3D Strain Field Evolution and Failure Mechanisms in Anisotropic Paperboard
نویسندگان
چکیده
Abstract Background Experimental analyses of the 3D strain field evolution during loading allows for better understanding deformation and failure mechanisms at meso- microscale in different materials. In order to understand auxetic behaviour delamination process paperboard materials tensile deformation, it is essential study out-of-plane component tensor that is, contrast previous 2D studies, only achievable 3D. Objective The main objective this obtain a influence structures in-plane material directions on samples. Methods X-ray tomography imaging in-situ uniaxial testing Digital Volume Correlation analysis was performed investigate mechanical two types commercial paperboards directions. sample properties such as spatial variation thickness, solid fraction fibre orientation distribution were also obtained from images. A comprehensive full lacking research, patterns well temporal quantification are novel contributions. Results results show volumetric deviatoric strain, dominated by normal tensor, localize centre already initial linear stress-strain regime. In-plane differ between samples loaded Machine Direction (MD) Cross (CD); MD, localizes more well-defined zone close notches occurs abruptly peak load, resulting angular fracture paths extending through stiffer surface planes CD, horizontal continuous bands fractures not clearly visible surfaces CD-tested appear fail internally well-distributed delamination. Conclusions localization preceded local increase i.e. initiation process, dramatic average thickening occurred. Different affected angles continuity failure, while structure how fields distributed within
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ژورنال
عنوان ژورنال: Experimental Mechanics
سال: 2021
ISSN: ['1741-2765', '0014-4851']
DOI: https://doi.org/10.1007/s11340-020-00681-7