Predicting the behavior and mechanical properties of 3D-printed parts is crucial for 3D printer users. This study conducted experimental investigations on Onyx 3D-printed parts to identify the most important printing parameters. These parameters were specimen positioning and the number of specimen walls. The experimental results indicated that specimens oriented in the XZ direction were 48% stiffer than those oriented in the XY direction and 54% stiffer than those oriented in the ZX direction. Additionally, the results demonstrated that walls significantly influenced the mechanical properties of specimens in the XY and XZ orientations but had no effect on those in the ZX orientation. The Young's modulus increased by 60% between a specimen with one wall and another with eight walls. This paper presents an analytical model for predicting mechanical properties based on the number of walls, with a prediction error ranging from 1% to 15%. Additionally, a numerical simulation approach was proposed to predict the mechanical behavior of parts. The numerical and experimental results comparison showed a 1% to 9% prediction error and a good correlation between numerical and experimental curves. These findings can be a valuable aid to engineers in the design of 3D printed mechanical concepts.

中文翻译：

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各向异性和壁厚对 3D 打印缟玛瑙零件机械性能的影响

预测 3D 打印零件的行为和机械性能对于 3D 打印机用户至关重要。本研究对 Onyx 3D 打印部件进行了实验研究，以确定最重要的打印参数。这些参数是样本定位和样本壁的数量。实验结果表明，XZ 方向的试件比 XY 方向的试件刚度高 48%，比 ZX 方向的试件刚度高 54%。此外，结果表明，壁显着影响 XY 和 XZ 方向样本的机械性能，但对 ZX 方向的样本没有影响。具有一壁的样品与具有八壁的样品之间的杨氏模量增加了 60%。本文提出了一种基于壁数预测力学性能的分析模型，预测误差范围为 1% 至 15%。此外，还提出了一种数值模拟方法来预测零件的机械行为。数值与实验结果比较表明，预测误差为1%~9%，数值曲线与实验曲线具有良好的相关性。这些发现可以为工程师设计 3D 打印机械概念提供宝贵的帮助。