Journal
VIRTUAL AND PHYSICAL PROTOTYPING
Volume 17, Issue 4, Pages 841-853Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/17452759.2022.2074196
Keywords
Time-variant reliability analysis framework; mixed probability and convex set model; process discretization scheme; morphology and microstructure observations; sequential iterative scheme; SLM
Funding
- National Natural Science Foundation of China [12172095, 51905116]
- Science and Technology Programme of Guangzhou [202102010428]
- Natural Science Foundation of Guangdong Province [2021A1515010320, 2019A1515011683]
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This paper proposes a time-variant reliability analysis framework to predict the lifetime of lattice structures fabricated by selective laser melting. Through experimental samples and numerical simulations, it is found that this method is efficient and accurate.
We propose a time-variant reliability analysis framework to quantitatively predict the lifetime of the lattice structures fabricated by selective laser melting (SLM), including confirming hybrid uncertainties, establishing a hybrid model, and proposing an efficient time-variant reliability method. We first design and manufacture a representative and complex L-shaped body-centred cubic (BCC) lattice structure utilising the SLM method, followed by morphology and microstructure observations to indicate the necessity of accounting for material uncertainty. Further considering loading fluctuation, we develop an effective time-variant reliability analysis method utilising the mixed probability and convex set model. One benchmark numerical example has been employed to shed a light on the high computational efficiency and acceptable computational accuracy of the developed time-variant reliability method. Finally, the proposed framework is performed to a real L-shaped BCC lattice structure to predict its lifetime, finding that the failure probability after ten years can reach more than 40 times the initial design.
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