DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

Discrete model in the analysis of residual stresses in unidirectional winding cylinders made of fiber-reinforced plastic

Vestnik MGSU 1/2015
  • Turusov Robert Alekseevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Physical and Mathematical Sciences, Professor, Department of Strength of Materials, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Hamed Memaryanfard - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Strength of Materials, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 27-35

Today works in cosmos and at great sea depths are becoming very current. In order to execute these works tanks with great mass perfection are needed, which represents the relation of the product of pressure and inner volume to its mass. Usually such tanks are usually produced as a cocoon by winding methods, which can be automated. The simplest model of a cocoon is a cylinder with hemispheric blinds at the edges. The radial stresses arise in thick walled composite cylinders due to anisotropic thermal shrinkage during cooling process after curing. It also can lead to formation of radial cracks. The results of the analyses when a material is simplified to a homogenous orthotropic material show a very small residual radial stress value. In this paper we have used discrete model to evaluate residual radial stresses in thick-walled unidirectional filament wound cylinder and the results were compared to the results of homogenous orthotropic model.

DOI: 10.22227/1997-0935.2015.1.27-35

References
  1. Ekel’chik V.S., Klyunin O.S. Novyy podkhod k sozdaniyu oblegchennykh metallo-plastikovykh ballonov vysokogo davleniya dlya szhatykh gazov [New Approach to Creating Lightweight Plastic High Pressure Cylinders for Compressed Gases]. Voprosy materialovedeniya [Problems of Materials Science]. 2003, no. 2 (34), pp. 26—32. (In Russian)
  2. Turusov R.A., Kuperman A.M. Eksperimental’nye issledovaniya vliyaniya masshtabnogo faktora na uprugo-prochnostnye kharakteristiki odnonapravlennykh kolets iz stekloplastika [Experimental Studies of the Scale Factor Influence on the Elastic-Strength Properties of Unidirectional Fiberglass Rings]. Mekhanika kompozitsionnykh materialov i konstruktsiy [Journal on Composite Mechanics and Design]. 1998, vol. 4, no. 3, pp. 62—69. (In Russian)
  3. Turusov R.A., Korotkov V.N., Rogozinskiy A.K., Kuperman A.M., Sulyaeva Z.P. Tekhnologicheskaya monolitnost’ obolochek iz polimernykh kompozitnykh materialov [Monolithic Technology of the Shells of Polymer Composite Materials]. Mekhanika kompozitnykh materialov [Mechanics of Composite Materials]. 1987, no. 6, pp. 1072—1076. (In Russian)
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NUMERICAL AND EXPERIMENTAL STUDIES OF MONOLITHIC CHARACTER OF THICK-WALLED ANISOTROPIC SHELL

Vestnik MGSU 7/2016
  • Memarianfard Mahsa - K.N. Toosi University of Technology Associate Professor, Department of Engineering Ecology, K.N. Toosi University of Technology, 470 Mirdamad Ave. West, 19697, Tehran, Iran; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Turusov Robert Alekseevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Physical and Mathematical Sciences, Professor, Department of Strength of Materials, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Memarianfard Memaryanfard - Moscow State University of Civil Engineering (National Research University) (MGSU) postgraduate student, Department of Strength of Materials, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 36-45

This paper presents t experimental and numerical studies of cracking in the thick-walled filament-wound cylindrical shells made of fiber reinforced plastic during the manufacturing process (specifically, in the process of curing and cooling). The experiments have shown that, when the cylinder is cooled by optimum cooling regime, at the end of the cooling process the obtained cylinder is monolithic and without ring cracking. In this regard, the residual thermal stresses in thick-walled cylinder in the cooling process is calculated using finite element method with account for transient heat conduction and the temperature dependence of the mechanical properties of the material and the viscoelastic behavior of the polymer. The calculations are conducted for cooling in standard and optimum regimes. The results showed that the maximum radial stress in the most dangerous initial area is several times less when the cylinder is cooled down in the optimum regime than when it is cooled in the standard regime.

DOI: 10.22227/1997-0935.2016.7.36-45

References
  1. Ekel’chik V.S., Klyunin O.S. Novyy podkhod k sozdaniyu oblegchennykh metallo-plastikovykh ballonov vysokogo davleniya dlya szhatykh gazov [New Approach to the Creation of Lightweight Reinforced-Plastic High Pressure Cylinders for Compressed Gases]. Voprosy materialovedeniya [Problems of Materials Science]. 2003, no. 2 (34), pp. 26—31. (In Russian)
  2. Turusov R.A., Memaryanfard H. Diskretnaya model’ v analize ostatochnykh napryazheniy odnonapravlennykh namotochnykh tsilindrov iz armirovannogo plastika v protsesse okhlazhdeniya [Discrete Model in the Analysis of Residual Stresses in Unidirectional Winding Cylinders Made of Fiber-Reinforced Plastic]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2015, no. 1, pp. 27—35. (In Russian)
  3. Turusov R.A., Korotkov V.N., Rogozinskiy A.K., Kuperman A.M., Sulyaeva Z.P. Tekhnologicheskaya monolitnost’ obolochek iz polimernykh kompozitnykh materialov [Monolithic Technology of the Shells of Polymer Composite Materials]. Mekhanika kompozitnykh materialov [Mechanics of Composite Materials]. 1987, no. 6, pp. 1072—1076. (In Russian)
  4. Turusov R.A., Korotkov V.N., Rogozinskiy A.K. Temperaturnye napryazheniya v tsilindre iz kompozitnogo materiala v protsesse ego okhlazhdeniya i khraneniya [Thermal Stresses in a Cylinder Made of a Composite Material in the Process of Cooling and Storage]. Mekhanika kompozitnykh materialov [Mechanics of Composite Materials]. 1983, no. 2, pp. 290—295. (In Russian)
  5. Korotkov V.N., Dubovitskiy A.Ya., Turusov R.A., Rozenberg B.A. Teoriya optimizatsii rezhima okhlazhdeniya tolstostennykh izdeliy iz kompozitnykh materialov [Optimization Theory of Cooling Regime of Thick-Walled Products Made of Composite Materials]. Mekhanika kompozitnykh materialov [Mechanics of Composite Materials]. 1982, no. 6, pp. 1051—1055. (In Russian)
  6. Bolotin V.V., Blagonadezhin V.L., Varushkin E.M., Perevozchikov V.G. Ostatochnye napryazheniya v namotochnykh elementakh konstruktsiy iz armirovannykh plastikov [Residual Stresses in Winding Elements of Constructions Made of Reinforced Plastics]. Moscow, Izdatel’stvo TsNII informatsii Publ., 1977. (In Russian)
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