本文選題：多材料多尺度D打印 + 主動混合噴頭　； 參考：《中國科學(xué):技術(shù)科學(xué)》2017年02期

【摘要】：多材料多尺度3D打印代表增材制造技術(shù)的前沿和未來發(fā)展方向,在功能驅(qū)動的"材料-結(jié)構(gòu)-器件"的一體化制造,"創(chuàng)材"、"創(chuàng)物"和"創(chuàng)生"方面已經(jīng)展示出巨大的潛能和廣闊的應(yīng)用前景.本文提出一種單噴頭多材料多尺度3D打印新方法,針對核心功能部件——多材料主動混合噴頭,開展了理論分析、數(shù)值模擬和實驗驗證的系統(tǒng)研究.提出一種多材料主動混合噴頭,根據(jù)描述混合過程的物理方程(流體控制方程、湍流模型和稀物質(zhì)擴(kuò)散方程),闡述了葉輪直徑、葉輪轉(zhuǎn)速、流體黏度、體積力等因素對于混合效率和混合性能的影響及其規(guī)律;利用COMOSOL工程模擬軟件,進(jìn)一步揭示了葉輪直徑、葉輪轉(zhuǎn)速、流體黏度對于多材料混合的影響及其規(guī)律;最后,通過漸變色模型打印、變剛度模型打印和微尺度模型打印三個典型實驗案例,驗證了理論分析和數(shù)值模擬研究結(jié)果正確性和有效性.本研究為多材料多尺度3D打印奠定了理論基礎(chǔ),并為多材料多尺度3D打印裝備的開發(fā)和工藝優(yōu)化提供了重要理論支撐和方向性指導(dǎo).
[Abstract]:Multi-material and multi-scale 3D printing represents the frontier and future development direction of material augmentation manufacturing technology. It has shown great potential and broad application prospect in the integrated manufacture of functionally driven "material-structure-device", "creative material", "innovation" and "creation". In this paper, a new method of multi-scale 3D printing with single nozzle, multi-material and multi-scale is proposed. The theoretical analysis, numerical simulation and experimental verification are carried out for the multi-material active mixing nozzle, which is the core functional component. A multi-material active mixing nozzle is proposed. According to the physical equations (fluid governing equation, turbulence model and dilute material diffusion equation) describing the mixing process, the impeller diameter, impeller speed and fluid viscosity are described. The influence of volume force and other factors on mixing efficiency and mixing performance, and the influence of impeller diameter, impeller speed and fluid viscosity on the mixing of multi-materials are further revealed by using COMOSOL engineering simulation software. Finally, The correctness and validity of the theoretical analysis and numerical simulation results are verified by three typical experimental cases: gradual color model printing, variable stiffness model printing and micro scale model printing. This study lays a theoretical foundation for multi-material and multi-scale 3D printing, and provides important theoretical support and directional guidance for the development of multi-material and multi-scale 3D printing equipment and process optimization.
【作者單位】： 青島理工大學(xué)青島市3D打印工程研究中心;西安交通大學(xué)機(jī)械制造系統(tǒng)工程國家重點實驗室;
【基金】：國家自然科學(xué)基金“納米制造的基礎(chǔ)研究”重大研究計劃(批準(zhǔn)號:91023023);國家自然科學(xué)基金(批準(zhǔn)號:51375250) 青島市創(chuàng)業(yè)創(chuàng)新領(lǐng)軍人才計劃(編號:13-CX-18)資助項目
【分類號】：TP391.73

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