Modeling the properties of closed-cell cellular materials from tomography images using finite shell elements

摘要: Closed-cell cellular materials exhibit several interesting properties. These properties are, however, very difficult to simulate and understand from the knowledge of microstructure. This problem is mostly due highly complex organization cells their fine walls. X-ray tomography can produce three-dimensional (3-D) images structure, enabling one visualize locally damage cell walls that would result in structure collapsing. data could be used for meshing with continuum elements finite element (FE) calculations. But when density low, are meshes based on not suitable represent accurately while preserving representativeness model terms size. paper presents a shell FE obtained tomographic 3-D allows bigger volumes low-density closed-cell calculated. The enriched by direct thickness measurement images. values measured ascribed elements. To validate use model, composed stainless steel hollow spheres firstly compressed scanned observe local deformations. also meshed shells calculation. convergence checked its performance compared model. global behavior measures compression test. At scale, stress strain field calculated deformed shape