Analysis of Burst Conditions of Shielded Pressure Vessels Subjected to Space Debris Impact

2005 ◽  
Vol 127 (2) ◽  
pp. 179-183 ◽  
Author(s):  
Igor Ye. Telitchev
Keyword(s):  
Fracture Mechanics ◽  
Crack Propagation ◽  
Space Debris ◽  
Failure Mechanisms ◽  
Pressure Vessels ◽  
Unstable Crack ◽  
Nonlinear Fracture Mechanics ◽  
Nonlinear Fracture ◽  
Catastrophic Fracture ◽  
Debris Impact

The present paper summarizes the results obtained from impacts on shielded pressure vessels and analyzes the conditions under which bursting of a shielded pressure vessels occur that are damaged by space debris. The semianalytical model was generated to describe the processes occurring upon impact of a hypervelocity projectile into a shielded vessel. A model capable to describe the failure mechanisms of damaged vessels is suggested. Nonlinear fracture mechanics techniques were used to analyze and predict whether a vessel perforation will lead to mere leakage of gas, or whether unstable crack propagation will occur that leads to catastrophic fracture of the vessel. The validity of the developed model is tested by simulating the experimental results.

Use of linear and nonlinear fracture mechanics for assessing resistance to crack propagation in 15Kh2NMFA structural steel

1978 ◽  
Vol 10 (1) ◽  
pp. 38-42
Author(s):  
A. Ya. Krasovskii ◽  
V. A. Vainshtok ◽  
Yu. A. Kashtalyan ◽  
V. A. Stepanenko ◽  
A. N. Vashchenko ◽  
...  
Keyword(s):  
Fracture Mechanics ◽  
Crack Propagation ◽  
Structural Steel ◽  
Nonlinear Fracture Mechanics ◽  
Nonlinear Fracture ◽  
Linear And Nonlinear

Study of Burst Conditions of Thin-Walled Pressure Vessels Subjected to Hypervelocity Impact

2003 ◽  
Author(s):  
Igor Ye. Telitchev
Keyword(s):  
Space Debris ◽  
Space Station ◽  
Pressure Vessels ◽  
Hypervelocity Impact ◽  
Unstable Crack ◽  
Linear Fracture ◽  
Debris Particles ◽  
Thin Walled ◽  
Catastrophic Fracture ◽  
Onboard System

The present paper is devoted to analysis of burst conditions of thin-walled cylindrical pressure vessels subjected to hypervelocity impact of space debris particles. Two types of gas-filled pressure vessels onboard the International Space Station were considered: inhabited or laboratory pressurized modules and onboard system vessels with a gas under high pressure. The central concern of this study is to determine the border between simple perforation and catastrophic fracture of gas-filled pressure vessels of both types under hypervelocity impact. Non-linear fracture mechanics techniques were used to analyze and predict whether a vessel perforation will lead to mere leakage of gas, or whether unstable crack propagation will occur that could lead to catastrophic fracture of the vessel. Damage patterns and mechanisms leading to unstable crack growth are discussed. A model of fracture of an impact damaged pressure vessel is presented. A developed model was successfully applied to the simulation of experimental results obtained at Ernst-Mach-Institute (Germany).

Complex study of the fracture processes in materials and structures

2018 ◽  
Vol 84 (11) ◽  
pp. 46-51 ◽  
Author(s):  
N. A. Makhutov
Keyword(s):  
Fracture Mechanics ◽  
Crack Resistance ◽  
Scientific Basis ◽  
Intensity Factors ◽  
Nonlinear Fracture Mechanics ◽  
Nonlinear Fracture ◽  
Linear Fracture ◽  
Science Technology ◽  
Fracture Processes

The results of comprehensive studies of multifactor processes, mechanisms and criteria for fracture at a variation of the crack-like defect state, loading conditions and mechanical properties of structural materials carried out in the 20th - 21st centuries are presented on the basis of monographic publications and articles published in the journal “Zavodskaya Laboratoriya. Diagnostika Materialov.” Crack resistance of materials and structures has become a key problem of the material science, technology, design, manufacture and service of structures. Fracture mechanics including estimation of the stress-strain and limiting states in a cracks tip formed a scientific basis of the crack resistance analysis Stress intensity factors (linear fracture mechanics) and strain intensity factors (nonlinear fracture mechanics) are accepted as the basic criteria of those states. The basic computational relations for construction of the fracture diagrammes which link the cracks growth with conditions of a static, cyclic, long-term, dynamic loading are presented. Parameters of computational relations are put into correspondence with the features of fracture processes on nano-, micro-, meso- and macrolevels. Prospects of the research and guidelines of further studing crack resistance are discussed.

Nonlinear Fracture Mechanics Analysis Considering Material Inhomogeneity of Welded Joints

Impact ◽  
2019 ◽  
Vol 2019 (10) ◽  
pp. 105-107
Author(s):  
Hiroshi Okada
Keyword(s):  
Fracture Mechanics ◽  
Solid Mechanics ◽  
Crack Nucleation ◽  
Intensity Factors ◽  
Nonlinear Fracture Mechanics ◽  
Material Inhomogeneity ◽  
Computational Fracture Mechanics ◽  
New Methods ◽  
Nonlinear Fracture ◽  
Mechanics Analysis

Professor Hiroshi Okada and his team from the Department of Mechanical Engineering, Faculty of Science and Technology, Tokyo University of Science, Japan, are engaged in the field of computational fracture mechanics. This is an area of computational engineering that refers to the creation of numerical methods to approximate the crack evolutions predicted by new classes of fracture mechanics models. For many years, it has been used to determine stress intensity factors and, more recently, has expanded into the simulation of crack nucleation and propagation. In their work, the researchers are proposing new methods for fracture mechanics analysis and solid mechanics analysis.

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