47 Result(s)
within
Article
Ji** Ma
Engineering
Automotive Engineering
Characterization and Evaluation of Materials
Classical Mechanics
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Article
Analysis of a cracked harmonic substrate under a rigid punch
The study of the mechanical action between a punch and a cracked substrate has some theoretical guidance for the material protection. So the coupling problem of a cracked semi-infinite harmonic substrate under...
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Adaptive coupling peridynamic least-square minimization with finite element method for fracture analysis
This study presents an adaptive coupling peridynamic least-square minimization with the finite element method (PDLSM-FEM) for fracture analysis. The presented method utilizes the PDLSM modeling discontinuities...
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Interaction of dislocations and cracks in grains based on discrete dislocations
A interaction model between discrete dislocation emission and the grain boundary at the crack tip of microscale grain is described. When the dislocation emission condition is satisfied, dislocations will be em...
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Analysis of symmetric and skew-symmetric weight functions for a semi-infinite interfacial crack in transversely isotropic piezoelectric bimaterials
This paper presents an analysis of symmetric and skew-symmetric weight functions for in-plane interfacial crack problems in piezoelectric bimaterials. The symmetric weight function matrix is obtained by means ...
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Numerical study of shrinkage cracking in concrete and concrete repair systems
The shrinkage cracking processes in a cement-based composite, which include crack initiation, propagation and coalescence, as well as diffusion-damage coupling, are numerically studied using a mesomechanical n...
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An improved numerical manifold method incorporating hybrid crack element for crack propagation simulation
The numerical manifold method (NMM) simulates continuous and discontinuous problems in a unified framework; thus NMM has advantages in analysing crack propagation. However, calculation of the stress intensity ...
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EBSD characterization of secondary microcracks in the heat affected zone of a X100 pipeline steel weld joint
In order to get better understanding of the mechanism of cleavage fracture in the heat affected zone (HAZ) of X100 pipeline steel, secondary microcracks underneath the brittle fracture surface of a Charpy impa...
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Anti-plane Yoffe-type crack in ferroelectric materials
Extending the polarization saturation (PS) model and Yoffe crack model for ferroelectric materials, a moving PS model is proposed to study the problems of crack propagation considering the electrical nonlinear...
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Modeling complex crack problems using the numerical manifold method
In the numerical manifold method, there are two kinds of covers, namely mathematical cover and physical cover. Mathematical covers are independent of the physical domain of the problem, over which weight funct...
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An updated continuum damage model to investigate fracture process of structures in DBTT region
In the Ductile–Brittle Transition Temperature (DBTT) region, it is not realistic to take unique fracture stress or fracture strain as the fracture criterion to investigate the fracture properties. In this pape...
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On the Moving Griffith Crack in a Nonhomogeneous Orthotropic Strip
A finite crack with constant length (Yoffe type crack) propagating in the functionally graded orthotropic strip under the plane loading is investigated by means of the Schmidt method. By using the Fourier tran...
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On The Use Of Vector J-Integral In Crack Growth Criteria For Brittle Solids
In this paper the criterion for crack-growth in solids is investigated on the basis of the concept of potential energy release rate. The expressions for path-independent vector integral Ji (i = 1,2) are derived f...
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Fracture analysis of a functionally graded coating-substrate structure with a crack perpendicular to the interface - Part II: Transient problem
In Part I of this paper, the static problem of a functionally graded coating-substrate system with an internal or edge crack perpendicular to the interface has been studied. In this part, the transient respons...
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Fracture analysis of a functionally graded coating-substrate structure with a crack perpendicular to the interface - Part I: Static problem
The static crack problem of a functionally graded coating-substrate structure with an internal or edge crack perpendicular to the interface is investigated under an in-plane load. The structure is made up of a...
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A note on the Gauss-Jacobi quadrature formulae for singular integral equations of the second kind
A fast and efficient numerical method based on the Gauss-Jacobi quadrature is described that is suitable for solving Fredholm singular integral equations of the second kind that are frequently encountered in f...
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Article
Crack propagating in a functionally graded strip under the plane loading
In the present paper, a finite crack with constant length (Yoffe type crack) propagating in the functionally graded strip under the plane loading is investigated by means of the Schmidt method. By using the Fo...
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Article
Effect of Friction on Edge Singularities in Slip Bands
Resistance to dislocation glide in slip bands due to the presence of other dislocations may be represented by an additional term in the integral equation formulation of the equilibrium state. As a consequence,...
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A Microscopic Mechanism of Fatigue Crack Growth Based on the Dislocation-Free Zone
A new microscopic mechanism model of fatigue crack growth is presented based on the dislocation-free-zone (DFZ) theory. A cohesive zone model is developed to determine the stress filed of the DFZ under cyclic ...
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Weight functions for interface cracks in dissimilar anisotropic piezoelectric materials
Weight functions proposed for interface cracks in dissimilar isotropic materials (Gao, 1991; Chen and Hasebe, 1994) are extended to treat those in piezoelectric materials. The difficulties in separating the ei...
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Article
Transient response of a surface crack subjected to dynamic anti-plane concentrated loadings
In this study, the transient response of a surface crack in an elastic solid subjected to dynamic anti-plane concentrated loadings is investigated. The angles of the surface crack and the half-plane are 60° an...
