#experimental #simulative #additive manufacturing

Characterization of PBF particle dampers with thin cavities

Over the past few years, additive manufacturing (AM) has enjoyed considerable research attention and has become an established manufacturing process in the aerospace and high-performance automotive industries [1]. In particular, powder bed based fusion (PBF) has expanded lightweighting opportunities in these industries through its manufacturing capability of stiffness-optimized and integral components. However, the resulting lightweight, stiff, and integral components tend to have low damping, making them susceptible to vibration. For this reason, various structural damping options for PBF components have been and are being explored. One possibility is particle damping, in which loose powder remains in the component during the manufacturing process and dissipates kinetic energy into thermal energy under vibration due to friction and inelastic impacts, damping the vibration.

The damping effect of these particle dampers has been shown in some studies [2-16] and investigated in a recent study [17] for thin cavities on AlSi10Mg specimens. The thin cavities have the advantage of being able to be integrated into planar components such as turbine blades without greatly affecting the static integrity of the planar component. Now the damping properties are to be further characterized experimentally and accompanied by simulation. 

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Literature

Sources

  1. Liu G, Zhang X, Chen X et al. (2021) Additive manufacturing of structural materials. Mater Sci Eng.: R: Rep 145:1–67. https://doi.org/10.1016/j.mser.2020.100596
  2. Scott-Emuakpor O, Beck J, Runyon B et al. (2021) Determining unfused powder threshold for optimal inherent damping with additive manufacturing. Addit Manuf 38:1–9. https://doi.org/10.1016/j.addma.2020.101739
  3. Künneke T, Zimmer D (2021) Konstruktionsregeln für additiv gefertigte Partikeldämpfer/Design rules for additive manufactured particle dampers. Konstruktion 73:72–78. https://doi.org/10.37544/0720-5953-2021-11-12-72
  4. Goldin A, Scott-Emuakpor O, George T et al. (2021) Structural Dynamic and Inherent Damping Characterization of Additively Manufactured Airfoil Components. J Eng Gas Turbines Power 143:1-8. https://doi.org/10.1115/1.4050022
  5. Scott-Emuakpor O, Sheridan L, Runyon B et al. (2020) Vibration Fatigue Assessment of Additive Manufactured Nickel Alloy With Inherent Damping. In: Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine; Microturbines, Turbochargers, and Small Turbomachines, 1st edn. American Society of Mechanical Engineers, pp 1–9
  6. Scott-Emuakpor O, Schoening A, Goldin A et al. (2020) Internal Geometry Effects on Inherent Damping Performance of Additively Manufactured Components. AIAA J 59:379–385. https://doi.org/10.2514/1.J059709
  7. Scott-Emuakpor O, George T, Runyon B et al. (2020) Assessing Additive Manufacturing Repeatability of Inherently Damped Nickel Alloy Components. J Eng Gas Turbines Power 142:031011-1-8. https://doi.org/10.1115/1.4044314
  8. Scott-Emuakpor O, Beck J, Runyon B et al. (2020) Validating a Multifactor Model for Damping Performance of Additively Manufactured Components. AIAA J 58:5440–5447. https://doi.org/10.2514/1.J059608
  9. Scott-Emuakpor O, Beck J, Runyon B et al. (2020) Multi-Factor Model for Improving the Design of Damping in Additively Manufactured Components. In: AIAA Scitech 2020 Forum, 1st edn. American Institute of Aeronautics and Astronautics, pp 1–12
  10. Ehlers T, Lachmayer R (2020) Einsatz additiv gefertigter Partikeldämpfer – eine Übersicht. In: Kaierle S, Rettschlag K, Lachmayer R (eds) Konstruktion für die Additive Fertigung 2019, 1st edn. Springer Vieweg, Berlin, Heidelberg, pp 123–142
  11. Scott-Emuakpor O, George T, Runyon B et al. (2019) Sustainability Study of Inherent Damping in Additively Manufactured Nickel Alloy. AIAA J 57:456–461. https://doi.org/10.2514/1.J057608
  12. Scott-Emuakpor O, George T, Beck J et al. (2019) Inherent Damping Sustainability Study on Additively Manufactured Nickel-Based Alloys for Critical Part. In: AIAA Scitech 2019 Forum, 1st edn. American Institute of Aeronautics and Astronautics, pp 1–19
  13. Scott-Emuakpor O, George T, Runyon B et al. (2018) Forced-Response Verification of the Inherent Damping in Additive Manufactured Specimens. In: Kramer S, Jordan JL, Jin H et al. (eds) Mechanics of Additive and Advanced Manufacturing, Volume 8, 1st edn. Springer International Publishing, Cham, pp 81–86
  14. Scott-Emuakpor O, George T, Runyon B et al. (2018) Investigating Damping Performance of Laser Powder Bed Fused Components With Unique Internal Structures. In: Volume 7C: Structures and Dynamics, 1st edn. American Society of Mechanical Engineers, pp 1–10
  15. Ehlers T, Tatzko S, Wallaschek J et al. (2021) Design of particle dampers for additive manufacturing. Addit Manuf 38:1–19. https://doi.org/10.1016/j.addma.2020.101752
  16. Ehlers T, Lachmayer R (2022) Design of Particle Dampers for Laser Powder Bed Fusion. Appl Sci 12:2237. https://doi.org/10.3390/app12042237
  17. Westbeld J, Coburg F von, Höfer P (2023) Forced-response characterization of PBF-LB/AlSi10Mg particle dampers with thin and flat cavities. PiAM

Contact

Julius Westbeld M.Sc.

Julius Westbeld M.Sc.

Research associate
Gebäude 37, Zimmer 037/1106
+49 (89) 6004-5614
julius.westbeld@unibw.de