Per Gradin

Publications

Articles in journals
Conference papers
Manuscripts
Reports

Articles in journals

Persson, J. , Gradin, P. & Nyström, S. (2021). The contact stress distribution in a double tapered bolt joint. Journal of Testing and Evaluation, vol. 49: 4, pp. 3028-3034.  

Nyström, J. , Gradin, P. & Thörnberg, B. (2018). An experimental study of the chipping process with focus on energy consumption and chipping angles. Nordic Pulp & Paper Research Journal, vol. 33: 3, pp. 460-467.  

Gradin, P. , Berg, J. & Nyström, S. (2016). Measuring Tangential Forces in a Pulp Refiner : A Novel Approach. Experimental techniques (Westport, Conn.), vol. 40: 2, pp. 789-793.  

Hellström, L. M. , Biller, S. , Edvardsson, S. & Gradin, P. A. (2014). A theoretical and experimental study of the circular sawing process. Holzforschung, vol. 68: 3, pp. 307-312.  

Isaksson, P. , Gradin, P. A. & Hellström, L. M. (2013). A numerical and experimental study regarding the influence of some process parameters on the damage state in wood chips. Holzforschung, vol. 67: 6, pp. 691-696.  

Lusth, H. , Gradin, P. A. & Hellström, L. M. (2013). A theoretical model for the prediction of energy consumption during the chipper canter process. Nordic Pulp & Paper Research Journal, vol. 28: 2, pp. 211-215.  

Edvardsson, S. , Gradin, P. , Isaksson, P. & Gulliksson, M. (2012). A Note on Wet Paper Web Adhesion Strength. Journal of Testing and Evaluation, vol. 40: 4, pp. 682-686.  

Hellström, L. , Carlberg, T. , Engstrand, P. , Gradin, P. & Gregersen, Ø. (2012). Evaluation Of Collimated Chipping Technology For Reducing Energy Consumption In Mechanical Pulping. Journal of Science & Technology for Forest Products and Processes, vol. 2: 3, pp. 6-9.

Lusth, H. , Gradin, P. A. & Hellström, L. M. (2012). The dependency of energy consumption on cutting angles in the canter chipping process. Nordic Pulp & Paper Research Journal, vol. 27: 5, pp. 886-889.    

Hellström, L. , Gradin, P. , Gulliksson, M. & Carlberg, T. (2011). A laboratory wood chipper for chipping under realistic conditions. Experimental mechanics, vol. 51: 8, pp. 1309-1316.  

Gradin, P. , Isaksson, P. & Gulliksson, M. (2011). A Note on the Co-linearity of forces and Displacements in an Elastic Structure. Journal of Applied Fluid Mechanics, vol. 78: 6, pp. Art. no. 4003912  

Edvardsson, S. , Gradin, P. & Isaksson, P. (2011). On dissipative effects of paper web adhesion strength. International Journal of Solids and Structures, vol. 48: 1, pp. 24-30.  

Hellström, L. , Gradin, P. , Engstrand, P. & Gregersen, Ø. (2011). Properties of wood chips for thermomechanical pulp (TMP) production as a function of spout angle. Holzforschung, vol. 65: 6, pp. 805-809.  

Isaksson, P. , Gradin, P. & Östlund, S. (2010). A simplified treatise of the Scott bond testing method. Experimental mechanics, vol. 50: 6, pp. 745-751.  

Olsen, M. , Gradin, P. , Lindefelt, U. & Olin, H. (2010). Nonharmonic oscillations of nanosized cantilevers due to quantum-size effects. Physical Review B Condensed Matter, vol. 81: 5, pp. 054304      

Hellström, L. M. , Isaksson, P. , Gradin, P. A. & Eriksson, K. (2009). An Analytical and Numerical Study of some aspects of the Wood Chipping Process. Nordic Pulp & Paper Research Journal, vol. 24: 2, pp. 225-230.    

Svensson, B. A. , Nyström, S. K. , Gradin, P. A. & Höglund, H. (2009). Frictional testing of wood : Initial studies with a new device. Tribology International, vol. 42: 1, pp. 190-196.  

Berg, J. , Gulliksson, M. E. & Gradin, P. A. (2009). On the energy consumption for crack development in fibre wall in disc refining - A micromechanical approach. Holzforschung, vol. 63: 2, pp. 204-210.  

Isaksson, P. & Gradin, P. (2009). Shear buckling in the core of a corrugated board structure. Composite structures, vol. 88: 4, pp. 610-614.  

Hellström, L. M. , Gradin, P. A. & Carlberg, T. (2008). A Method for Experimental Investigation of the Wood Chipping Process. Nordic Pulp & Paper Research Journal, vol. 23: 3, pp. 339-342.    

Holmgren, S. , Svensson, B. A. , Gradin, P. A. & Lundberg, B. (2008). An Encapsulated Split Hopkinson Pressure Bar for Testing of Wood at Elevated Strain Rate, Temperature and Pressure. Experimental techniques (Westport, Conn.), vol. 32: 5, pp. 44-50.  

Norgren, S. , Gradin, P. A. , Nyström, S. & Gullikson, M. (2008). Investigation of the z-direction strength properties of paper by use of acoustic emission monitoring. Journal of Acoustic Emission, vol. 26, pp. 23-31.

Gradin, P. , Graham, D. , Nygård, P. & Vallen, H. (2008). The Use of Acoustic Emission Monitoring to Rank Paper Materials With Respect to their Fracture Toughness. Experimental mechanics, vol. 48: 1, pp. 133-137.  

Kulachenko, A. , Gradin, P. & Uesaka, T. (2007). Basic mechanisms of fluting formation and retention in paper. Mechanics of materials, vol. 39: 7, pp. 643-663.  

Torgnysdotter, A. , Kulachenko, A. , Gradin, P. & Wågberg, L. (2007). Fiber/Fiber crosses : Finite Element Modelling and Comparison with Experiment. Journal of composite materials, vol. 41: 13, pp. 1603-1608.  

Krusper, A. , Isaksson, P. & Gradin, P. A. (2007). Modelling of out-of-plane compression loading of corrugated paper board structures. Journal of engineering mechanics, vol. 133: 11, pp. 1171-1177.  

Kulachenko, A. , Gradin, P. & Kuivurova, H. (2007). Modelling the dynamical behaviour of a paper web : Part I. Computers and Structures, vol. 85: 3-4, pp. 131-147.  

Kulachenko, A. , Gradin, P. & Kuivurova, H. (2007). Modelling the dynamical behaviour of a paper web : Part II. Computers and Structures, vol. 85: 3-4, pp. 148-157.  

Isaksson, P. , Krusper, A. & Gradin, P. A. (2007). Shear correction factors for corrugated core structures. Composite structures, vol. 80: 1, pp. 123-130.  

Torgnysdotter, A. , Kulachenko, A. , Gradin, P. & Wågberg, L. (2007). The Link Between the Fiber Contact Zone and the Physical Properties of Paper : A Way to Control Paper Properties. Journal of composite materials, vol. 41: 13, pp. 1619-1633.  

Batchelor, W. J. , Westerlind, B. S. , Hägglund, R. & Gradin, P. (2006). Effect of test conditions on measured loads and displacements in zero-span testing. TAPPI Journal, vol. 5: 10, pp. 3-8.

Isaksson, P. , Kulachenko, A. & Gradin, P. A. (2006). The onset and progression of damage in isotropic paper sheets. International Journal of Solids and Structures, vol. 43: 3-4, pp. 713-726.  

Isaksson, P. & Gradin, P. A. (2005). A bending specimen for constant energy release rate under controlled displacement conditions. Engineering Fracture Mechanics, vol. 72: 11, pp. 1770-1775.  

Kulachenko, A. , Gradin, P. A. & Westerlind, B. (2005). Analysis of Paper Web Tension Profiles. Journal of Graphic Technology, : 2, pp. 72-81.

Isaksson, P. , Hägglund, R. & Gradin, P. (2004). Continuum damage mechanics applied to paper. International Journal of Solids and Structures, vol. 41: 16-17, pp. 4731-4755.  

Hägglund, R. , Gradin, P. & Tarakameh, D. (2004). Some Aspects on the Zero-span tensile test. Experimental mechanics, vol. 44: 4, pp. 365-374.  

Semb, G. , Gradin, P. & Hällgren, I. (2003). An Analytical Study of a Composite Dove Tail Joint. Journal of Composite Materials, vol. 37: 2, pp. 99-109.

Semb, G. & Gradin, P. A. (2002). Stresses and Strains in a Race Track Strap with a radical clearance. International Journal of Solids and Structures, vol. 39: 3, pp. 699-708.  

Widehammar, S. , Gradin, P. & Lundberg, B. (2001). Approximate determination of Dispersion Relations and Displacement Fields Associated With Elastic Waves in Bars. Journal of Sound and Vibration, vol. 246: 5, pp. 853-876.  

Berg, J. & Gradin, P. A. (2000). Effect of Temperature on Fracture of Spruce in Compression, Investigated by Use of Acoustic Emission Monitoring. Journal of Pulp and Paper Science (JPPS), vol. 26: 8, pp. 294-299.

Berg, J. & Gradin, P. A. (1999). A Micromechanical Model of the Deterioration of a Wood Fibre. Journal of Pulp and Paper Science, vol. 25: 2, pp. 66-71.

Gradin, P. A. , Johansson, O. , Berg, J. & Nyström, S. (1999). Measurement of the Power Distribution in a Single Disc Refiner. Journal of Pulp and Paper Science, vol. 25: 11, pp. 384-387.

Conference papers

Engstrand, P. , Gradin, P. , Hellström, L. , Carlberg, T. , Sandström, P. , Liden, J. , Söderberg, M. & Mats, E. (2016). Improved refining energy efficiency in thermo-mechanical pulping by means of collimated wood chipping – from solid mechanics to full scale evaluation. In PaperWeek Canada 2016 Conference February 1 to 5, 2016, Montreal : Technical Track Program.

Hellström, L. , Carlberg, T. , Engstrand, P. , Gradin, P. & Gregersen, Ø. (2011). Collimated chipping technology in order to reduce the energy consumption in mechanical pulping. In Proceeding for International Mechanical Pulping Conference, Xi'an, P.R. of China.. pp. 457--460.

Gradin, P. , Berg, J. , Gulliksson, M. & Nyström, S. (2011). Measuring forces in a refiner plate gap. In Proceedings of International Mechanical Pulping Conference.. pp. 81--83.

Hellström, L. M. , Gradin, P. A. & Carlberg, T. (2009). A device for studying wood chipping under realistic conditions. In Proceedings - 2009 International Mechanical Pulping Conference, IMPC 2009. (SPCI meddelande). pp. 252--254.

Berg, J. & Gradin, P. A. (2009). Fibre wall crack development. In Proceedings - 2009 International Mechanical Pulping Conference, IMPC 2009. (SPCI meddelande). pp. 340--343.

Norgren, S. & Gradin, P. (2009). Using acoustic emission monitoring to evaluate the through the thickness and in plane strength properties. In Proceedings - 2009 International Mechanical Pulping Conference, IMPC 2009.. pp. 298--303.

Hellström, L. M. , Gradin, P. A. & Carlberg, T. (2008). A Study of Fracture processes in Wood Chipping. In 6th Fundamental Mechanical Pulp Research Seminar. Espoo :

Norgren, S. , Gradin, P. , Nyström, S. & Gulliksson, M. (2008). Investigation of the Z-direction strength properties of paper by use of acoustic emission monitoring. In 28th European conferance on acoustic emission testing.. pp. 238--243.

Gradin, P. , Graham, D. , Nygård, P. & Vallen, H. (2008). The use of acoustic emission monitoring to rank paper materials with respect to their fracture toughness. In Proceedings of the Society for Experimental Mechanics, Inc... pp. 133--137.

Isaksson, P. , Gradin, P. & Östlund, S. (2007). A simplified treatise of the Scott bond testing method. In Proceedings of the 2007 International Paper Physics Conference, May 6-11, 2007, Gold Coast, Qld, Australia, 1-6, 2007.

Svensson, B. A. , Holmgren, S. , Gradin, P. A. & Höglund, H. (2007). High Strain Rate Compression and Sliding Friction of Wood under Refining Conditions. In International Mechanical Pulping Conference 2007, TAPPI.. pp. 983--994.

Hellström, L. , Gradin, P. & Carlberg, T. (2007). Strain Distribution in Wood During Chipping. In International Mechanical Pulping Conference 2007, TAPPI.. pp. 251--255.

Kulachenko, A. , Gradin, P. A. & Uesaka, T. (2006). Basic mechanisms of fluting. In 92nd Annual Meeting Preprints-Book A, 7 Feb. 2006 , Canada. Que., Canada : . pp. 161--173.

Kulachenko, A. , Gradin, P. & Uesaka, T. (2005). Tension wrinkling and fluting in heatset web offset printing process : post buckling analysis. In Advances in Paper Science and Technology : Transactions of the 13th fundamental research symposium, Vols 1-3.. pp. 1075--1099.

Kulachenko, A. , Gradin, P. & Uesaka, T. (2005). The effect of local moisture variations on fluting in heatset web offset printing. In Proc. of 5th Biennial Johan Gullichsen Colloquium.

Gradin, P. A. , Isaksson, P. , Nyström, S. K. , Graham, D. , Kao, D. & Knight, B. (2004). Acoustic Emission applied to mechanically loaded Paper. In EWGAE (European Working Group on Acoustic Emission) 2004 proceedings.. pp. 423--431.

Torgnysdotter, A. , Kulachenko, A. , Gradin, P. & Wågberg, P. (2004). Modification of the Contact Zone to Control the Physical Behaviour of Paper - A Model Experiment : Pappersfysik konferens i Trondheim ?.

Isaksson, P. , Hägglund, R. & Gradin, P. (2003). A continuum damage elastic-plastic model for packaging paper. In 2003 International Paper Physics Conference. Proceedings.. pp. 207--210.

Batchelor, W. J. , Westerlind, B. , Hägglund, R. & Gradin, P. A. (2003). Effect of test conditions on measured loads and displacements in zero and short span testing. Paper presented at the International Paper Physics Conference, Proceedings

Backlund, H. , Höglund, H. & Gradin, P. (2003). Study of tangential forces and temperature profiles in commercial refiners. In 2003 International Mechanical Pulping Conference.. pp. 379--388.

Svensson, B. , Nyström, S. K. , Gradin, P. , Bergfors, E. & Höglund, H. (2003). Tribology under refining conditions : initial studies. In 2003 International Mechanical Pulping Conference.. pp. 233--237.  

Berg, J. & Gradin, P. (1995). Effect of Temperature on Fracture of Spruce in Compression Using Acoustic Emissions. In AECM-5, Fifth International Symposium on Acoustic Emission From Composite Material. Columbus, OH, USA : . pp. 139--148.

Manuscripts

Isaksson, P. , Gradin, P. A. & Kulachenko, A. Acoustic Emission applied to mechanically loaded Paper ??.

Norgren, S. , Gradin, P. , Höglund, H. & Isaksson, P. Acoustic emission monitoring to evaluate the z-direction and in-plane strength properties of TMP reject fraction.

Persson, J. , Isaksson, P. & Gradin, P. Dynamic mode I crack growth in a notched foam specimen under quasi static loading.

Svensson, B. , Holmgren, S. , Höglund, H. , Gradin, P. & Lundberg, B. High Strain Rate Compression of Spruce Wood in a Saturated Steam Environment.

Gradin, P. & Backlund, H. New sensors for measurement of tangential force distribution in mill-scale TMP chip refiners.

Reports

Kulachenko, A. , Gradin, P. A. & Uesaka, T. (2006). Basic mechanisms of fluting formation and retention in paper. Sundsvall : Mittuniversitetet, FSCN (Rapportserie FSCN 2006:36). (FSCN-rapport R-06-65).  

Gradin, P. A. (2004). Acoustic emission monitoring during mechanical-loading of paper : State of the art. Sundsvall : Mitthögskolan, FSCN (Rapportserie FSCN 2004:28). (FSCN-rapport R-04-55).