熔丝制丙烯腈-丁二烯-苯乙烯零件力学行为的实验表征、理论建模和失效分析

IF 3.4 4区 工程技术 Q1 ENGINEERING, MECHANICAL Rapid Prototyping Journal Pub Date : 2023-10-03 DOI:10.1108/rpj-03-2023-0097
Roberto Junior Algarín Roncallo, Luis Lisandro Lopez Taborda, Diego Guillen
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引用次数: 0

摘要

本研究的目的是对增材制造(AM)中熔丝制造(FFF)丙烯腈-丁二烯-苯乙烯(ABS)的力学性能进行实验和数值研究。所获得的表征和力学模型用于预测假脚的弹性行为和用FFF制造的假膝的失效。设计/方法/方法进行了拉伸试验,并对不同材料方向的弹性模量、屈服应力和拉伸强度进行了评估。测定了材料的弹性常数,评价了填充密度对机械强度的影响。屈服面和失效准则是由试验产生的。三维应力下假体构件失效分析;用有限元法对案例进行了评价。实验结果表明,该材料具有横向各向同性。弹性模量、屈服应力和极限抗拉强度随填充密度呈线性变化。计算了应力和破坏准则,并与试验结果进行了比较,结果吻合较好。该研究可用于预测FFF或熔融沉积建模(FDM)产品的故障并提高其可靠性,适用于航空航天、汽车和医疗等高性能行业。本研究旨在通过提高基于故障准则的增材制造产品的可靠性,促进其在工业和医疗部门的广泛采用。独创性/价值所研究的大多数模型适用于平面应力情况和印刷材料的标准化样品。然而,本研究所采用的模型可以用于功能部件和三维应力,精度在其他研究人员的范围内。研究人员还提出了一种用于FFF和FDM工艺制备的脆性材料的力学研究方法。
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Experimental characterization, theoretical modeling and failure analysis of the mechanical behavior of acrylonitrile butadiene styrene parts by fused filament fabrication
Purpose The purpose of this research is present an experimental and numerical study of the mechanical properties of the acrylonitrile butadiene styrene (ABS) in the additive manufacturing (AM) by fused filament fabrication (FFF). The characterization and mechanical models obtained are used to predict the elastic behavior of a prosthetic foot and the failure of a prosthetic knee manufactured with FFF. Design/methodology/approach Tension tests were carried out and the elastic modulus, yield stress and tensile strength were evaluated for different material directions. The material elastic constants were determined and the influence of infill density in the mechanical strength was evaluated. Yield surfaces and failure criteria were generated from the tests. Failures over prosthetic elements in tridimensional stresses were analyzed; the cases were evaluated via finite element method. Findings The experimental results show that the material is transversely isotropic. The elasticity modulus, yield stress and ultimate tensile strength vary linearly with the infill density. The stresses and the failure criteria were computed and compared with the experimental tests with good agreement. Practical implications This research can be applied to predict failures and improve reliability in FFF or fused deposition modeling (FDM) products for applications in high-performance industries such as aerospace, automotive and medical. Social implications This research aims to promote its widespread adoption in the industrial and medical sectors by increasing reliability in products manufactured with AM based on the failure criterion. Originality/value Most of the models studied apply to plane stress situations and standardized specimens of printed material. However, the models applied in this study can be used for functional parts and three-dimensional stress, with accuracy in the range of that obtained by other researchers. The researchers also proposed a method for the mechanical study of fragile materials fabricated by processes of FFF and FDM.
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来源期刊
Rapid Prototyping Journal
Rapid Prototyping Journal 工程技术-材料科学:综合
CiteScore
8.30
自引率
10.30%
发文量
137
审稿时长
4.6 months
期刊介绍: Rapid Prototyping Journal concentrates on development in a manufacturing environment but covers applications in other areas, such as medicine and construction. All papers published in this field are scattered over a wide range of international publications, none of which actually specializes in this particular discipline, this journal is a vital resource for anyone involved in additive manufacturing. It draws together important refereed papers on all aspects of AM from distinguished sources all over the world, to give a truly international perspective on this dynamic and exciting area. -Benchmarking – certification and qualification in AM- Mass customisation in AM- Design for AM- Materials aspects- Reviews of processes/applications- CAD and other software aspects- Enhancement of existing processes- Integration with design process- Management implications- New AM processes- Novel applications of AM parts- AM for tooling- Medical applications- Reverse engineering in relation to AM- Additive & Subtractive hybrid manufacturing- Industrialisation
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