{"title":"Printing Setup and Sample Size Influence on the Mechanical Performance of Polylactic Acid Obtained by Material Extrusion","authors":"P. Rull, E. Perez","doi":"10.1007/s11665-024-10007-6","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Material extrusion additive manufacturing was introduced in many industries due to some relevant features such as the capability to process complex geometries and internal microstructures, application of material combinations, low volume production, faster product development cycle and waste reduction. However, this technique also exhibits some drawbacks like highly restricted printable materials and a generally low mechanical performance. The wide variety of processing parameters combined with the influence of complex lattice structure, quality bonding and heating–cooling periods along the building cycle indicates that an extensive mechanical characterization should be performed to warrant the in-service success of 3D printed parts. This study aims to investigate the effect of material extrusion setup, raster pattern and specimen size on the tensile, flexural and fracture behavior. The experimental performance showed that the ductility (strain at break reduction of 50%) was drastically limited with large sample dimensions. Printing setup and raster patterns exhibited a marginal influence on tensile performance. Each test revealed different dependencies with printing parameters, particularly under flexural loading conditions. A coarse printing setup, promoting a reduction of build cycle times, combined with bidirectional patterns looked like a promising way to improve the mechanical performance of 3D printed parts.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>","PeriodicalId":644,"journal":{"name":"Journal of Materials Engineering and Performance","volume":"12 1","pages":""},"PeriodicalIF":2.2000,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Engineering and Performance","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s11665-024-10007-6","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Material extrusion additive manufacturing was introduced in many industries due to some relevant features such as the capability to process complex geometries and internal microstructures, application of material combinations, low volume production, faster product development cycle and waste reduction. However, this technique also exhibits some drawbacks like highly restricted printable materials and a generally low mechanical performance. The wide variety of processing parameters combined with the influence of complex lattice structure, quality bonding and heating–cooling periods along the building cycle indicates that an extensive mechanical characterization should be performed to warrant the in-service success of 3D printed parts. This study aims to investigate the effect of material extrusion setup, raster pattern and specimen size on the tensile, flexural and fracture behavior. The experimental performance showed that the ductility (strain at break reduction of 50%) was drastically limited with large sample dimensions. Printing setup and raster patterns exhibited a marginal influence on tensile performance. Each test revealed different dependencies with printing parameters, particularly under flexural loading conditions. A coarse printing setup, promoting a reduction of build cycle times, combined with bidirectional patterns looked like a promising way to improve the mechanical performance of 3D printed parts.
摘要 材料挤压增材制造技术因其一些相关特性而被许多行业所采用，如加工复杂几何形状和内部微结构的能力、材料组合的应用、小批量生产、更快的产品开发周期和减少废料等。然而，这种技术也存在一些缺点，如可打印材料受到很大限制，机械性能普遍较低。加工参数种类繁多，再加上复杂的晶格结构、高质量的粘接和制造周期中的加热-冷却时间等因素的影响，表明应进行广泛的机械特性分析，以确保 3D 打印部件在使用中取得成功。本研究旨在探讨材料挤压设置、栅格模式和试样尺寸对拉伸、弯曲和断裂行为的影响。实验结果表明，试样尺寸越大，延展性（断裂应变减少 50%）越差。印刷设置和光栅图案对拉伸性能的影响微乎其微。每个测试都显示出印刷参数的不同依赖性，尤其是在弯曲加载条件下。粗略的打印设置有助于缩短构建周期，而双向模式则是提高三维打印部件机械性能的有效方法。
期刊介绍：
ASM International''s Journal of Materials Engineering and Performance focuses on solving day-to-day engineering challenges, particularly those involving components for larger systems. The journal presents a clear understanding of relationships between materials selection, processing, applications and performance.
The Journal of Materials Engineering covers all aspects of materials selection, design, processing, characterization and evaluation, including how to improve materials properties through processes and process control of casting, forming, heat treating, surface modification and coating, and fabrication.
Testing and characterization (including mechanical and physical tests, NDE, metallography, failure analysis, corrosion resistance, chemical analysis, surface characterization, and microanalysis of surfaces, features and fractures), and industrial performance measurement are also covered
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