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Abstract：
Three-dimensionally printed parts are increasingly used in industry for quick repairs. They are often operated in the presence of grease, oil, and others. This article describes the effect of engine mineral oil on the fatigue life of 3D-printed FDM plastic samples. For this reason, this article aimed to investigate the influence of oil on the fatigue life of materials made using this technology. Samples made of ABA, ASA, PLA, and HIPS materials were printed with 100% fill. Divided into groups, they were stored for 15, 30, and 60 days in an oil bath at a room temperature of 23 °C and an increased temperature of 70 °C. To compare the effect of storage in oil, static tests were performed to determine the tensile strength of the specimens and to determine the load levels for the cyclic tests. Cyclic tests were performed to determine the effect of oil and temperature on the fatigue life. Internal structure studies of the specimens were performed using computed microtomography to determine the changes in the porosity of the specimens under the influence of oil. In the case of ABS, the oil-bathed samples showed a clear increase in the fatigue life, especially at 23 °C. For the ASA specimens, an increase was also evident, especially for the lower stress value. For HIPS and PLA, no clear effect of the oil bath on the fatigue life value of the samples was determined. Porosity studies using computed microtomography showed a clear decrease in the porosity of the samples as a result of the oil bath for all of them.
摘要：
三维打印部件越来越多地用于工业中的快速维修。它们通常在有油脂的情况下操作，油,和其他人。本文介绍了发动机矿物油对3D打印FDM塑料样品疲劳寿命的影响。出于这个原因,本文旨在研究油对使用该技术制成的材料的疲劳寿命的影响。ABA制成的样品，ASA,PLA,和HIPS材料以100%填充印刷。分成几组,将它们在23°C的室温和70°C的升高温度下在油浴中储存15、30和60天。为了比较在油中储存的效果，进行了静态试验，以确定试样的抗拉强度，并确定循环试验的载荷水平。进行循环试验以确定油和温度对疲劳寿命的影响。使用计算机断层扫描对标本进行内部结构研究，以确定在油的影响下标本孔隙率的变化。在ABS的情况下，油浴样品显示疲劳寿命明显增加，尤其是在23°C对于ASA标本，增长也很明显，特别是对于较低的应力值。对于HIPS和PLA，确定油浴对样品的疲劳寿命值没有明显影响。使用计算机显微断层扫描的孔隙率研究表明，由于所有样品的油浴，样品的孔隙率均明显降低。
