拉深比对304不锈钢圆筒件残余应力的影响
发布时间：2018-12-20 15:26
【摘要】：304不锈钢圆筒拉深件在其口部易发生纵向开裂,外壁残余拉应力过大是造成其纵向开裂的根本原因之一.本文结合有限元法分析不同拉深比所得圆筒拉深件的残余应力,用纳米压痕试验研究了拉深比对304不锈钢圆筒拉深件筒壁残余应力的影响.结果表明:304不锈钢圆筒拉深件外壁的残余拉应力从筒底到口部先增大后减小,最大残余应力出现在筒壁中部约60%筒壁高度处;纳米压痕测得拉深比为1.43、1.54、1.67和1.82拉深圆筒件筒壁的最大残余应力分别为391.87、745.30、793.74和1 013.1 MPa;最大残余应力随拉深比的增大而增大.与其他文献对比分析,此研究结果是正确可靠的.
[Abstract]:304 stainless steel cylinder drawing parts are prone to longitudinal cracking at the mouth, and the excessive residual tensile stress on the outer wall is one of the fundamental reasons for the longitudinal cracking. In this paper, the residual stress of cylinder drawing with different drawing ratios is analyzed with finite element method. The influence of drawing ratio on the residual stress of 304 stainless steel cylinder drawing is studied by nano-indentation test. The results show that the residual tensile stress of the outer wall of 304 stainless steel cylinder is increased first from the bottom to the mouth of the cylinder and then decreased, and the maximum residual stress appears at the height of 60% of the wall in the middle of the cylinder wall. The maximum residual stress of the cylinder wall measured by nano-indentation is 391.87745.30793.74 and 1 013.1 MPa;, respectively. The maximum residual stress of the cylinder wall is 391.87745.30793.74 and 1 013.1 MPa;, respectively. Compared with other literatures, the results of this study are correct and reliable.
【作者单位】： 湘潭大学机械工程学院;
【基金】：国家自然科学基金资助项目(51175445)
【分类号】：TG386.3
[Abstract]:304 stainless steel cylinder drawing parts are prone to longitudinal cracking at the mouth, and the excessive residual tensile stress on the outer wall is one of the fundamental reasons for the longitudinal cracking. In this paper, the residual stress of cylinder drawing with different drawing ratios is analyzed with finite element method. The influence of drawing ratio on the residual stress of 304 stainless steel cylinder drawing is studied by nano-indentation test. The results show that the residual tensile stress of the outer wall of 304 stainless steel cylinder is increased first from the bottom to the mouth of the cylinder and then decreased, and the maximum residual stress appears at the height of 60% of the wall in the middle of the cylinder wall. The maximum residual stress of the cylinder wall measured by nano-indentation is 391.87745.30793.74 and 1 013.1 MPa;, respectively. The maximum residual stress of the cylinder wall is 391.87745.30793.74 and 1 013.1 MPa;, respectively. Compared with other literatures, the results of this study are correct and reliable.
【作者单位】： 湘潭大学机械工程学院;
【基金】：国家自然科学基金资助项目(51175445)
【分类号】：TG386.3
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