Methods and Systems For Numerically Simulating Bi-Phase Material That Changes Phase After Crossing A Directional Spatial Boundary

摘要

Numerical simulation of bi-phase material that changes phase after crossing a directional spatial boundary is disclosed. FEA model contains finite elements for representing bi-phase material. Each finite element is associated with a material identifier containing first and second sets of material properties for respective first and second phases of the bi-phase material. All finite elements are initially assigned with the first set of material properties. At each solution cycle during a time-marching simulation of the bi-phase material, the second set of material properties under the same material identifier is assigned to those of the finite elements determined to have moved across the direction spatial boundary for instant phase change. Material properties of a finite element located in the transition region are calculated by interpolating first and second set of material properties for gradual phase transition. Numerically-simulated structural behaviors are calculated with finite elements grouped together under the same material identifier.

主权项

1. A method of numerically simulating bi-phase material that changes phase after crossing a directional spatial boundary comprising:
receiving, in a computer system having at least one application module installed thereon, a definition of a directional spatial boundary of a bi-phase material and a finite element analysis (FEA) model containing a plurality of finite elements for representing the bi-phase material, each of the finite elements being associated with a material identifier that contains first and second sets of material properties corresponding to respective first and second phases of the bi-phase material, the bi-phase material changes from the first phase to the second phase after crossing the directional spatial boundary; determining, by said at least one application module, a material flow direction and a type of the directional spatial boundary from said received definition, the type is either an instant phase change type or a gradual phase transition type; initially assigning, by said at least one application module, the first set of material properties to all of the finite elements; and conducting, by said at least one application module, a time-marching simulation to obtain numerically-simulated structural behaviors of the bi-phase material moving in the material flow direction using the FEA model, at each of a plurality of solution cycles during the time-marching simulation, assigning the second set of material properties under the same material identifier to those of the finite elements determined to have moved across the direction spatial boundary for the instant phase change type, calculating a new set of material properties by interpolating the first and the second sets of the material properties for those of the finite elements determined to be located with the directional spatial boundary for the gradual phase transition type, calculating and calculating the numerically-simulated structural behaviors with the finite elements that are grouped together in accordance with the same material identifier.