Polylactic acid (PLA) reinforced with biphasic calcium phosphate mixtures were extruded as filaments and subsequently 3D printed into definite shapes in accordance with the ASTM standards. The optimum combination of PLA and BCP to attain a stable 3D printed component has been respectively determined as 80 and 20 wt %. BCP inclusions in the range of 2.5 and 5 wt % in PLA led to a respective upsurge ∼11 % in tensile strength and ∼15 % upsurge in compressive strength than pure PLA. While excess BCP additions led to a decline in the material strength. Further, representative volume element models were developed using the properties of BCP and PLA to build ASTM models for performing Finite element analysis (FEA) under both static and dynamic loading conditions. FEA results specified good uniformity with the experimental mechanical data. tests ensured the biocompatibility of 3D printed PLA-BCP composites.

中文翻译：

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3D 打印聚丙交酯/双相磷酸钙复合材料共混物的制造、机械、有限元和体外评估

用双相磷酸钙混合物增强的聚乳酸 (PLA) 被挤出为长丝，随后根据 ASTM 标准 3D 打印成确定的形状。获得稳定的 3D 打印组件的 PLA 和 BCP 的最佳组合分别确定为 80 和 20 wt%。 PLA 中 BCP 含量为 2.5 wt% 和 5 wt% 的 BCP 夹杂物导致拉伸强度比纯 PLA 分别提高约 11% 和压缩强度约 15%。而过量的BCP添加导致材料强度下降。此外，利用 BCP 和 PLA 的特性开发了代表性体积元模型，以构建 ASTM 模型，以便在静态和动态负载条件下执行有限元分析 (FEA)。 FEA 结果表明与实验机械数据具有良好的一致性。测试确保了 3D 打印的 PLA-BCP 复合材料的生物相容性。