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Holzforschung

International Journal of the Biology, Chemistry, Physics, and Technology of Wood

Editor-in-Chief: Faix, Oskar

Editorial Board Member: Daniel, Geoffrey / Militz, Holger / Rosenau, Thomas / Salmen, Lennart / Sixta, Herbert / Vuorinen, Tapani / Argyropoulos, Dimitris S. / Balakshin, Yu / Barnett, J. R. / Burgert, Ingo / Rio, Jose C. / Evans, Robert / Evtuguin, Dmitry V. / Frazier, Charles E. / Fukushima, Kazuhiko / Gindl-Altmutter, Wolfgang / Glasser, W. G. / Holmbom, Bjarne / Isogai, Akira / Kadla, John F. / Koch, Gerald / Lachenal, Dominique / Laine, Christiane / Mansfield, Shawn D. / Morrell, J.J. / Niemz, Peter / Potthast, Antje / Ragauskas, Arthur J. / Ralph, John / Rice, Robert W. / Salin, Jarl-Gunnar / Schmitt, Uwe / Schultz, Tor P. / Sipilä, Jussi / Takano, Toshiyuki / Tamminen, Tarja / Theliander, Hans / Welling, Johannes / Willför, Stefan / Yoshihara, Hiroshi

12 Issues per year


IMPACT FACTOR 2016: 1.868
5-year IMPACT FACTOR: 1.875

CiteScore 2016: 1.83

SCImago Journal Rank (SJR) 2015: 0.817
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Online
ISSN
1437-434X
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Volume 62, Issue 4 (Jul 2008)

Issues

Profile production in multi-veneer sheets by continuous roll forming

Narayana Srinivasan
  • 1Centre for Advanced Composite Materials, Department of Mechanical Engineering, University of Auckland, Auckland, New Zealand
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Krishnan Jayaraman
  • 2Centre for Advanced Composite Materials, Department of Mechanical Engineering, University of Auckland, Auckland, New Zealand
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Debes Bhattacharyya
  • 3Centre for Advanced Composite Materials, Department of Mechanical Engineering, University of Auckland, Auckland, New Zealand
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2008-02-28 | DOI: https://doi.org/10.1515/HF.2008.064

Abstract

Roll forming is a rapid operation that employs consecutive roll stations to progressively deform a strip into a desired profile. The continuous nature of the process coupled with its versatility and speed makes it extremely attractive for producing lightweight, structurally efficient components from sheet materials. This paper describes the roll forming of plywood by heated rolls, which is an innovative concept that can increase the range of usage and add value to the end products. Deformation length measurements from static roll bend tests were carried out to determine the roll spacing and the results agree well with the values predicted by a modified theory based on the minimisation of the total deformation energy for a rigid-plastic material. The deformation lengths, such as in metals and composite sheets, depend essentially on the geometric parameters of the profiles produced and are practically independent of the mechanical properties of the work material. Further, the real-time strain measurements by strain gauges bonded on the roll formed specimens show that the strain profiles compare reasonably well with those obtained for metallic and continuous fibre-reinforced thermoplastic sheets. Finally, the macroscopic deformation of veneer sheets due to roll forming has been analysed kinematically by means of grid strain analysis and the geometric conformance of the product has been determined.

Keywords: deformation length; geometric conformance; grid strain analysis; plywood; real-time strain profile; roll forming

About the article

Corresponding author. Centre for Advanced Composite Materials, Department of Mechanical Engineering, University of Auckland, Private Bag 92019, Auckland, New Zealand Phone: +64-9-373-7599 ext. 88149 Fax: +64-9-373-7479


Received: 2007-08-31

Accepted: 2008-01-29

Published Online: 2008-02-28

Published Online: 2008-02-28

Published in Print: 2008-07-01


Citation Information: Holzforschung, ISSN (Online) 1437-434X, ISSN (Print) 0018-3830, DOI: https://doi.org/10.1515/HF.2008.064.

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[2]
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Wood Material Science and Engineering, 2013, Volume 8, Number 3, Page 198
[3]
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S. Rao, K. Jayaraman, and D. Bhattacharyya
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