锻压技术

不同压弯量对无缝钢管斜辊矫直残余应力分布的影响

英文标题：Influence of different reductions on residual stress distribution of skew roller straightening for seamless steel pipe

作者：李艳辉宋华苗露

单位：辽宁科技大学

关键词：无缝钢管斜辊冷矫直弹塑性有限元轴向残余应力环向残余应力

分类号：

出版年,卷(期):页码：2015,40(4):64-68

摘要：

从研究2-2-2型无缝钢管斜辊矫直机矫直过程入手，基于大变形弹塑性有限元法，应用ANSYS/LS-DYNA软件建立了Ф88 mm×10 mm×2500 mm 无缝钢管斜辊冷矫直的数值模型。通过模拟计算分析不同压弯量对钢管矫直后残余应力分布状况的影响，并与X-Ray衍射结果对比。模拟结果表明：矫直后钢管轴向、环向残余应力的峰值均随压下量的增大而增大；钢管轴向残余应力内表面为压应力，外表面为拉应力；环向残余应力从内至外逐渐由压应力变为拉应力，且越靠近内、外表面残余应力值越大。模拟实验结果与真实结果吻合。

Starting from studying the straightening process of seamless steel pipe 2-2-2 by skew roller straightener， and based on large deformation elastic-plastic finite element method, numerical model of skew roller cold straightening for Ф88 mm×10 mm×2500 mm seamless steel pipe was established by using ANSYS/LS-DYNA software. Through the simulation analysis, the influence on different reductions of residual stress distribution of seamless steel pipe after straightening was obtained, which was compared with XRD results. The simulation results show that axial and hoop residual peak stresses of seamless steel pipe increase with the increasing of reduction amount; the axial residual stress on the inner surface of seamless steel pipe is compressive stress, while that on the outer surface is tensile stress; the hoop residual stress changes gradually from compressive stress to tensile stress along the thickness direction from inside surface to outside surface, and the closer it is to inner or outer surface，the bigger the residual stress is. In conclusion, simulation results and practical results are consistent.

基金项目：

辽宁科技大学青年教师科研基金资助项目（20140038）

李艳辉（1979-），女，硕士，助教

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