Results 31 to 40 of about 5,341,331 (300)

Modelling of the Solidifying Microstructure of Inconel 718: Quasi-Binary Approximation

Modelling, 2023
The prediction of the equilibrium and metastable morphologies during the solidification of Ni-based superalloys on the mesoscopic scale can be performed using phase-field modeling.
Nikolai Kropotin, Yindong Fang, Chu Yu, Martin Seyring, Katharina Freiberg, Stephanie Lippmann, Tatu Pinomaa, Anssi Laukkanen, Nikolas Provatas, Peter K. Galenko   +9 more
doaj   +1 more source

Phase Field Modeling of Fracture and Stress Induced Phase Transitions [PDF]

, 2007
We present a continuum theory to describe elastically induced phase transitions between coherent solid phases. In the limit of vanishing elastic constants in one of the phases, the model can be used to describe fracture on the basis of the late stage of ...
A. A. Griffith, B. Nestler, C. Müller-Gugenberger, E. Brener, I. A. Privorotskii, L. B. Freund, M. A. Grinfeld, R. Spatschek   +7 more
core   +2 more sources

Phase field simulation of microstructure evolution and process optimization during homogenization of additively manufactured Inconel 718 alloy

Frontiers in Materials, 2022
An in-depth and integral understanding of the microstructural evolution during thermomechanical process (TMP) is of great significance to optimize the manufactural process for high-quality components via additive manufacturing.
Miaomiao Chen, Qiang Du, Renhai Shi, Huadong Fu, Huadong Fu, Huadong Fu, Zhuangzhuang Liu, Jianxin Xie, Jianxin Xie, Jianxin Xie   +9 more
doaj   +1 more source

A phase-field model for cohesive fracture [PDF]

, 2013
In this paper, a phase-field model for cohesive fracture is developed. After casting the cohesive zone approach in an energetic framework, which is suitable for incorporation in phase-field approaches, the phase-field approach to brittle fracture is ...
Auricchio, Belytschko, Borden, Borst, Borst, Borst, Borst, Bourdin, Bourdin, Bourdin, Camacho, Comi, Fleming, Francfort, Geers, Gravouil, Hofacker, Ingraffea, Miehe, Miehe, Moës, Moës, Mumford, Ngo, Peerlings, Pijaudier-Cabot, Rashid, Remmers, Wells, Xu   +29 more
core   +7 more sources

The frequency-dependent polarization switching in nanograined BaTiO3 films under high-strength electric field

International Journal of Smart and Nano Materials, 2023
The polarization reorientation in ferroelectric nanomaterials under high-strength AC electric fields is intrinsically a frequency-dependent process. However, the related study is not widely seen.
Ming-Ran Zhang, Yu Su
doaj   +1 more source

Phase-space Quantization of Field Theory [PDF]

, 1999
In this lecture, a limited introduction of gauge invariance in phase-space is provided, predicated on canonical transformations in quantum phase-space.
Curtright, Thomas, Zachos, Cosmas
core   +5 more sources

Phase Field Methods and Dislocationss

MRS Proceedings, 2000
We present a general formalism for incorporating dislocations in Phas Field methods. This formalism is based on the elastic equiva;ence betweem a dislocation loop and a platelet inclusion of specific stress-free strain related to the loop Burgers vector and normal.
Rodney, D., Finel, A.
openaire   +3 more sources

Sharp interface limits of phase-field models [PDF]

, 2000
The use of continuum phase-field models to describe the motion of well-defined interfaces is discussed for a class of phenomena, that includes order/disorder transitions, spinodal decomposition and Ostwald ripening, dendritic growth, and the ...
Ascher U. M., Caflisch R. E., Computational Fluid Dynamics, Freistühler, Hairer E., Jin S., Jin S., Lambert J. D., Le Tallec P., Liotta S. F., Liu T.-P., Lowrie R. B., Pareschi L., Tyson R., Vincenti W. G.   +14 more
core   +3 more sources

Phase Field Modeling of Fast Crack Propagation [PDF]

, 2005
We present a continuum theory which predicts the steady state propagation of cracks. The theory overcomes the usual problem of a finite time cusp singularity of the Grinfeld instability by the inclusion of elastodynamic effects which restore selection of
A. A. Griffith, Efim Brener, Heiner Müller-Krumbhaar, K. Kassner, Klaus Kassner, L. B. Freund, M. A. Grinfeld, Miks Hartmann, R. J. Asaro, Robert Spatschek   +9 more
core   +2 more sources

A Generalized Phase-Field System

Journal of Mathematical Analysis and Applications, 1999
The authors consider the problem \((\Omega\) bounded domain in \(\mathbb{R}^N\) with \(C^2\)-boundary) \[ \begin{aligned} {\partial u\over\partial t}+l {\partial \varphi\over\partial t}=\Delta u+f(x,t), \quad & (x,t)\in Q:=\Omega \times(0,T),\\ {\partial\varphi \over\partial t}=\Delta\varphi+ F(x,t,\varphi) +u,\quad & (x,t)\in Q,\\ {\partial u\over ...
Moroşanu, Costică, Motreanu, Dumitru
openaire   +1 more source