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首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >Porous scaffold design by solid T-splines and triply periodic minimal surfaces
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Porous scaffold design by solid T-splines and triply periodic minimal surfaces

机译：坚固的T样条和三重周期性周期性最小表面设计的多孔支架

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摘要

Due to its high interconnectivity and smooth surface, the triply periodic minimal surface (TPMS) has become a promising porous structure applied as tissue engineering scaffold, lightweight filling and micro-reactor. Yet, it is still a tough challenge to meet the authentic flexible demands by current TPMS design methods. In this work, a complete TPMS porous scaffold design method based on solid T-splines is proposed. In order to give full play to advantages of TPMS, the parameter influences on the volume specific surface area and porosity are analyzed, respectively. Then, a novel solid T-spline based heterogeneous porous scaffold design solution is offered, including TPMS scaffolds with non-uniform threshold, period and unit. Initially, a complex solid T-spline model can be approximately represented by sampled hexahedron elements. Eventually, these sampled hexahedron elements are redivided into tetrahedrons for TPMS extraction by the Marching tetrahedra algorithm. The information for designing TPMS, including the external volume, internal unit parameters can be represented via solid T-splines. The TPMS can be directly extracted from the solid T-spline designed volume which is homeomorphic to a cube. The final TPMS scaffold is saved as STL model and manufactured via additive manufacturing technology. Experimental results support the effectiveness as well as the flexibility of this solid T-spline based TPMS scaffold design method. (C) 2018 Elsevier B.V. All rights reserved.
机译：由于其高互连性和光滑表面，三重周期性最小表面（TPMS）已成为有希望的多孔结构，可用作组织工程支架，轻质填充物和微反应器。然而，通过当前的TPMS设计方法满足真实的灵活性需求仍然是一个艰巨的挑战。在这项工作中，提出了一种完整的基于实心T样条的TPMS多孔支架设计方法。为了充分发挥TPMS的优势，分别分析了参数对体积比表面积和孔隙率的影响。然后，提出了一种新颖的基于固体T样条的异质多孔支架设计解决方案，包括阈值，周期和单位不一致的TPMS支架。最初，复杂的实心T样条曲线模型可以用采样的六面体元素近似表示。最终，通过Marching四面体算法将这些采样的六面体元素重新划分为四面体，以进行TPMS提取。 TPMS设计信息，包括外部体积，内部单元参数，可以通过实心T样条曲线表示。 TPMS可以直接从实心T样条设计体积中提取，该体积是同胚的。最终的TPMS支架被保存为STL模型，并通过增材制造技术进行制造。实验结果证明了这种基于固体T样条的TPMS支架设计方法的有效性和灵活性。 （C）2018 Elsevier B.V.保留所有权利。

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  • 来源
  • 作者

    Feng Jiawei; Fu Jianzhong; Shang Ce; Lin Zhiwei; Li Bin;

  • 作者单位

    Zhejiang Univ, Coll Mech Engn, State Key Lab Fluid Power & Mechatron Syst, Hangzhou 310027, Zhejiang, Peoples R China;

    Zhejiang Univ, Coll Mech Engn, State Key Lab Fluid Power & Mechatron Syst, Hangzhou 310027, Zhejiang, Peoples R China;

    Zhejiang Univ, Coll Mech Engn, Key Lab Printing Proc & Equipment Zhejiang Prov 3, Hangzhou 310027, Zhejiang, Peoples R China;

    Zhejiang Univ, Coll Mech Engn, Key Lab Printing Proc & Equipment Zhejiang Prov 3, Hangzhou 310027, Zhejiang, Peoples R China;

    Zhejiang Univ, Coll Mech Engn, Key Lab Printing Proc & Equipment Zhejiang Prov 3, Hangzhou 310027, Zhejiang, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Solid T-splines; Porous scaffold; Triply periodic minimal surfaces; Additive manufacturing;

    机译：T型样条;多孔支架;周期性周期性最小表面;增材制造;

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