Fast Fracture of Conic Shell Under the Action of Belt Explosive Charge

Altenbach, Holm; Breslavsky, Dmytro; Chernobryvko, Marina; Senko, Alyona; Tatarinova, Oksana

doi:10.1007/978-3-031-18487-1_37

Cited by 7 publications

(2 citation statements)

References 13 publications

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“…The material damage was modeled based on a maximum stress criterion (von Mises criterion) [26]. When the equivalent stresses exceed the limit stresses, σ eq > σ y (T), local destruction of the structural material occurs [27].…”

Section: Mathematical Model Of Dynamic Stress-strain State and Fractu...mentioning

confidence: 99%

Finite-Element Modeling of the Temperature Effect on Extended Avalanche Damage of Gas Main Pipelines

Zhangabay,

Ibraimova,

Ainabekov

et al. 2024

Materials

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The dynamic stress–strain state and fracture of a steel main gas pipe section between supports with a straight-through crack was analyzed with consideration of the temperature effect on changes in the mechanical properties of the pipe material. The numerical solution of the problem was implemented in the ANSYS-19.2/Explicit Dynamics software package. The process of fracture in a section of the gas pipeline “Beineu–Bozoy–Shymkent” with a linear crack in the temperature range of −40 °C to +50 °C at the operating pressure of 7.5 MPa and critical pressure equal to 9.8 MPa was considered. As a result, it was found that at the initial growth of the internal pressure from working pressure to critical pressure, the length of the crack doubled. At the same time, the process had a local characteristic. Further development of the crack had the nature of avalanche fracture and depended on the temperature of the steel pipeline. With increasing temperature, there was also an increase in the length of the crack at the avalanche fracture. Thus, at a temperature of 40 °C, the crack lengthened 67.75-fold; at a temperature of −10 °C, the crack lengthened 68-fold; at a temperature of +20 °C, the crack lengthened 68.25-fold; and at a temperature of +50 °C, the crack lengthened 68.5-fold. In this work, this difference was 75% of the initial crack length. This fact will be used for further development of the technique of strengthening damaged pipe sections using bandages.

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Section: Mathematical Model Of Dynamic Stress-strain State and Fractu...mentioning

confidence: 99%

Finite-Element Modeling of the Temperature Effect on Extended Avalanche Damage of Gas Main Pipelines

Zhangabay,

Ibraimova,

Ainabekov

et al. 2024

Materials

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“…It is shown that the use of shell models is unacceptable. And in studies [15,16], using three-dimensional geometric models, the stressedstrained state of cylindrical [15] and conical shells [16] is determined, where linear structures were not considered. In study [17], only the smooth composite round thread winding was taken into account.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Deformation features of trunk pipelines with composite linings under static loads

Moldagaliyev,

Zhangabay,

Suleimenov

et al. 2023

EEJET

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This paper considers the deformation process of a typical section of a steel trunk pipeline with a defective zone, strengthened with a carbon fiber composite lining, under the influence of stationary internal pressure. Defects in the form of thinning of the pipe thickness and cracks were investigated. The stressed-strained state of the structure at critical pressure was analyzed. The thickness of the composite lining was determined, at which the bandage compensates for the effect of internal pressure on the damaged section of the pipeline. Research was carried out numerically based on finite element modeling in the ANSYS software package. When studying the stressed-strained state of a pipe with a defect of an arbitrary complex shape under the influence of critical pressure, a compensating value was obtained. The result showed that a carbon fiber lining with a thickness of 17 % of the rated thickness of the pipe could completely compensate for the effects of internal pressure in the defect area. In this case, the stresses in the carbon fiber lining were close to minimal. When studying the stressed-strained state of a pipe with a large crack of arbitrary shape at critical pressure, a compensating value was also obtained. It has been established that to compensate for the concentration of internal pressure in the crack zone, the thickness of the composite lining should be at the level of 34 % of the rated thickness of the pipe. In this case, the deformation of the steel pipe in the area of the crack occurs in the elastic region. The exception is the crack tips, where plastic deformations are observed, and stresses arise up to 93 % of the ultimate strength of the pipe steel. At the same time, the stresses in the carbon fiber lining remain close to minimal. Thus, it is recommended to use carbon fiber linings with a thickness of 17 % or more of the rated pipe thickness to bandage damage constituting up to 75 % of the thickness of a steel pipe. To bandage cracks, it is recommended to use carbon fiber linings with a thickness of at least 34 % of the rated pipe thickness

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Influence of impact loading on creep, damage and fracture of metals

Breslavsky,

Tatarinova,

Altenbach

2024

Proc Appl Math and Mech

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The approach to modeling the stress‐strain state during creep damage processes in long beams, which receives an impact loading on their surface, is presented. Both problems are solved by use of the finite element method (FEM). Stress distributions obtained in impact solution are further used as additional initial conditions in the analysis of the effect of impact loading on creep. The creep and damage accumulation in beams with isotropic and transversally isotropic creep properties were analyzed. The essential role of impact loading leading to plastic deformation in creep damage and fracture processes is demonstrated.

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Fast Fracture of Conic Shell Under the Action of Belt Explosive Charge

Cited by 7 publications

References 13 publications

Finite-Element Modeling of the Temperature Effect on Extended Avalanche Damage of Gas Main Pipelines

Finite-Element Modeling of the Temperature Effect on Extended Avalanche Damage of Gas Main Pipelines

Deformation features of trunk pipelines with composite linings under static loads

Influence of impact loading on creep, damage and fracture of metals

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