Additive Manufacturing of Syntactic Foams: Part 2: Specimen Printing and Mechanical Property Characterization
Additive Manufacturing of Syntactic Foams: Part 2: Specimen Printing and Mechanical Property Characterization
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复合泡沫塑料的增材制造：第 2 部分：样本打印和机械性能表征
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
N. Gupta
中科院分区：
文献类型：
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作者：
A. Singh;Brooks Saltonstall;Balu Patil;N. Hoffmann;M. Doddamani;N. Gupta
摘要高密度聚乙烯（HDPE）及其粉煤灰空心球填充复合泡沫长丝是近年来发展起来的新材料。这些细丝用于使用商用打印机进行三维（3D）打印。开发的合成泡沫长丝（HDPE40）在HDPE基体中含有40 wt.%的微球。优化了HDPE和HDPE40的打印参数，以便在广泛使用的商用打印机中使用，并以10−3 s−1的应变速率对样品进行三维（3D）打印以进行拉伸测试。工艺优化使3D打印机运行平稳，在打印过程中没有喷嘴堵塞或空心球破裂。表征结果表明，3d打印的HDPE和HDPE40试样的拉伸模量值高于注射成型试样，抗拉强度相当，但断裂应变和密度较低。
AbstractHigh-density polyethylene (HDPE) and its fly ash cenosphere-filled syntactic foam filaments have been recently developed. These filaments are used for three-dimensional (3D) printing using a commercial printer. The developed syntactic foam filament (HDPE40) contains 40 wt.% cenospheres in the HDPE matrix. Printing parameters for HDPE and HDPE40 were optimized for use in widely available commercial printers, and specimens were three-dimensionally (3D) printed for tensile testing at strain rate of 10−3 s−1. Process optimization resulted in smooth operation of the 3D printer without nozzle clogging or cenosphere fracture during the printing process. Characterization results revealed that the tensile modulus values of 3D-printed HDPE and HDPE40 specimens were higher than those of injection-molded specimens, while the tensile strength was comparable, but the fracture strain and density were lower.