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Experimental determination of residual stresses in paperboard |
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| Authors: | M Östlund S Östlund L A Carlsson C Fellers |
| Institution: | (1) KTH Solid Mechanics, Osauars backe 1, SE-100 44 Stockholm, LA, Sweden;(2) Florida Atlantic University, 777 Glades Road, P.O. Box 3091, 33431-0991 Boca Raton, FL, USA;(3) Department of Mechanical Engineering, 33431-0991 Boca Raton, FL, USA;(4) STFI-Packforsk AB, Box 5604, SE-114 86 Stockholm, Sweden |
| Abstract: | A method for the experimental determination of the through-thickness residual stress distribution in paperboard is presented. The successive removal of thin layers from strips of board through surface grinding changes the stress-state and the bending stiffness resulting in a changed curvature, which is measurable. From tests of strips in both in-plane directions, stress distributions can then be evaluated using the Treuting-Read method. Geometrically nonlinear effects at the large deformations taking place are avoided through a proper choice of strip dimensions. Typical results are presented and factors influencing the accuracy of the determination are thoroughly discussed. |
| Keywords: | Residual stress paperboard surface grinding curl measurement Treuting-Read method |
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