塑性变形率对辊式矫直板材的影响 - Journal of Northeastern University.PDF

第30 卷第5期 东 北 大 学 学 报 ( 自 然 科 学 版 ) Vol130, No. 5 2 00 9 年 5 月 Journal of Northeastern U ni ersity( Natural Science) M ay 2 0 0 9 薛军安, 崔 丽, 胡贤磊, 刘相华 ( , 110004) : , , . , , . , , ( 80% ) , . : ; ; ; ; : T G 333. 23 : A : 1005-3026( 2009) 05-0681-04 Effect of Plastic Deformation Rate on Plate Steel During Roller Leveling X UE Jun-an, CUI L i, H U X ian-lei, LI U X iang-h ua ( State Key Laboratory of Rolling Automation, Northeastern Uni ersit y, Shenyang 110004, China. Correspondent: XUE Jun-an, E-mail: xuejunan @ 163. com) Abstract: T o in estigate the deformation beha ior of plate steel during roller le eling in depth, the cur ature integration by elastic-plastic differences w as introduced to simulate and analyze the effect of plastic deformation rate on the le eling results. A method of dispersion calculation was proposed for plastic deformation rate, thus getting the relationships between the plastic deformation rate, residual cur ature and a erage residual stress for different combinations of reduction schedule under conditions of single- alued initial cur ature. The plastic deformation rate cannot be justified theoretically that it is the only criterion for le eling results. How e er, because the initial cur ature is ery hard to determine on line, the plastic deformation rate has to come up to about 80% after roller le eling. In addition, the optimized le eling conditions are pointed out for the single- alued initial cur ature. Key words: plastic deformation rate; roller le eling; numerical simulation; residual cur ature; residual stress ,