| 轴力和交变弯矩作用下双对称梁的弹塑性状态 |
| |
| 引用本文： | 姚艳萍,陆明万,张雄.轴力和交变弯矩作用下双对称梁的弹塑性状态[J].清华大学学报(自然科学版),2002,42(4):450-454. |
| |
| 作者姓名： | 姚艳萍 陆明万 张雄 |
| |
| 作者单位： | 清华大学工程力学系,北京,100084 |
| |
| 基金项目： | 核工业科学基金资助项目 ( Y7197EY5 0 6) |
| |
| 摘 要： | 塑性变形对管系的动力响应有重要影响。研究了承受恒定轴力和交变弯矩作用的梁的弹塑性状态 ,对具有两个正交对称轴的任意截面形状梁 ,给出了确定纯弹性、安定、低周疲劳、棘轮、坍塌破坏等各种弹塑性状态之间分界线的基本方程 ,得到了圆形、圆管形及矩形 3种截面的载荷分区图。通过载荷分区图可以直接判断在交变载荷下梁、管部件的弹塑性响应 ,对理解动力载荷下管系的塑性失效机理及能量耗散对管系动力响应的影响具有重要意义
|
| 关 键 词： | 梁 管系 安定 棘轮 载荷分区图 |
| 文章编号： | 1000-0054(2002)04-0450-05 |
| 修稿时间： | 2001年4月11日 |
Inelastic behavior of bi-symmetric beams with steady axial force and cyclic bending loads |
| |
| YAO Yanping,LU Mingwan,ZHANG Xiong.Inelastic behavior of bi-symmetric beams with steady axial force and cyclic bending loads[J].Journal of Tsinghua University(Science and Technology),2002,42(4):450-454. |
| |
| Authors: | YAO Yanping LU Mingwan ZHANG Xiong |
| |
| Abstract: | Plastic deformation has significant influence on the dynamic response of piping systems. The inelastic behavior of beams subjected to a steady axial force and a cyclic bending moment was studied to determine the boundaries between various behaviors, such as pure elastic, shakedown, plastic fatigue, ratcheting and collapse. These equations are adaptable to beams of any shape cross section with two orthogonal symmetric axes. Load regime diagrams are obtained for beams with circular, tubular and rectangular cross sections. The behavior of beams and tubes with cyclic loading can be determined from the load regime diagrams. The results can be used to understand the failure mechanism of piping systems with dynamic loading and the influence of energy dissipation on the dynamic response of piping systems. |
| |
| Keywords: | beam piping systems shakedown ratcheting load regime diagram |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
