This article is focused on a case study of the topology optimisation of a bike stem manufactured by selective laser melting (SLM) additive technology. Topology optimisation was used as a design tool to model a part with less material used for transferring specific loads than the conventional method. For topology optimisation, Siemens NX 12 software was used with loads defined from the ISO 4210-5 standard. Post-processing of the topology-optimised shape was performed in Altair Inspire software. For this case study, the aluminium alloy AlSi10Mg was selected. For qualitative evaluation, the mechanical properties of the chosen alloy were measured on the tensile specimens. The design of the new bike stem was evaluated by Ansys FEA software with static loadings defined by ISO 4210-5. The functionality of the additively manufactured bike stem was confirmed by actual experiments defined by ISO 4210-5. The resulting new design of the bike stem passed both static tests and is 7.9% lighter than that of the reference.

Faculty of Mechanical Engineering Technical University of Liberec Studentská 1402 2 461 17 Liberec Czech Republic

The Institute for Nanomaterials Advanced Technologies and Innovation Technical University of Liberec Studentská 1402 2 461 17 Liberec Czech Republic

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Tofail S.A., Koumoulos E.P., Bandyopadhyay A., Bose S., O’Donoghue L., Charitidis C. Additive manufacturing: Scientific and technological challenges, market uptake and opportunities. Mater. Today. 2018;21:22–37. doi: 10.1016/j.mattod.2017.07.001. DOI

Frazier W.E. Metal additive manufacturing: A review. J. Mater. Eng. Perform. 2014;23:1917–1928. doi: 10.1007/s11665-014-0958-z. DOI

Hällgren S., Pejryd L., Ekengren J. (Re) Design for additive manufacturing. Procedia Cirp. 2016;50:246–251. doi: 10.1016/j.procir.2016.04.150. DOI

Mani M., Witherell P., Jee H. Design rules for additive manufacturing: A categorization; Proceedings of the International Design Engineering Technical Conferences and Computers and Information in Engineering Conference; Cleveland, OH, USA. 6–9 August 2017; New York, NY, USA: American Society of Mechanical Engineers; 2017. p. V001T02A035.

Thompson M.K., Moroni G., Vaneker T., Fadel G., Campbell R.I., Gibson I., Bernard A., Schulz J., Graf P., Ahuja B., et al. Design for Additive Manufacturing: Trends, opportunities, considerations, and constraints. CIRP Ann. 2016;65:737–760. doi: 10.1016/j.cirp.2016.05.004. DOI

Liu J., Gaynor A.T., Chen S., Kang Z., Suresh K., Takezawa A., Li L., Kato J., Tang J., Wang C.C., et al. Current and future trends in topology optimization for additive manufacturing. Struct. Multidiscip. Optim. 2018;57:2457–2483. doi: 10.1007/s00158-018-1994-3. DOI

Jihong Z., Han Z., Chuang W., Lu Z., Shangqin Y., Zhang W. A review of topology optimization for additive manufacturing: Status and challenges. Chin. J. Aeronaut. 2021;34:91–110.

Brackett D., Ashcroft I., Hague R. Topology optimization for additive manufacturing; Proceedings of the 2011 International Solid Freeform Fabrication Symposium; Austin, TX, USA. 8–10 August 2011; Austin, TX, USA: University of Texas at Austin; 2011.

Tyflopoulos E., Steinert M. A Comparative Study of the Application of Different Commercial Software for Topology Optimization. Appl. Sci. 2022;12:611. doi: 10.3390/app12020611. DOI

Wang L., Jiang X., Guo M., Zhu X., Yan B. Characterisation of structural properties for AlSi10Mg alloys fabricated by selective laser melting. Mater. Sci. Technol. 2017;33:2274–2282. doi: 10.1080/02670836.2017.1398513. DOI

Biffi C., Fiocchi J., Bassani P., Paolino D., Tridello A., Chiandussi G., Rossetto M., Tuissi A. Microstructure and preliminary fatigue analysis on AlSi10Mg samples manufactured by SLM. Procedia Struct. Integr. 2017;7:50–57. doi: 10.1016/j.prostr.2017.11.060. DOI

Magerramova L., Isakov V., Shcherbinina L., Gukasyan S., Petrov M., Povalyukhin D., Volosevich D., Klimova-Korsmik O. Design, Simulation and Optimization of an Additive Laser-Based Manufacturing Process for Gearbox Housing with Reduced Weight Made from AlSi10Mg Alloy. Metals. 2021;12:67. doi: 10.3390/met12010067. DOI

Read N., Wang W., Essa K., Attallah M.M. Selective laser melting of AlSi10Mg alloy: Process optimisation and mechanical properties development. Mater. Des. (1980–2015) 2015;65:417–424. doi: 10.1016/j.matdes.2014.09.044. DOI

Brandl E., Heckenberger U., Holzinger V., Buchbinder D. Additive manufactured AlSi10Mg samples using Selective Laser Melting (SLM): Microstructure, high cycle fatigue, and fracture behavior. Mater. Des. 2012;34:159–169. doi: 10.1016/j.matdes.2011.07.067. DOI

Moreno Nieto D., Moreno Sánchez D. Design for additive manufacturing: Tool review and a case study. Appl. Sci. 2021;11:1571. doi: 10.3390/app11041571. DOI

Jost E., Berez J., Saldaña C. A Case Study in Component Redesign for Additive Manufacturing Process Workflows; Proceedings of the 2022 International Solid Freeform Fabrication Symposium; Austin, TX, USA. 25–27 July 2022.

Soden P., Adeyefa B. Forces applied to a bicycle during normal cycling. J. Biomech. 1979;12:527–541. doi: 10.1016/0021-9290(79)90041-1. PubMed DOI

International Organization for Standardization; Geneva, Switzerland: 2014. Cycles—Safety Requirements for Bicycles—Part 5: Steering Test Methods.

ISO; Geneva, Switzerland: 2015. Additive Manufacturing—General Principles—Fundamentals and Vocabulary.

Kruth J.P., Wang X., Laoui T., Froyen L. Lasers and materials in selective laser sintering. Assem. Autom. 2003;23:357–371. doi: 10.1108/01445150310698652. DOI

Yap C.Y., Chua C.K., Dong Z.L., Liu Z.H., Zhang D.Q., Loh L.E., Sing S.L. Review of selective laser melting: Materials and applications. Appl. Phys. Rev. 2015;2:041101. doi: 10.1063/1.4935926. DOI

Khorasani M., Ghasemi A., Leary M., Downing D., Gibson I., Sharabian E.G., Veetil J.K., Brandt M., Bateman S., Rolfe B. Benchmark models for conduction and keyhole modes in laser-based powder bed fusion of Inconel 718. Opt. Laser Technol. 2023;164:109509. doi: 10.1016/j.optlastec.2023.109509. DOI

Tonelli L., Fortunato A., Ceschini L. CoCr alloy processed by Selective Laser Melting (SLM): Effect of Laser Energy Density on microstructure, surface morphology, and hardness. J. Manuf. Process. 2020;52:106–119. doi: 10.1016/j.jmapro.2020.01.052. DOI

Brif Y., Thomas M., Todd I. The use of high-entropy alloys in additive manufacturing. Scr. Mater. 2015;99:93–96. doi: 10.1016/j.scriptamat.2014.11.037. DOI

Lavecchia F., Pellegrini A., Galantucci L.M. Comparative study on the properties of 17-4 PH stainless steel parts made by metal fused filament fabrication process and atomic diffusion additive manufacturing. Rapid Prototyp. J. 2023;29:393–407. doi: 10.1108/RPJ-12-2021-0350. DOI

Li M., Du W., Elwany A., Pei Z., Ma C. Metal binder jetting additive manufacturing: A literature review. J. Manuf. Sci. Eng. 2020;142:090801. doi: 10.1115/1.4047430. DOI

Liverani E., Fortunato A., Leardini A., Belvedere C., Siegler S., Ceschini L., Ascari A. Fabrication of Co–Cr–Mo endoprosthetic ankle devices by means of Selective Laser Melting (SLM) Mater. Des. 2016;106:60–68. doi: 10.1016/j.matdes.2016.05.083. DOI

Mazur M., Leary M., McMillan M., Elambasseril J., Brandt M. SLM additive manufacture of H13 tool steel with conformal cooling and structural lattices. Rapid Prototyp. J. 2016;22:504–518. doi: 10.1108/RPJ-06-2014-0075. DOI

Armillotta A., Baraggi R., Fasoli S. SLM tooling for die casting with conformal cooling channels. Int. J. Adv. Manuf. Technol. 2014;71:573–583. doi: 10.1007/s00170-013-5523-7. DOI

Algara Muñoz V. Master’s Thesis. Universitat Politècnica de Catalunya; Barcelona, Spain: 2017. Analysis of the Optimal Parameters for 3D Printing Aluminum Parts with a SLM 280 Machine.

Li W., Li S., Liu J., Zhang A., Zhou Y., Wei Q., Yan C., Shi Y. Effect of heat treatment on AlSi10Mg alloy fabricated by selective laser melting: Microstructure evolution, mechanical properties and fracture mechanism. Mater. Sci. Eng. A. 2016;663:116–125. doi: 10.1016/j.msea.2016.03.088. DOI

Rosenthal I., Tiferet E., Ganor M., Stern A. Post-processing of AM-SLM AlSi10Mg specimens: Mechanical properties and fracture behaviour. Ann. “Dunarea Jos” Univ. Galati. Fascicle XII Weld. Equip. Technol. 2015;26:33–38.

Kempen K., Thijs L., Van Humbeeck J., Kruth J.P. Mechanical properties of AlSi10Mg produced by selective laser melting. Phys. Procedia. 2012;39:439–446. doi: 10.1016/j.phpro.2012.10.059. DOI

Rosenthal I., Stern A., Frage N. Microstructure and mechanical properties of AlSi10Mg parts produced by the laser beam additive manufacturing (AM) technology. Metallogr. Microstruct. Anal. 2014;3:448–453. doi: 10.1007/s13632-014-0168-y. DOI

Uzan N.E., Shneck R., Yeheskel O., Frage N. Fatigue of AlSi10Mg specimens fabricated by additive manufacturing selective laser melting (AM-SLM) Mater. Sci. Eng. A. 2017;704:229–237. doi: 10.1016/j.msea.2017.08.027. DOI

Maconachie T., Leary M., Zhang J., Medvedev A., Sarker A., Ruan D., Lu G., Faruque O., Brandt M. Effect of build orientation on the quasi-static and dynamic response of SLM AlSi10Mg. Mater. Sci. Eng. A. 2020;788:139445. doi: 10.1016/j.msea.2020.139445. DOI

Majeed A., Ahmed A., Salam A., Sheikh M.Z. Surface quality improvement by parameters analysis, optimization and heat treatment of AlSi10Mg parts manufactured by SLM additive manufacturing. Int. J. Lightweight Mater. Manuf. 2019;2:288–295. doi: 10.1016/j.ijlmm.2019.08.001. DOI

Casati R., Hamidi Nasab M., Coduri M., Tirelli V., Vedani M. Effects of platform pre-heating and thermal-treatment strategies on properties of AlSi10Mg alloy processed by selective laser melting. Metals. 2018;8:954. doi: 10.3390/met8110954. DOI

Liu Y., Yang Y., Wang D. A study on the residual stress during selective laser melting (SLM) of metallic powder. Int. J. Adv. Manuf. Technol. 2016;87:647–656. doi: 10.1007/s00170-016-8466-y. DOI

Zhang C., Zhu H., Liao H., Cheng Y., Hu Z., Zeng X. Effect of heat treatments on fatigue property of selective laser melting AlSi10Mg. Int. J. Fatigue. 2018;116:513–522. doi: 10.1016/j.ijfatigue.2018.07.016. DOI

ISO; Geneva, Switzerland: 2019. Metallic Materials—Tensile Testing—Part 1: Method of Test at Room Temperature.

Rosinha I.P., Gernaey K.V., Woodley J.M., Krühne U. Computer Aided Chemical Engineering. Volume 37. Elsevier; Amsterdam, The Netherlands: 2015. Topology optimization for biocatalytic microreactor configurations; pp. 1463–1468.

Bendsoe M.P., Sigmund O. Topology Optimization: Theory, Methods, and Applications. Springer Science & Business Media; Berlin/Heidelberg, Germany: 2003.

International A. Metals Handbook Vol. 2: Properties and Selection: Nonferrous Alloys and Special-Purpose Materials. ASM; Washington, DC, USA: 1990.

Limbasiya N., Jain A., Soni H., Wankhede V., Krolczyk G., Sahlot P. A comprehensive review on the effect of process parameters and post-process treatments on microstructure and mechanical properties of selective laser melting of AlSi10Mg. J. Mater. Res. Technol. 2022;21:1141–1176. doi: 10.1016/j.jmrt.2022.09.092. DOI

Rosenthal I., Shneck R., Stern A. Heat treatment effect on the mechanical properties and fracture mechanism in AlSi10Mg fabricated by additive manufacturing selective laser melting process. Mater. Sci. Eng. A. 2018;729:310–322. doi: 10.1016/j.msea.2018.05.074. DOI

Van Cauwenbergh P., Samaee V., Thijs L., Nejezchlebová J., Sedlak P., Iveković A., Schryvers D., Van Hooreweder B., Vanmeensel K. Unravelling the multi-scale structure–property relationship of laser powder bed fusion processed and heat-treated AlSi10Mg. Sci. Rep. 2021;11:6423. doi: 10.1038/s41598-021-85047-2. PubMed DOI PMC

Patakham U., Palasay A., Wila P., Tongsri R. MPB characteristics and Si morphologies on mechanical properties and fracture behavior of SLM AlSi10Mg. Mater. Sci. Eng. A. 2021;821:141602. doi: 10.1016/j.msea.2021.141602. DOI