包含織構系數的任意應力狀態(tài)下六角晶粒正交板材屈服函數理論研究
發(fā)布時間:2019-03-17 15:05
【摘要】:工程上往往采用Hosford屈服函數來描述正交金屬板材屈服和塑性變形行為。但它要求板材的3個主應力必須與板材的正交軸同軸。針對這一的缺點,通過引入方向函數,分析方向函數與織構系數的關系,給出包含織構系數的任意應力狀態(tài)下六角晶粒正交板材屈服函數。此屈服函數包含5個材料常數和5個織構系數,比Hosford屈服函數更具有一般性。利用新屈服函數推導了不同角度下金屬板材各向異性指數r值和屈服應力與織構系數的表達式,實驗證明新屈服函數對描述材料的塑性變形及屈服強度的擬合較好,為分析金屬板材的力學性能提供了依據。
[Abstract]:In engineering, Hosford yield function is often used to describe the yield and plastic deformation behavior of orthogonal metal sheet. However, it requires that the three principal stresses of the plate must be coaxial with the orthogonal axis of the plate. In view of this shortcoming, by introducing the direction function, the relationship between the direction function and the texture coefficient is analyzed, and the yield function of hexagonal grain orthogonal plate under arbitrary stress state with texture coefficient is given. The yield function consists of five material constants and five texture coefficients, which is more general than the Hosford yield function. The expressions of anisotropy index r, yield stress and texture coefficient of sheet metal at different angles are derived by using the new yield function. The results show that the new yield function is a good fit for describing the plastic deformation and yield strength of the material. It provides a basis for the analysis of the mechanical properties of metal sheet.
【作者單位】: 南昌大學工程力學實驗中心;東華理工大學建筑工程學院;東華理工大學核工程與地球物理學院;
【基金】:江西省自然科學基金資助項目(20161BAB216142,20171BAB202028) 江西省教育廳科學技術研究項目(GJJ150575) 核技術應用教育部工程研究中心開放基金項目(HJSJYB2016-9)
【分類號】:TG146.23
本文編號:2442415
[Abstract]:In engineering, Hosford yield function is often used to describe the yield and plastic deformation behavior of orthogonal metal sheet. However, it requires that the three principal stresses of the plate must be coaxial with the orthogonal axis of the plate. In view of this shortcoming, by introducing the direction function, the relationship between the direction function and the texture coefficient is analyzed, and the yield function of hexagonal grain orthogonal plate under arbitrary stress state with texture coefficient is given. The yield function consists of five material constants and five texture coefficients, which is more general than the Hosford yield function. The expressions of anisotropy index r, yield stress and texture coefficient of sheet metal at different angles are derived by using the new yield function. The results show that the new yield function is a good fit for describing the plastic deformation and yield strength of the material. It provides a basis for the analysis of the mechanical properties of metal sheet.
【作者單位】: 南昌大學工程力學實驗中心;東華理工大學建筑工程學院;東華理工大學核工程與地球物理學院;
【基金】:江西省自然科學基金資助項目(20161BAB216142,20171BAB202028) 江西省教育廳科學技術研究項目(GJJ150575) 核技術應用教育部工程研究中心開放基金項目(HJSJYB2016-9)
【分類號】:TG146.23
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