多孔结构对Vero White型光敏树脂力学性能的影响
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摘要
多孔结构设计是影响使用性能的主要因素之一,优化多孔结构是减少质量的重要途径.利用静力学仿真分析不同板材内部结构力学性能的变化规律及特点.采用以色列Objet Eden250光固化设备,对Vero White型光敏树脂进行不同结构光固化成型,利用AG-Xplus电子万能试验机测试了试样抗压性能,并与仿真结果对比.研究结果表明,多孔结构的抗压强度随着孔隙率的升高而降低,不同结构的多孔结构的抗压强度的变化范围在15～70 MPa.蜂窝状结构的性能优于六面体结构,六面体结构优于八面体结构.研究结果与理论结果基本一致,为多孔结构在增材制造的成功应用提供了理论依据和实验依据.
The design of porous structure is one of the main factors that affect performance. It is an important way to reduce the material mass by optimizing porous structure. Static mechanics simulation is used to analyze the change rules of different plate inner structures. Israel Objet Eden250 stereo lithography apparatus is used to solidify different structures of Vero White photosensitive resin,AG-Xplus electronic universal testing machine is used to test the compressive properties of samples,and the simulation results are compared as well. The results show that the compressive strength of porous structure reduces with the increase of porosity,and the value of different structures is in the range of 15 ～ 70 MPa. The honeycomb structure has a better performance than the hexahedron structure,and the hexahedron structure has a better than the octahedron structure. The results are basically consistent with the theoretical results,which provide a theoretical and experimental basis for the successful application of porous structure in the additive manufacturing.
The design of porous structure is one of the main factors that affect performance. It is an important way to reduce the material mass by optimizing porous structure. Static mechanics simulation is used to analyze the change rules of different plate inner structures. Israel Objet Eden250 stereo lithography apparatus is used to solidify different structures of Vero White photosensitive resin,AG-Xplus electronic universal testing machine is used to test the compressive properties of samples,and the simulation results are compared as well. The results show that the compressive strength of porous structure reduces with the increase of porosity,and the value of different structures is in the range of 15 ～ 70 MPa. The honeycomb structure has a better performance than the hexahedron structure,and the hexahedron structure has a better than the octahedron structure. The results are basically consistent with the theoretical results,which provide a theoretical and experimental basis for the successful application of porous structure in the additive manufacturing.
引文
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[6] Tam K M M,Mueller C T. Additive manufacturing along principal stress lines[J]. 3D Printing and Additive Manufacturing, 2017,4(2):63-81.
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[8] Habib F N,Nikzad M,Masood S H,et al. Design and development of scaffolds for tissue engineering using threedimensional printing for bio-based applications[J]. 3D Printing and Additive Manufacturing,2016,3(2):119-127.
[9] Albrecht L D,Sawyer S W,Soman P. Developing 3D scaffolds in the field of tissue engineering to treat complex bone defects[J]. 3D Printing and Additive Manufacturing,2016,3(2):106-112.
[10] D'Amico A A,Debaie A,Peterson A M. Effect of layer thickness on irreversible thermal expansion and interlayer strength in fused deposition modeling[J]. Rapid Prototyping Journal,2017,23(5):943-953.
[11]王超,张征宇,殷国富,等.一种基于光固化快速成型的飞机静弹性风洞试验模型设计方法[J].航空学报,2014,35(5):1193-1199.(Wang Chao,Zhang Zheng-yu,Yin Guo-fu,et al. A design method of the static aeroelastic aircraft model based on stereolithgraphy for wind tunnel test[J]. Acta Aeronautica et Astronautica Sinica, 2014, 35(5):1193-1199.)