文章基本信息

标题：Multi-axial fatigue behaviour of titanium periodic cellular structures produced by Selective Laser Melting (SLM)
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作者：Khalil Refai ; Charles Brugger ; Marco Montemurro 等
期刊名称：MATEC Web of Conferences
电子版ISSN：2261-236X
出版年度：2019
卷号：300
页码：1-9
DOI：10.1051/matecconf/201930003004
语种：English
出版社：EDP Sciences
摘要：Additive manufacturing techniques such as selective laser melting (SLM) allow for manufacturing periodic porous titanium structures having complex geometry. The mechanical properties of these structures with diﬀerent elementary cell (ECs) designs have been already studied in literature. However, their fatigue behaviour is not yet well understood. This work aims at proposing a numerical approach to predict the periodic cellular structures fatigue behaviour under multiaxial loadings. The approach is based on an explicit description of the EC combined to an extreme statistical analysis making use of a fatigue indicator parameter to investigate (and compare) diﬀerent EC configurations. On the other hand, the numerical model relies on the use of a general numerical homogenisation scheme to properly apply the multi-axial loading conditions to the EC at the mesoscopic scale. Results show that lattice fatigue strength is strongly aﬀected by the relative density as well as by the geometrical features of the EC.