Phenomenological analysis of constrained in-plane compression of paperboard using micro-computed tomography Imaging

Abstract Large deformations under in-plane compression of paperboard appear in forming processes like hydroforming, pressforming and deep drawing, but the mechanisms deformation have not been studied on a micromechanical level. A constrained test is presented. This allows for compression, buckling, wrinkling compaction. The realized using DEBEN CT-500 in-situ tester laboratory microtomography synchrotron microtomography. Experiments with five different materials spanning from handsheets to commercially available multi-layered paperboards are performed. Image processing used observe local out-of-plane fiber orientation phenomenological investigation behavior these Delamination found be primary failure boards. Furthermore, porous network structure, created by long minimally refined softwood fibers, facilitate formation uniform wrinkles