Estimations of the effective Young's modulus of specimens prepared by fused filament fabrication
Estimations of the effective Young's modulus of specimens prepared by fused filament fabrication
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DOI：
10.1016/j.addma.2021.101983
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发表时间：
2021-06-01
影响因子：
11
通讯作者：
Kang, Sung Hoon
中科院分区：
文献类型：
--
作者：
Fang, Lichen;Yan, Yishu;Kang, Sung Hoon
均匀各向同性材料的弹性响应通常由其杨氏模数(E)表示，但与添加剂制造相关的几何变异性导致材料既不是均匀的也不是各向同性的。在这里，我们研究了用熔丝制造的样品的有效弹性模数(E-Ef)的估算方法。我们根据材料特性和CT扫描的几何形状对打印样品进行了有限元分析。分析揭示了试件的层结构如何改变了内部应力分布和由此产生的E-Eff。我们还研究了不同的经验方法来估计E-Eff作为指导。我们预计，我们的研究结果可以为印刷样品的模数估计提供指导，并有可能应用于其他基于挤出的添加剂制造技术。
The elastic response of homogeneous isotropic materials is most commonly represented by their Young's modulus (E), but geometric variability associated with additive manufacturing results in materials that are neither homogeneous nor isotropic. Here we investigated methods to estimate the effective elastic modulus (E-eff) of samples fabricated by fused filament fabrication. We conducted finite element analysis (FEA) on printed samples based on material properties and CT-scanned geometries. The analysis revealed how the layer structure of a specimen altered the internal stress distribution and the resulting E-eff. We also investigated different empirical methods to estimate E-eff as guides. We envision the findings from our study can provide guidelines for modulus estimation of as-printed specimens, with the potential of applying to other extrusion-based additive manufacturing technologies.