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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

Active Publication Date: 2015-11-11
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, the commonly used description method of the damage pattern is to use the reaction-diffusion equation, but this method needs to assume various physical mechanisms first, and is an indirect method, and the generated damage pattern is different from the actual damage situation. gap
There is currently no direct method for generating 3D damage patterns of materials

Method used

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  • Numerical simulation method for generating three-dimensional damaged pattern
  • Numerical simulation method for generating three-dimensional damaged pattern
  • Numerical simulation method for generating three-dimensional damaged pattern

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Embodiment Construction

[0025] Those skilled in the art can understand that, unless specifically stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or intervening elements may also be present. In addition, "connected" or "coupled" as used herein may include wireless connection or coupling. The term "and / or" as used herein includes any unit and all combinations of one or more of the associated listed items.

[0026]...

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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.

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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Application Information

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IPC IPC(8): G06T17/00
Inventor 陈铁林刘晶晶台启民张中辉张良以程少振孔祥飞王杨
Owner BEIJING JIAOTONG UNIV
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