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Analysis method for forecasting periodic lattice-material yield surface

An analysis method and periodic technology, applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve the effects of improving modeling efficiency, shortening data processing time, and achieving greater accuracy and convenience

Inactive Publication Date: 2017-11-21
BEIHANG UNIV
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, in order to more accurately and conveniently predict the yield surface of periodic lattice materials under complex stress states, establish a method for efficiently predicting the yield surface of periodic lattice materials Analytical methods to improve computing efficiency and reduce the consumption of human and financial resources

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0038] Such as Figure 6 As shown, the present invention predicts the analysis method of periodic lattice material yield surface, comprises the following steps:

[0039] (1) According to the structural characteristics and size characteristics of the actual lattice material, select an appropriate mesomechanics model to describe, in order to figure 1 The lattice material shown is taken as an example, which can be regarded as a lattice material composed of three-dimensional truss structures, and the trusses can be described by beams in the mechanical model.

[0040] (2) According to the periodic arrangement of the mesomechanics model, select figure 2 Shown is a representative voxel (RVE) that can reproduce the actual structure through a simple array arrangement.

[0041] (3) According to the corresponding RVE, considering the coupling effect of ...

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Abstract

The invention relates to an analysis method for forecasting a periodic lattice-material yield surface. According to the analysis method, the coupling effect of the internal-structure axial force and bending moment when a material is actually stressed is considered, a yield condition of periodic lattice-material representative volume element (RVE) is obtained through theoretical derivation, and then through finite element analysis software, mass total calculation is achieved through programming. In post-processing, the calculating result is obtained in the mode that a yield point is automatically identified and extracted, the calculating result and the theoretical result are jointly visualized, and are compared mutually and verified, the accuracy of the result is guaranteed, and therefore forecasting of the strength performance of the periodic lattice material is achieved.

Description

technical field [0001] The invention relates to a method for analyzing the yield surface of a periodic lattice material, belonging to the field of material mechanical performance analysis. Background technique [0002] With the advancement of aerospace vehicle structure design concepts and processing technology, light metal foam materials and honeycomb laminates have been used in aerospace structures, and lattice materials with micro-truss structures are considered to be the most promising new generation of advanced materials in recent years. Lightweight material. In addition to its light weight and high strength properties, lattice materials also have strong designability to meet the characteristics of heat dissipation, energy absorption, and wave absorption. This combination of versatility and designability has enabled lattice materials to be widely used in the aerospace field. [0003] Therefore, as a material widely used in aerospace structures, the analysis of its mec...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/23G06F2119/06
Inventor 杨振宇张鸣扬李响卢子兴
Owner BEIHANG UNIV
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