Numerical simulation method for generating three-dimensional damaged pattern

A technology of numerical simulation and damage pattern, applied in the field of numerical simulation, to achieve the effect of intuitive and real mechanical properties
CN105046737AActive Publication Date: 2015-11-11BEIJING JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
BEIJING JIAOTONG UNIV
Publication Date
2015-11-11

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Abstract

The invention provides a numerical simulation method for generating a three-dimensional damaged pattern. The method comprises the steps of establishing a three-dimensional geometric model for an object described in a three-dimensional damaged pattern, dissecting mesoscopic grids, setting a boundary condition, an initial condition and material parameters for the numerical simulation, selecting a yield surface with angular points, considering a strength-softening constitutive relationship and a non-associated flow rule, conducting the numerical simulation on the geometric model based on the finite-element dynamic relaxation method to get a solution, and outputting a three-dimensional damaged pattern. In this way, the three-dimensional damaged pattern can be generated directly based on a mechanical equation without the need of pre-assuming any physical mechanism. The above method provided in the invention is used for directly generating three-dimensional damaged patterns. Three-dimensional damaged patterns, generated based on the above method, can better reflect the actual damage situations of materials. Therefore, the mechanical performances of materials can be reflected more intuitively and more truly.
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Description

Technical field

[0001] The invention belongs to the technical field of material numerical simulation, and specifically relates to a numerical simulation method for generating a three-dimensional damage pattern. Background technique

[0002] For materials, especially for load-bearing solid materials, loading damage or fatigue damage is an important factor in determining material life. A pattern is a non-uniform macroscopic structure diagram with a certain regularity in space or time. It is also a non-linear macroscopic diagram for understanding and simulating the occurrence, development, and end of material damage. The study of the growth process of material damage patterns has a particularly important fundamental significance for understanding the mechanism of the gestation and occurrence of major engineering kinetic catastrophes.

[0003] When the material is loaded, the solid material is damaged. The initial loading, the damage pattern describing the material damage is roughly u...

Claims

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