Effect of scale, geometry, and filler on the strength of steel vessels to internal pulsed loads

Tsypkin, V. I.; Ivanov, A. G.; Минеев, В. П.; Shitov, A. T.

doi:10.1007/bf01119208

Cited by 21 publications

(8 citation statements)

References 3 publications

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“…The Wilkins method [14] was used to numerically analyze a series of experiments [11] on the behavior of closed steel cylindrical shells with flat (the shell material is steel 17 GS) and hemispherical (the shell material is steel 20) bottoms filled with the air under atmospheric pressure, loaded by exploding a spherical explosive charge inside them.…”

Section: Investigation Resultsmentioning

confidence: 99%

“…The loading conditions, the computational results and their comparison with the experimental data are presented in Figs. 4-7 and Tables 2, 3, where 0 R is internal radius of the shells; 0 δ is wall thickness; m is mass of the explosive charge; ξ is parameter characterizing the ratio of the mass of the charge to that of the shell (in [11] parameter ξ is a measure of strength of the vessels). Table 3 shows maximal damage value max ω chosen from the distribution diagram of the damage value through the shell thickness.…”

Section: Investigation Resultsmentioning

confidence: 99%

“…In the present paper, a version of defining relations of MDM has been developed to describe dynamic deformation and failure of shells under internal explosive loading. The reliability of the developed defining relations of MDM was assessed by comparing the experimental and numerical data on the dynamic deformation and failure of spherical and cylindrical shells under internal explosive loading [10,11], which corroborated the adequacy of modeling and determining material parameters.…”

Section: Epj Web Of Conferences 183 (2018)mentioning

confidence: 91%

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Modeling dynamic deformation and failure of thin-walled structures under explosive loading

et al. 2018

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In the framework of mechanics of damaged media, behavior of thin-walled structures under pulsed loading is described. Account is taken of the interaction of the processes of dynamic deformation and damage accumulation, as well as of the main characteristic features of the dynamic failure process: the multi-staged character, nonlinear summation of damage, stressed state history and accumulated damage level. The chosen system of equations of thermo-plasticity describes the main effects of dynamic deformation of the material for random deformation trajectories. The equations of state are based on the notions of yield surface and the principle of gradientality of the plastic strain rate vector. Evolutionary equations of damage accumulation are written for a scalar parameter of damage level and are based on energy principles. The effect of the stressed state type and the accumulated damage level on the processes of nucleation, growth and merging of microdefects is accounted for. Results of numerically modelling processes of dynamic deformation and failure of spherical and closed cylindrical shells with plane and hemispherical bottoms under single pulsed explosive loading are presented. The computational results are compared with experimental data.

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Section: Investigation Resultsmentioning

confidence: 99%

Section: Investigation Resultsmentioning

confidence: 99%

Section: Epj Web Of Conferences 183 (2018)mentioning

confidence: 91%

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Modeling dynamic deformation and failure of thin-walled structures under explosive loading

et al. 2018

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“…Results of experiments [1][2][3][4] with various-scale, geometrically similar, spherical and cylindrical shells of structural steels under internal explosive loading (with the cavity filled with water and air) unambiguously indicate the possibility of the occurrence of a strong scale effect of an energetic nature (SEEN) [5], which decreases the ultimate specific load-bearing capacity ξ [the ratio of the ultimate mass of the high explosive (HE) whose explosion results in no shell failure to the shell mass] and deformability with a geometrically similar increase in the shell dimensions. For steel structures, the SEEN becomes especially pronounced in going from cylindrical to spherical shell [1,2] because of a decrease in shell plasticity and deformability with an increase in the stress biaxiality and specific elastic-strain energy.…”

Section: Introductionmentioning

confidence: 99%

Criterion for Selecting Composite Materials for Explosion Containment Structures (Review)

Федоренко

Syrunin

Ivanov

2005

Combust Explos Shock Waves

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Experimental data on the dynamic response and strength of simple shells of fiber composites are used to justify the choice of these materials for the load-bearing shells of blast-proof structures. It is shown that in such structures composites are preferred to homogeneous metal alloys (structural steels) to eliminate strong scale effects of an energetic nature. A criterion for selecting fibers is proposed and justified experimentally, and reinforcement patterns are determined to obtain optimal (in the strength-mass ratio) compositions for the load-bearing shells of blast-proof containers and chambers.

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“…To demonstrate the reliability and accuracy of our numerical technique, we will compare the numerical results obtained using Eqs. (1)-(8) with experimental data [8] on the dynamic deformation of closed compound steel shells (hemisphere plus cylinder) after detonation of an internal spherical explosive charge. To determine the explosive pressure profile on the inside surface of the structure, the following empirical dependence was used: , where R 0 is the inner radius of the cylindrical and spherical parts of the structure; L is the total length of the structure; and L c is the length of the cylindrical part.…”

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confidence: 99%

Dynamics of reinforced compound shells under nonstationary loads

et al. 2006

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The nonstationary behavior of reinforced compound structures is analyzed within the framework of the geometrically nonlinear Timoshenko theory of shells and rods. The numerical method used to solve the problem is based on the finite-difference approximation of the original differential equations. The dynamic behavior of a reinforced compound structure under nonstationary loading is demonstrated by way of a numerical example. The numerical results are compared with experimental data Keywords: reinforced discrete shell, Timoshenko shell theory, nonstationary loading, numerical method Introduction. Reinforced compound shells are complex, spatially inhomogeneous, elastic structures that include discrete inclusions and areas where the geometrical and material parameters change. These factors complicate problem formulations. In particular, the partial differential equations describing the stress-strain state of the original structures include discontinuities of the first kind of the strain and stress components. This is why special numerical algorithms have been developed to adequately simulate wave processes in shells with singularities.The handbook [4] presents algorithms and programs for design of compound shells under stationary and dynamic loads. The dynamic behavior of compound shells under nonstationary loads is analyzed in the monograph [5]. The nonstationary behavior of reinforced shells of revolution with discrete ribs is studied in [2]. The axisymmetric nonlinear vibrations of discretely reinforced conical shells are examined in [9]. Dynamic problems for reinforced ellipsoidal shells are solved in [13]. Initial deflections are accounted for in [11] in solving dynamic problems for discretely reinforced cylindrical shells under nonstationary loads. The nonaxisymmetric forced vibrations of sandwich cylindrical shells with ribbed core are studied in [12].Here we formulate dynamic problems for compound shells and outline a numerical algorithm for solving them. The algorithm is further used to solve model problems.1. Problem Formulation. Governing Equations. Consider a compound inhomogeneous structure consisting of a compound shell and ring ribs rigidly fixed to it along contact lines (the ribs are supposed to be placed along the coordinate line α 2 ) [1]. Forced vibrations of the structure are modeled by a hyperbolic system of nonlinear differential equations of the Timoshenko theory of shells and curvilinear rods [2]. The variation of the displacements of the shell components across the thickness is described in the coordinate frame ( , ) s z by the formulas

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Effect of scale, geometry, and filler on the strength of steel vessels to internal pulsed loads

Cited by 21 publications

References 3 publications

Modeling dynamic deformation and failure of thin-walled structures under explosive loading

Modeling dynamic deformation and failure of thin-walled structures under explosive loading

Criterion for Selecting Composite Materials for Explosion Containment Structures (Review)

Dynamics of reinforced compound shells under nonstationary loads

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