变截面杆交界面处应力均匀性问题计算机仿真  

Numerical Simulation of Stress Uniformity at the Interface of Variable Cross-section Bar

作　　者：齐敏菊 高光发[2] QI Minju;GAO Guangfa(School of Computer Science,Huainan Normal University,Huainan Anhui,232001,China;School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing Jiangsu,210094,China)

机构地区：[1]淮南师范学院计算机学院,安徽淮南232001 [2]南京理工大学机械工程学院,江苏南京210094

出　　处：《安徽理工大学学报（自然科学版）》2019年第5期32-36,共5页Journal of Anhui University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(11772160,11472008,11202206);“力学”浙江省重中之重学科开放基金资助项目(xklx1513);“十三五”装备预研领域基金资助项目(KFJJ13-9M);中央高校基本科研业务费专项资金资助项目(30915118801)

摘　　要：研究影响变截面杆交界面附近应力场分布的因素与规律对于精细化动态力学性能试验有着一定的理论支撑作用。利用量纲分析理论对影响变截面杆交界面附近区域应力紊乱的影响,分析表明,影响应力紊乱区的主要无量纲因素有面积系数和相对入射强度系数两个。利用ABAQUS软件,对不同无量纲影响系数下的杆中应力波传播与演化开展计算机仿真研究,研究结论显示,无量纲入射波强度对于应力紊乱并没有明显的影响;当面积匹配系数为0.09~0.81区间内的值时,应力紊乱区长度在大杆和小杆中的相对尺寸基本分别在0.70~1.00和0.51~0.60之间。The study of the factors and rules affecting the distribution of stress field near the interface of the bar with variable cross-section provides a certain theoretical support for elaborating dynamic mechanical properties test.Using dimensional analysis theory, the influence on the stress disturbance in the area near the interface of the bar with variable cross-section were analyzed. The analysis shows that the main dimensionless factors affecting the stress disturbance area are area coefficient and relative incident intensity coefficient. Based on the theory of dimensional analysis, a series of simulations were carried out using the software of ABAQUS. The conclusions show that the dimensionless incident stress wave strength has almost no obvious influence on the stress distribution.Furthermore,with the area matching factors varying from 0.03 to 0.81, the relative lengths of the stress disorder zone in bigger cross-sectional part and the smaller part changed from 0.70 to 1.00 and from 0.55 to 0.6, respectively.

关 键 词：计算机仿真 变截面杆 应力波 应力均匀 

分 类 号：O341[理学—固体力学]