Image‐based isogeometric twins of lattices with virtual image correlation for varying cross‐section beams. (4th February 2023)

• Record Type: Journal Article
• Authors: Passieux, Jean‐Charles; Bouclier, Robin; Weeger, Oliver
• Is Part Of: International journal for numerical methods in engineering. Volume 124:Number 10(2023)
• Page Start: 2237
• Page End: 2260
• Publication Date: 2023-02-04
• Subjects: cellular materials -- digital twin -- image‐based models -- isogeometric analysis -- lattices; Numerical analysis -- Periodicals; Engineering mathematics -- Periodicals; 620.001518
• DOI: 10.1002/nme.7208
• Languages: English
• ISSNs: 0029-5981

Abstract

Abstract: Cellular materials, in particular metal or polymer foams and beam lattices, are characterized by a complex architecture where the material is concentrated in slender struts. This study is concerned with the construction of numerically efficient sample‐specific digital twin for the analysis and characterization of the mechanical behavior of such meta‐materials. A method to build an explicit, light, and analysis‐suitable isogeometric beam model directly from digital images is proposed. More precisely, as a main contribution, the virtual image correlation method is extended to the case of multiple interconnected beams with varying cross‐sections. Special care is also given to the initialization for better efficiency and robustness. Synthetic and real examples of increasing complexity, that is, curved beams, lattices, and foams, are presented to account for the performance of the developed workflow from digital images to an isogeometric twin for mechanical modeling and simulation.