金属棒材拉丝应力统一解  

UNIFIED SOLUTION FOR STRESSES OF METAL BAR IN WIRE DRAWING PRODUCTION PROCESS

作　　者：李小伟[1,2,3] 赵均海[2,3] 

机构地区：[1]攀枝花学院土木工程学院,攀枝花617000 [2]长安大学建筑工程学院,西安710061 [3]西部建筑科技国家重点实验室,西安710054

出　　处：《工程力学》2010年第9期221-226,共6页Engineering Mechanics

基　　金：陕西省自然科学基金项目(SJ08E204);教育部博士点基金项目(20040710001)

摘　　要：材料拉压强度不相等时棒材拉丝问题的应力解答是研究材料成形工艺人员所关心的问题。根据统一强度理论,分析了棒材拉丝问题,得到考虑材料拉压比影响的棒材拉丝应力统一解和最大截面缩减率统一解。分析过程中引入一个反映棒材拉制和压制工艺的系数,将棒材拉丝问题的拉制解和压制解统一起来。当材料拉压强度相同时,棒材拉丝应力的Mises解答是棒材拉丝应力统一解的特例。在拉丝过程中,棒材拉丝问题的最大截面缩减率随材料拉压比变化而变化。当材料的拉压强度相等时,棒材拉丝最大截面缩减率的Mises解答是最大截面缩减率统一解的特例,也是它的最大值。To gain the solutions for stresses of a bar in a wire drawing process and for the maximum shrinkage ratio of the cross-section of a metal bar with different tension compression strength, the problem of wire drawing is analyzed based on Unified Strength Theory. The influence of the tension compression ratio is taken into consideration. As a result, gained are unified solutions for bar stresses under the wire drawing process and for the maximum shrinkage ratio of the cross-section of the metal bar. In the wire drawing process, the drawing and compression solutions of the metal bar are related by a coefficient, which can differentiate the solution of the drawing process from that of compression. When the tension and compression strength of a material are equal, the Mises result is just a special case of the unified solution of metal wire drawing. The maximum shrinkage ratio of the cross-section of the metal bar is affected by the tension compression ratio of the material in wire drawing process. When the tension strength of a material is equal to its compression strength, the Mises result of the maximum shrinkage ratio of the cross-section of the metal bar is a special case of its unified solution, and also its maximum value.

关 键 词：机械工程 统一解 统一强度理论 拉丝 棒材 

分 类 号：O346.5[理学—固体力学]