Reliability prediction method for macroscopic elastic performance of porous frame structure manufactured by 3D printing technology

A porous frame and 3D printing technology, applied in the field of level certification, can solve the problems of reliability increase, huge time and economic cost, etc., and achieve the effect of improving work efficiency, simple and feasible method, and avoiding the process of trial production and testing

Pending Publication Date: 2018-05-15
BEIJING UNIV OF TECH
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Problems solved by technology

Such a reliability assessment method trades huge time and economic costs for reliability growth

Method used

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  • Reliability prediction method for macroscopic elastic performance of porous frame structure manufactured by 3D printing technology
  • Reliability prediction method for macroscopic elastic performance of porous frame structure manufactured by 3D printing technology
  • Reliability prediction method for macroscopic elastic performance of porous frame structure manufactured by 3D printing technology

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Embodiment Construction

[0039] according to figure 1 The flow of the forecasting method is shown, and the specific implementation process will be further described in detail below.

[0040] The first step, according to the actual application requirements, such as figure 2 Shown is the simplified design model. It is planned to use laser selective sintering technology to print this metal microstructure.

[0041] In the second step, for the design in the first step, according to the principle of establishing defect evaluation and quality certification, select three different printing service companies, use the same martensitic steel powder, have the same average particle size, and meet the particle size distribution Dispersion requirements. There are two communication printing directions, one is the horizontal direction (0°), and the other is the printing strategy at 45° to the horizontal direction (45°).

[0042]The third step is to observe and classify the 6 printed samples, and use the X-ray CT ...

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Abstract

The invention discloses a reliability prediction method for macroscopic elastic performance of a porous frame structure manufactured by a 3D printing technology. The method comprises the steps of (1)designing a cubic porous frame structure; (2) customizing a sample; (3) hierarchically scanning and observing defects of a microscopic structure by using a CT scanner; (4) quantitatively representingrepresentative sizes of the defects of the microscopic structure; (5) looking for a statistical distribution law of the representative sizes of the defects; (6) looking for relationships between feature sizes of the defects and a printing direction and between the feature sizes of the defects and a support type; (7) building a random numerical simulation model, and performing macroscopic elastic performance and microscopic stress numerical analysis; and (8) performing a macroscopic compression experiment, and performing check and correction on a reliability analysis result. The method is suitable for micro-defect evaluation and quality grade authentication of a 3D metal printing structure; the reliability prediction method combining the numerical simulation and experiment is provided for utilization of an existing 3D printing technology; the reliability verification cycle of metal 3D printing is shortened; the working efficiency is improved; and the production time is saved.

Description

technical field [0001] The invention relates to a method for predicting the reliability of macroscopic elastic properties of a porous frame structure manufactured by 3D printing technology, which is suitable for micro-defect evaluation and quality level certification of 3D metal printing structures. Background technique [0002] 3D printing technology does not require traditional fixtures, molds, tools, etc., and can directly manufacture sample prototypes. It has many advantages such as short production cycle, high material utilization rate, and the ability to process complex parts. It has received great attention since its inception in the last century. developed rapidly. It has an important impact on the fields of industrial manufacturing, aerospace, composite materials and biomedicine. The American "Time" magazine listed it as one of the "Top Ten Fastest-Growing Industries in the United States", and the British "Economist" magazine believed that it will "promote the real...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 文聘叶红玲刘东来杨庆生
Owner BEIJING UNIV OF TECH
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