ANALYSIS OF ROLLED PIECE DEFORMATION IN STRAIGHTENING PROCESS USING FM-BEM

Authors

Hai-Lian Gui, Heavy Industry Engineering Center of China Ministry of Education, Taiyuan, P.R. China.Material Science & Engineering Science College, Taiyuan University of Science and Technology, Taiyuan, P.R. ChinaFollow
Qiang Li, Technology Center, Taiyuan Heavy Industry CO. LTD., Taiyuan, P.R. China.
Yao Li, Heavy Industry Engineering Center of China Ministry of Education, Taiyuan, P.R. China Mechanical Engineering College, Taiyuan University of Science and Technology, Taiyuan, P.R. China.
Pu Li, Heavy Industry Engineering Center of China Ministry of Education, Taiyuan, P.R. China Mechanical Engineering College, Taiyuan University of Science and Technology, Taiyuan, P.R. China.
Qing-Xue Huang, Heavy Industry Engineering Center of China Ministry of Education, Taiyuan, P.R. China.Material Science & Engineering Science College, Taiyuan University of Science and Technology, Taiyuan, P.R. China

Abstract

Rolled piece deformation in a straightening process is regarded as an inverse problem of the plate bending problem. The straightening force was obtained accurately by applying the fast multipole boundary element method (FM-BEM) to the plate bending problem. Furthermore, the straightening process of a nine-roller straightening roller system with a variable roller distance was simulated using numerical analysis, and a function describing the neutral layer offset was obtained from an analysis of FM-BEM results. In this paper, the principle stress values and neutral layer offset of the microunits in the tension and compression regions are discussed. It is concluded that the neutral layer offset has considerable influence on the straightening force. A neutral layer offset theory that provides a theoretical basis for accurate straightening is presented.

Recommended Citation

Gui, Hai-Lian; Li, Qiang; Li, Yao; Li, Pu; and Huang, Qing-Xue (2014) "ANALYSIS OF ROLLED PIECE DEFORMATION IN STRAIGHTENING PROCESS USING FM-BEM," Journal of Marine Science and Technology: Vol. 22: Iss. 5, Article 3.
DOI: 10.6119/JMST-013-0611-1
Available at: https://jmstt.ntou.edu.tw/journal/vol22/iss5/3