogo gosudarstvennogo tekhnicheskogo universiteta imeni A. N. Tupoleva. 2006. No. 1. Pp. 3–7.
Bokhoeva L. A., Pnev A. G., Chermoshentseva A. S. Ispytanie na prochnost koltsevykh obraztsov iz sloistykh kompozitsionnykh materialov s mezhsloinymi defek- tami [Tests for Strength of Ring Samples from Layered Composite Materials with In- terlayer Defects]. Vestnik Buryatskogo gosudarstvennogo universiteta. 2011. No. 9. Pp. 230–236.
Bokhoeva L. A. Issledovanie ustoichivosti plastin iz sloistykh kompozitsionnykh materialov s defektami tipa skvoznoe otsloenie [Stability Study of Plates from Layered Composite Materials with Defects of the Through Delimination Type]. Izvestiya vysshikh uchebnykh zavedenii. Mashinostroenie. 2007. No. 2. Pp. 7–16.
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