On the influence of building position on dimensional accuracy and surface quality of aluminum blocks manufactured by L-PBF

Morvayová, Alexandra; Fabbiano, Laura; Contuzzi, Nicola; Casalino, Giuseppe

doi:10.1016/j.optlastec.2023.109830

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“…Technology downsides are related to the limited variety of available materials, material mechanical properties inhomogeneity, and surface quality [12]- [17]. This led to the need of evaluating the uncertainty of the manufactured specimen in terms of geometry and mechanical properties [18]- [20].…”

Section: Introductionmentioning

confidence: 99%

Time stability of the dynamic behaviour of a 3D-printed airless wheel by stereolithography

Annessi,

Quattrocchi,

Pasinetti

et al. 2023

Acta IMEKO

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In this paper, the dynamic behavior of an airless wheel made by additive manufacturing is investigated. A lattice geometry is chosen as the cyclic pattern from which the wheel is built. Initially, a linear numerical model is used to preliminarily assess resonance frequency and mode shapes of the wheel. Afterwards, specimens were tested twice, in August 2020 and after six months, highlighting a relevant frequency and damping shift in the vibrational response. To better understand the reason behind the change over time in the wheel dynamic behavior, dedicated structural dynamics tests at varying temperature and humidity set points were performed in an environmental chamber, consisting in measuring the wheel vibrational response when subjected to temperature and humidity variation.

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