Abstract
In cellular lattice materials, fatigue failure assessment using an intricate finite element (FE) model of the entire specimen is neither feasible nor economical. To address this complex task, we propose a multi-step FE analysis methodology that can be employed for these metamaterials. FE models are created using the three-dimensional reconstructions from the μCT scans of the specimen. Subsequently, a combination of the average strain energy density approach and extreme value statistics is used to assess the fatigue behavior of the entire specimen. The methodology was employed on two types of cubic cellular lattice materials and validated using experimental fatigue results.
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