This paper describes a method for modeling the natural peeling phenomenon over any 3D surface. Using crack input data—precomputed with a semi-physical solution—this method allows simulating peeling on any type of triangulated 3D object. Our model’s main advantage is that it proposes an method that is intuitive enough to make it easy to understand and convenient to apply, user controllable, and ...

Abstract. In spite of the significant developments seen in recent years, numerical modeling of Hydraulic Fracturing still poses major challenges due to the strong coupling between fluid flow and crack development, which is itself a strongly non-linear problem. The objective of this paper is to show advances in a line of work started by Segura and Carol [1], on the modeling of coupled H-M discon...

Theories of toughness of materials depend on an understanding of the characteristic instabilities of the crack tip, and their possible interactions. In this paper we examine the effect of dislocation emission on subsequent cleavage of a crack and on further dislocation emission. The work is an extension of the previously published Lattice Greens Function methodology[1, 2, 3]. We have developed ...

In the short crack regime of the fatigue process, grain boundaries in steels are barriers against crack growth. In this paper, we use: (1) a method involving crack density; and (2) a method of dimensional analysis, to evaluate the effects of grain size and grain-boundary resistance on short crack behaviour and fatigue life. The results show that the fatigue life increases with a decrease in gra...

nowadays, textile and woven fabric composites are taken into consideration forapplications in high mechanical properties and every in-plane direction. however, developments inmodelling and characterisation of the fabric reinforced composite materials are considered more inthe effects of element types used in the mesh generation of the crack tip. the type of elementselected for the crack tip, a ...

A novel FFT-based phase-field fracture framework for modelling fatigue crack initiation and propagation at the microscale is presented. damage driving force defined based on stored energy dislocation density, relating with microstructural damage. The formulation numerically implemented using FFT methods to enable of sufficiently large, representative 3D regions. early stages cracking are simula...

Fatigue crack growth has been observed recently in ferroelectrics under cyclic electric loading[ Does the crack grow by electric breakdown\ or by the stress _eld near the crack tip< The present paper provides a mechanistic explanation for the electric!_eld!induced fatigue crack growth[ The non!uniform electric _eld near an insulated crack tip might cause domain switching which in turn produces ...

Binder jet three-dimensional (3D) printing has been extensively developed since the early 1990s and is widely applied in various industrial fields. jetting 3D-printed products have anisotropic mechanical properties; however, no study provided a systematic explanation of this mechanism. Herein, we propose that crystal lattice model based on crystallographic logic can explain anisotropy fracture ...

We present a combined novel methodology to study the three-dimensional complex geometry of a tortuous crack and identify the essential features of the crack and its propagation inside a heterogeneous material. We find that some severe damage events occur unexpectedly below a local mode-I crack within the sample; we realize that the severe plastic zone of the local mode-I crack is shifted down b...