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On the effect of the node and building orientation on the fatigue behavior of L-PBF Ti6Al4V lattice structure sub-unital elements 节点和构建方向对L-PBF Ti6Al4V晶格结构亚单元元件疲劳行为的影响
Material Design & Processing Communications Pub Date : 2021-06-30 DOI: 10.1002/mdp2.258
Simone Murchio, Michele Dallago, Andrea Rigatti, Valerio Luchin, Filippo. Berto, Devid Maniglio, Matteo Benedetti
{"title":"On the effect of the node and building orientation on the fatigue behavior of L-PBF Ti6Al4V lattice structure sub-unital elements","authors":"Simone Murchio,&nbsp;Michele Dallago,&nbsp;Andrea Rigatti,&nbsp;Valerio Luchin,&nbsp;Filippo. Berto,&nbsp;Devid Maniglio,&nbsp;Matteo Benedetti","doi":"10.1002/mdp2.258","DOIUrl":"10.1002/mdp2.258","url":null,"abstract":"<p>Despite the great potential of additively manufactured (AM) metallic lattice materials, a comprehensive understanding of their mechanical behavior, particularly fatigue, has yet to be achieved. The role of the sub-unital lattice elements, that is, the struts and the nodes (or strut junctions), is rarely explored, even though it is well known that fatigue is a local phenomenon, determined by the small features of a structure (defects and local geometrical discontinuities).</p><p>In this work, the mechanical behavior of nodes and struts has been investigated by designing laser powder bed fusion (L-PBF) Ti6Al4V single strut specimens, with a node placed in the central part of the gauge length. The specimens were manufactured according to four different building orientations, namely, 90°, 45°, 15°, and 0° to the build plane. The influence of the fillet radius at the node and of the printing direction on the fatigue strength has been examined.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mdp2.258","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87000727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Correlation between as-designed and as-built Young's modulus of cubic regular, cubic irregular, and trabecular cellular materials 设计和建造的立方规则、立方不规则和小梁细胞材料的杨氏模量之间的关系
Material Design & Processing Communications Pub Date : 2021-06-22 DOI: 10.1002/mdp2.257
Sunil Raghavendra, Alberto Molinari, Gianluca Zappini, Matteo Benedetti
{"title":"Correlation between as-designed and as-built Young's modulus of cubic regular, cubic irregular, and trabecular cellular materials","authors":"Sunil Raghavendra,&nbsp;Alberto Molinari,&nbsp;Gianluca Zappini,&nbsp;Matteo Benedetti","doi":"10.1002/mdp2.257","DOIUrl":"10.1002/mdp2.257","url":null,"abstract":"<p>Laser powder bed fusion process is widely used in producing cellular materials for various applications. However, there are limitations in the process to produce high-porosity cellular materials with accuracy. A deviation is observed between the as-built and the as-designed geometrical parameters that lead to variation in the obtained stiffness of the cellular material. This study investigates the behavior of three cell topologies, cubic regular, cubic irregular, and trabecular under as-designed and as-built configurations to study their Young's modulus variation. The obtained results are compared with the ideal predictions of the Gibson–Ashby law to evaluate the deviation. Eventually, a linear correlation was developed between the as-designed and as-built Young's modulus to generate a database to select the as-designed geometry/properties to obtain the required as-built geometry/properties.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.257","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89629808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Printing and characterization of three-dimensional high-loaded nanocomposites structures 三维高载荷纳米复合材料结构的打印与表征
Material Design & Processing Communications Pub Date : 2021-06-05 DOI: 10.1002/mdp2.256
Corrado Sciancalepore, Federica Bondioli, Massimo Messori, Daniel Milanese
{"title":"Printing and characterization of three-dimensional high-loaded nanocomposites structures","authors":"Corrado Sciancalepore,&nbsp;Federica Bondioli,&nbsp;Massimo Messori,&nbsp;Daniel Milanese","doi":"10.1002/mdp2.256","DOIUrl":"10.1002/mdp2.256","url":null,"abstract":"<p>This study demonstrates the feasibility of fabricating by additive manufacturing composite objects based on acrylic hybrid photocurable formulations, containing 45% by weight of silica nanoparticles, with an average size of about 30 nm. A commercial stereolithography apparatus was used to selectively cure, layer by layer, the high-loaded acrylic resin. The presence of the filler determines an increase in the physical and mechanical properties of the samples that become significantly stiffer and stronger than the pristine matrix. Dynamic mechanical analysis performed on the printed samples gave promising results for the use of developed formulation in the realization of three-dimensional (3D) polymeric structures with improved mechanical properties.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.256","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77335040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Energy release as a parameter for fatigue design of additive manufactured metals 能量释放作为增材制造金属疲劳设计的参数
Material Design & Processing Communications Pub Date : 2021-05-29 DOI: 10.1002/mdp2.255
Dario Santonocito, Andrea Gatto, Giacomo Risitano
{"title":"Energy release as a parameter for fatigue design of additive manufactured metals","authors":"Dario Santonocito,&nbsp;Andrea Gatto,&nbsp;Giacomo Risitano","doi":"10.1002/mdp2.255","DOIUrl":"10.1002/mdp2.255","url":null,"abstract":"<p>Additive manufacturing (AM) is spreading in a wide range of industrial fields. The influence of the printing parameters on the mechanical performance is still an open issue among researchers, particularly when dealing with fatigue loads, which can lead to an unexpected failure. Classical fatigue tests require a large amount of time and materials to be consumed. Compared to the traditional fatigue assessment, the thermographic method (TM) is able to derive in a very rapid way the SN curve and fatigue limit of the material monitoring its energetic release during fatigue tests.</p><p>In this work, for the first time, the energetic release during fatigue test has been evaluated in specimens made of AISI 316L, obtained by SLM technique. Compared to literature data, the specimens show premature failure, even at low stress levels, with brittle fracture surfaces. The internal microstructure seems to be strictly related to the energetic release of the material.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.255","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73411650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Bending behavior of 3D printed sandwich beams with different core topologies 不同芯材拓扑结构的3D打印夹层梁的弯曲性能
Material Design & Processing Communications Pub Date : 2021-05-28 DOI: 10.1002/mdp2.252
Andrei Ioan Indreș, Dan Mihai Constantinescu, Oana Alexandra Mocian
{"title":"Bending behavior of 3D printed sandwich beams with different core topologies","authors":"Andrei Ioan Indreș,&nbsp;Dan Mihai Constantinescu,&nbsp;Oana Alexandra Mocian","doi":"10.1002/mdp2.252","DOIUrl":"10.1002/mdp2.252","url":null,"abstract":"<p>Lightweight core topologies have been considered as an advanced alternative to improve the overall performance of sandwich structures in bending. Designed sandwich beams containing 3D printed cores as conventional honeycomb, re-entrant auxetic honeycomb with two positions of the cells, and chiral topologies were created with CATIA V5. The sandwich beams were manufactured from polylactic acid polymer (PLA) by fused deposition modeling (FDM) using the Ultimaker 3 Extended printer. Three-point bending testing was conducted on sandwich beams using an Instron 8872 testing machine and following ASTM C393-20, as to obtain the strength, bending stiffness, and energy absorption of the sandwich beams for these three designed core topologies. Comments on the cores' performance and sandwich beams response are done together with observations concerning their failure.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.252","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"93118810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Fracture toughness in additive manufacturing by selective laser sintering: an overview 选择性激光烧结增材制造中的断裂韧性研究综述
Material Design & Processing Communications Pub Date : 2021-05-27 DOI: 10.1002/mdp2.254
Liviu Marșavina, Dan Ioan Stoia, Linul Emanoil
{"title":"Fracture toughness in additive manufacturing by selective laser sintering: an overview","authors":"Liviu Marșavina,&nbsp;Dan Ioan Stoia,&nbsp;Linul Emanoil","doi":"10.1002/mdp2.254","DOIUrl":"10.1002/mdp2.254","url":null,"abstract":"<p>This paper presents manufacturing, testing, and computing steps for determining the fracture toughness property of polyamide PA 2200 processed by laser sintering using different process parameters. The design of the samples was conducted according to ASTM D5045-99 and ASTM D5528-01, and the fracture tests consist of four-point bending in symmetric and asymmetric configuration and double cantilever beam test. The process parameters selected as variables were in-plane orientation, spatial orientation, energy density of the process, and induced structural defects. The results provide an extended view regarding the variation of fracture properties when the manufacturing conditions in laser sintering are changed.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.254","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78117963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Additive manufacturing in construction: A review on technologies, processes, materials, and their applications of 3D and 4D printing 建筑中的增材制造:3D和4D打印技术、工艺、材料及其应用综述
Material Design & Processing Communications Pub Date : 2021-05-26 DOI: 10.1002/mdp2.253
Gerardo Arcangelo Pacillo, Giovanna Ranocchiai, Federica Loccarini, Mario Fagone
{"title":"Additive manufacturing in construction: A review on technologies, processes, materials, and their applications of 3D and 4D printing","authors":"Gerardo Arcangelo Pacillo,&nbsp;Giovanna Ranocchiai,&nbsp;Federica Loccarini,&nbsp;Mario Fagone","doi":"10.1002/mdp2.253","DOIUrl":"10.1002/mdp2.253","url":null,"abstract":"<p>In this paper, the current state of the art of additive manufacturing (AM) in the construction industry to manufacture on large scales is reviewed. The central concept of AM was defined, and it has been highlighted in the large use in several sectors. The main advantages that AM offers in the construction industry were described with at the same time the most important challenges that need to be addressed for real use. The main AM technologies solutions on large scales were described from more compact solutions like gantry technology to more flexible and free technology solutions. The choice of an AM solution rather than another is closely linked to the materials to be used and the building component to be built. Regarding materials, the research focused on materials based on aggregates, metals, and polymers. The application of AM in the construction field requires more studies and further research.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.253","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81627467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Post-processing technologies of copper–polylactic acid composites obtained by 3D printing fused deposition modeling 3D打印熔融沉积建模获得的铜-聚乳酸复合材料后处理技术
Material Design & Processing Communications Pub Date : 2021-05-22 DOI: 10.1002/mdp2.251
Sebastian Ambruș, Roxana Muntean, Norbert Kazamer, Cosmin Codrean
{"title":"Post-processing technologies of copper–polylactic acid composites obtained by 3D printing fused deposition modeling","authors":"Sebastian Ambruș,&nbsp;Roxana Muntean,&nbsp;Norbert Kazamer,&nbsp;Cosmin Codrean","doi":"10.1002/mdp2.251","DOIUrl":"10.1002/mdp2.251","url":null,"abstract":"<p>The goal of the present study is to obtain a new structured material starting from a copper–polylactic acid (PLA) composite filament 3D printed using fused deposition modeling method, followed by a sintering process in vacuum atmosphere. Metal-reinforced filaments made of 80 wt.% copper encased in an environmentally friendly, biodegradable and carbon neutral PLA binder were used as feedstock materials. The thermal stability and the melting temperature of the filaments were evaluated through thermogravimetric analysis. The printing parameters were chosen according to the producer's specifications. Furthermore, the printed samples were submitted to a two-step sintering process in a vacuum furnace, assuring a complete removal of the polymeric material and the diffusion of the copper particles. The post-treatment revealed a porous structured material, similar to a cellular solid. Microstructural analysis and preliminary mechanical testing show that the porosity and hardness of the end product are heavily influenced by the initial polymer content.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.251","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77712763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Mechanical properties comparison between new and recycled polyethylene terephthalate glycol obtained from fused deposition modelling waste 从熔融沉积建模废料中获得的新聚对苯二甲酸乙二醇酯和回收聚对苯二甲酸乙二醇酯的力学性能比较
Material Design & Processing Communications Pub Date : 2021-05-17 DOI: 10.1002/mdp2.250
Lorenzo Bergonzi, Matteo Vettori
{"title":"Mechanical properties comparison between new and recycled polyethylene terephthalate glycol obtained from fused deposition modelling waste","authors":"Lorenzo Bergonzi,&nbsp;Matteo Vettori","doi":"10.1002/mdp2.250","DOIUrl":"10.1002/mdp2.250","url":null,"abstract":"<p>The recycling of materials and the efficient use of resources are nowadays fundamental in a circular economy perspective. This concept also applies to additive manufacturing (AM) where waste can be reused to produce new material. Using mostly thermoplastic polymers, fused deposition modeling (FDM) is an AM technique that allows to melt waste materials and, successively, using a suitable extruder, obtain new filament. In the process, polymers are subject to multiple re-melting and polymer orientations by extrusion operations. The aim of this work is to evaluate the influence of the recycling process over polyethylene terephthalate glycol-modified (PETG) mechanical properties by tensile testing of samples produced using pure and recycled material. Furthermore, filament itself has been tested to evaluate recycle process influence before FDM printing.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.250","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76472262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Numerical evaluation of high cycle fatigue life for additively manufactured stainless steel 316L lattice structures: Preliminary considerations 增材制造316L不锈钢晶格结构高周疲劳寿命的数值评价:初步考虑
Material Design & Processing Communications Pub Date : 2021-05-17 DOI: 10.1002/mdp2.249
Gianluca Alaimo, Massimo Carraturo, Nina Korshunova, Stefan Kollmannsberger
{"title":"Numerical evaluation of high cycle fatigue life for additively manufactured stainless steel 316L lattice structures: Preliminary considerations","authors":"Gianluca Alaimo,&nbsp;Massimo Carraturo,&nbsp;Nina Korshunova,&nbsp;Stefan Kollmannsberger","doi":"10.1002/mdp2.249","DOIUrl":"10.1002/mdp2.249","url":null,"abstract":"<p>Lattice components manufactured by selective laser melting processes are increasingly employed for producing high performing lightweight parts to be used in several industrial applications. However, the geometry at a submillimeter scale can exhibit not negligible differences with respect to the nominal design due to the high complexity of the manufacturing process. Accordingly, the mechanical behavior of lattice structures is strongly influenced by such process-induced geometrical defects. Therefore, to numerically predict the fatigue behavior of lattice components, the as-built geometry, as acquired, for instance, by means of micro-computed tomography, should be considered. In this work, we employ an immersed boundary method, namely, the finite cell method, to develop a numerical framework suitable to compute fatigue life directly on an as-built lattice geometry.</p>","PeriodicalId":100886,"journal":{"name":"Material Design & Processing Communications","volume":"3 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/mdp2.249","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79409165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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