拉深比對304不銹鋼圓筒件殘余應力的影響
發(fā)布時間:2018-12-20 15:26
【摘要】:304不銹鋼圓筒拉深件在其口部易發(fā)生縱向開裂,外壁殘余拉應力過大是造成其縱向開裂的根本原因之一.本文結(jié)合有限元法分析不同拉深比所得圓筒拉深件的殘余應力,用納米壓痕試驗研究了拉深比對304不銹鋼圓筒拉深件筒壁殘余應力的影響.結(jié)果表明:304不銹鋼圓筒拉深件外壁的殘余拉應力從筒底到口部先增大后減小,最大殘余應力出現(xiàn)在筒壁中部約60%筒壁高度處;納米壓痕測得拉深比為1.43、1.54、1.67和1.82拉深圓筒件筒壁的最大殘余應力分別為391.87、745.30、793.74和1 013.1 MPa;最大殘余應力隨拉深比的增大而增大.與其他文獻對比分析,此研究結(jié)果是正確可靠的.
[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.
【作者單位】: 湘潭大學機械工程學院;
【基金】:國家自然科學基金資助項目(51175445)
【分類號】: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.
【作者單位】: 湘潭大學機械工程學院;
【基金】:國家自然科學基金資助項目(51175445)
【分類號】:TG386.3
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