Biaxial (In-Plane) Failure and Yield of Paperboard
2016 (English)In: / [ed] Samuel Schabel, 2016Conference paper, Abstract (Other academic)
Understanding the biaxial (in-plane) failure behavior of paperboard is crucial to understand the limits of 3-D forming of paper materials, because the biaxial strain failure limit determines the extent to which paperboard can be formed in different conditions.
A traditional cruciform biaxial specimen has been redesigned and modified with the help of laser engraving. By the use of laser engraving, 90 % of the effective thickness of the specimen in the center of the cruciform was removed, thus making the cruciform specimen more likely to fail in the center than at the edges. A variety of strain ratios were utilized to test the specimens with a biaxial testing machine, and the strain field was measured utilizing digital image correlation.
The results of the biaxial testing were analyzed in order to determine both the strain-based yield and failure surfaces. Additionally, the stresses in the center of the specimen were estimated based on the forces measured during the test. Based on these estimated stresses, stress-based yield and failure surfaces were also constructed. Furthermore, various models for the strain- and stress-based yield surfaces were applied to the data and compared.
Place, publisher, year, edition, pages
Engineering and Technology Applied Mechanics
Research subject Solid Mechanics
IdentifiersURN: urn:nbn:se:kth:diva-203359OAI: oai:DiVA.org:kth-203359DiVA: diva2:1082046
Progress in Paper Physics Seminar 2016, 22-26 September, 2016, Darmstadt, Germany
QC 201703212017-03-152017-03-152017-03-21Bibliographically approved