Dynamic crack propagation with a variational phase-field model: limiting speed, crack branching and velocity-toughening mechanisms
نویسندگان
چکیده
منابع مشابه
Dynamic crack propagation with a variational phase-field model: limiting speed, crack branching and velocity-toughening mechanisms
We address the simulation of dynamic crack propagation in brittle materials using a regularized phasefield description, which can also be interpreted as a damage-gradient model. Benefiting from a variational framework, the dynamic evolution of the mechanical fields are obtained as a succession of energy minimizations. We investigate the capacity of such a simple model to reproduce specific expe...
متن کاملStudy of the branching instability using a phase field model of inplane crack propagation
In this study, the phase field model of crack propagation is used to study the dynamic branching instability in the case of inplane loading in two dimensions. Simulation results are in good agreement with theoretical predictions and experimental findings. Namely, the critical speed at which the instability starts is about 0.48cs. They also show that a full 3D approach is needed to fully underst...
متن کاملPhase-field modeling of crack propagation in piezoelectric and ferroelectric materials with different electromechanical crack conditions
We present a family of phase field models for fracture in piezoelectric and ferroelectric materials. These models couple a variational formulation of brittle fracture with, respectively, (1) the linear theory of piezoelectricity, and (2) a Ginzburg Landau model of the ferroelectric microstructure to address the full complexity of the fracture phenomenon in these materials. In these models, both...
متن کاملVelocity mode transition of dynamic crack propagation in hyperviscoelastic materials: A continuum model study
Experiments of crack propagation in rubbers have shown that a discontinuous jump of crack propagation velocity can occur as energy release rate increases, which is known as the "mode transition" phenomenon. Although it is believed that the mode transition is strongly related to the mechanical properties, the nature of the mode transition had not been revealed. In this study, dynamic crack propa...
متن کاملPoint-based Dynamic Deformation and Crack Propagation
In this paper, we articulate a novel meshless computational paradigm for the effective modeling, accurate physical simulation, and rapid visualization of solid objects. The uniqueness of our approach is that both the interior and the boundary of our new volumetric representation are point-based, generalizing the powerful and popular method of point-sampled surfaces. We also build the point-base...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Journal of Fracture
سال: 2016
ISSN: 0376-9429,1573-2673
DOI: 10.1007/s10704-016-0163-1