Abstract
Metamaterials exhibit significantly different mechanical deformation than in classical “first-order” theory. One possible modeling approach is to use a “straingradient” theory by incorporating also higher gradients of displacements into the formulation. This procedure clearly brings in additional constitutive parameters. In this study, a numerical framework is presented by applying strain-gradient theory to 3-D printed structures with an infill ratio used frequently in additive manufacturing for weight reduction. This choice causes metamaterials; the additional constitutive parameters in the strain-gradient model are determined by an asymptotic homogenization. In order to demonstrate the reliability of this methodology, we verify the accuracy by computations using the finite element method.
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Aydin, G., Yildizdag, M.E., Abali, B.E. (2022). Strain-Gradient Modeling and Computation of 3-D Printed Metamaterials for Verifying Constitutive Parameters Determined by Asymptotic Homogenization. In: Giorgio, I., Placidi, L., Barchiesi, E., Abali, B.E., Altenbach, H. (eds) Theoretical Analyses, Computations, and Experiments of Multiscale Materials. Advanced Structured Materials, vol 175. Springer, Cham. https://doi.org/10.1007/978-3-031-04548-6_16
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