Dynamic Fracture in Thin Shells Using Meshfree Method

Shie, Y.

doi:10.1155/2014/262494

Cited by 5 publications

(3 citation statements)

References 68 publications

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“…Song et al [132] presented an extended FE method for dynamic fracture in thin-walled structures subjected to detonation load; they implemented the proposed method on discrete Kirchho triangular shell elements. Shie [133] used mesh-free formulations for dynamic fracture modeling in thin tubes subjected to detonation loading while Pagani & Perego [134]proposed a computational explicit dynamics FE approach for fracture simulation in thin shells using directional cohesive interface elements, in which solid-shell elements were used for discretization. Malekan [135] investigated crack propagation in a tube under internal detonation using cohesive elements and compared their experimental results with literature values.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Deformation and fracture of cylindrical tubes under detonation loading: A review of numerical and experimental analyses

Malekan

Khosravi

Cimini

2019

International Journal of Pressure Vessels and Piping

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The dynamic load in tubes due to detonation has a number of applications, such as in oil pipeline systems and pulse detonation engines. Various experimental, analytical, and numerical investigations have been conducted to study the mechanical, thermo-mechanical, and fracture behavior of tubes under internal detonation loads. Regarding numerical analysis, different approaches such as interface cohesive element, mesh-free, and extended finite element methods have been used to model the propagation of crack(s) in a tube. This paper presents a review of relevant literature pertaining to numerical and experimental analyses of detonation-driven deformation and fracture, and of studies based on the analytical investigation of moving loads in detonation tubes. The corresponding findings are discussed in detail, and possible avenues for future research are highlighted.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Deformation and fracture of cylindrical tubes under detonation loading: A review of numerical and experimental analyses

Malekan

Khosravi

Cimini

2019

International Journal of Pressure Vessels and Piping

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“…The MPM adopts the dual description of a Lagrangian particle and an Eulerian grid, combining the advantages of Lagrangian and Eulerian methods [28,29]. It eliminates the numerical difficulties arising from grid distortion and nonlinear convection terms [30][31][32][33][34]. As the Lagrangian particle mass does not change in the calculation process, the mass conservation condition is always satisfied in the MPM.…”

Section: Introductionmentioning

confidence: 99%

A Combustion Model for Explosive Charge Affected by a Bottom Gap in the Launch Environment

Wu,

Chen,

et al. 2024

CMES

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Launch safety of explosive charges has become an urgent problem to be solved by all countries in the world as launch situation of ammunition becomes consistently worse. However, the existing numerical models have different defects. This paper formulates an efficient computational model of the combustion of an explosive charge affected by a bottom gap in the launch environment in the context of the material point method. The current temperature is computed accurately from the heat balance equation, and different physical states of the explosive charges are considered through various equations of state. Microcracks in the explosive charges are described with respect to the viscoelastic statistical crack mechanics (Visco-SCRAM) model. The method for calculating the temperature at the bottom of the explosive charge with respect to the bottom gap is described. Based on this combustion model, the temperature history of a Composition B (COM B) explosive charge in the presence of a bottom gap is obtained during the launch process of a 155-mm artillery. The simulation results show that the bottom gap thickness should be no greater than 0.039 cm to ensure the safety of the COM B explosive charge in the launch environment. This conclusion is consistent with previous results and verifies the correctness of the proposed model. Ultimately, this paper derives a mathematical expression for the maximum temperature of the COM B explosive charge with respect to the bottom gap thickness (over the range of 0.00-0.039 cm), and establishes a quantitative evaluation method for the launch safety of explosive charges. The research results provide some guidance for the assessment and detection of explosive charge safety in complex launch environments.

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“…In order to overcome the weakness, more alternatives methods are proposed, such as the meshless method [3][4][5], the smoothed finite element method [6,7], and the polygonal finite element method [7,8]. The scaled boundary finite element method (SBFEM) [9] is a semi-analytical method that attempts to fuse the advantages and characteristics of FEM and the boundary element method (BEM) into one new approach.…”

Section: Introductionmentioning

confidence: 99%

A Polygonal Scaled Boundary Finite Element Method for Solving Heat Conduction Problems

Yang¹,

Zhang²,

Yang³

et al. 2021

Preprint

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This paper presents a steady-state and transient heat conduction analysis framework using the polygonal scaled boundary finite element method (PSBFEM) with polygon/quadtree meshes. The PSBFEM is implemented with commercial finite element code Abaqus by the User Element Subroutine (UEL) feature. The detailed implementation of the framework, defining the UEL element, and solving the stiffness/mass matrix by the eigenvalue decomposition are presented. Several benchmark problems from heat conduction are solved to validate the proposed implementation. Results show that the PSBFEM is reliable and accurate for solving heat conduction problems. Not only can the proposed implementation help engineering practitioners analyze the heat conduction problem using polygonal mesh in Abaqus, but it also provides a reference for developing the UEL to solve other problems using the scaled boundary finite element method.

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Dynamic Fracture in Thin Shells Using Meshfree Method

Cited by 5 publications

References 68 publications

Deformation and fracture of cylindrical tubes under detonation loading: A review of numerical and experimental analyses

Deformation and fracture of cylindrical tubes under detonation loading: A review of numerical and experimental analyses

A Combustion Model for Explosive Charge Affected by a Bottom Gap in the Launch Environment

A Polygonal Scaled Boundary Finite Element Method for Solving Heat Conduction Problems

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