Failure Analysis and Mechanical Characterization of 3D Printed ABS With Respect to Layer Thickness and Orientation
Failure Analysis and Mechanical Characterization of 3D Printed ABS With Respect to Layer Thickness and Orientation
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DOI：
10.1007/s11668-016-0113-2
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发表时间：
2016-06-01
影响因子：
1.2
通讯作者：
Letcher, Todd
中科院分区：
文献类型：
--
作者：
Rankouhi, Behzad;Javadpour, Sina;Letcher, Todd
与传统的减法制造方法不同，传统的减法制造方法需要去除材料以达到所需的形状，而加法制造是通过一次添加一层材料，直接从计算机辅助设计模型制造对象的技术。在这项研究中，通过研究采用熔融沉积建模的丙烯腈-丁二烯-苯乙烯(ABS)制造的零件的机械性能与层厚度和取向之间的相关性，来综合地将3D打印对象的强度表示为层厚度的函数。此外，对一个典型的支撑架进行了案例研究，以推广在拉伸试件上所做的大量实验工作的结果。最后，用扫描数字显微镜对拉伸试件进行了断口分析，以确定层厚对破坏模式的影响。统计分析表明，涂层厚度和光栅取向对材料的力学性能有显著影响。拉伸测试结果表明，与0.4 mm层厚相比，0.2 mm层厚的印刷样品具有更高的弹性模量和极限强度。这些结果对3D打印和功能承重部件的决策和未来的使用具有直接的影响。
In contrast to conventional subtractive manufacturing methods which involve removing material to reach the desired shape, additive manufacturing is the technology of making objects directly from a computer-aided design model by adding a layer of material at a time. In this study, a comprehensive effort was undertaken to represent the strength of a 3D printed object as a function of layer thickness by investigating the correlation between the mechanical properties of parts manufactured out of acrylonitrile butadiene styrene (ABS) using fused deposition modeling and layer thickness and orientation. Furthermore, a case study on a typical support frame is done to generalize the findings of the extensive experimental work done on tensile samples. Finally, fractography was performed on tensile samples via a scanning digital microscope to determine the effects of layer thickness on failure modes. Statistical analyses proved that layer thickness and raster orientation have significant effect on the mechanical properties. Tensile test results showed that samples printed with 0.2 mm layer thickness exhibit higher elastic modulus and ultimate strength compared with 0.4 mm layer thickness. These results have direct influence on decision making and future use of 3D printing and functional load bearing parts.