张清东, 卢兴福, 张晓峰, 戴杰涛, 秦剑. 冷轧薄宽带钢局部型中浪瓢曲变形行为研究[J]. 工程力学, 2013, 30(11): 298-303. DOI: 10.6052/j.issn.1000-4750.2012.08.0563
引用本文: 张清东, 卢兴福, 张晓峰, 戴杰涛, 秦剑. 冷轧薄宽带钢局部型中浪瓢曲变形行为研究[J]. 工程力学, 2013, 30(11): 298-303. DOI: 10.6052/j.issn.1000-4750.2012.08.0563

冷轧薄宽带钢局部型中浪瓢曲变形行为研究

  • 摘要: 针对薄宽带钢冷轧过程中易发多发的局部型中浪瓢曲缺陷,引入非均匀载荷宽度、弹性约束系数及平均张应力建立了屈曲变形的解析计算模型。应用能量最低原理对屈曲变形区域进行搜索求解,得到了局部型中浪屈曲临界条件(包括临界应力、屈曲波长和屈曲波宽),获得了其与非均匀载荷宽度、弹性约束系数、平均张应力的关系,并发现平均张应力是产生局部型中浪的重要影响因素。应用样条有限元方法对局部型中浪进行数值仿真分析,验证了屈曲解析计算方法的正确性。在实验轧机上进行了轧制研究,通过轧制获得了局部型中浪屈曲模态,对实验结果分析得到了相对应的屈曲临界条件,与解析法和样条有限元法结果基本吻合,证明了样条有限元计算方法与解析计算方法的正确性及其工程应用价值。

     

    Abstract: The analytical calculation model of local central buckling deformation is established in which the width of non-uniform load, elastic restrained coefficient and average tension are introduced. Based on the lowest energy principle, the buckling critical stress, buckling wavelength, and buckling wave width are obtained by searching the buckling region. Then the relationships among buckling critical conditions, the width of non-uniform load, elastic restrained coefficient and average tension are also obtained. It is found that the average tension is a important factor to produce local central buckling. The analytical method is verified by spline finite element method simulation. The rolling experiment is carried out in test mill, and the local central buckling is obtained. The critical conditions are achieved, which are in good agreement with the analytical results and numerical results. The correctness and engineering value of the analytical method and spline finite method are proved.

     

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