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| 1 | Elastic-plastic behavior of a semicircular frame being pressed against a rigid plane显示文摘作为一个简化结构的模型,一个半圆形的框架被用来学习一个飞机机身的防撞性行为。伪静电干扰在它对僵硬地面被压的过程的一个半圆形的框架的大有弹性的塑料变丑被分析。首先基于线性有弹性的假设,伪静电干扰框架的大变丑接触法能被划分成三个阶段,即,点接触,线接触和 buckling 以后。借助于一个射击方法,在象在三个阶段的弯曲矩的分发一样的排水量和接触力量之间的关系被获得。由为半圆形的框架假定一种有弹性的、完美地塑料的时刻弯曲关系,然后,接触法详细被分析揭示塑料倒塌机制,塑料绞链和力量排水量关系旅行。以便验证分析,一个初步的实验被进行,在哪个有夹钳的结束的半戒指的二种类型被一个僵硬盘子压。另外,数字模拟被采用 ABAQUS 分析矩形的代表性的横梁和 I 型标也进行。最后,理论预言与试验性的结果和数字答案相比,证明有弹性的塑料分析能预言接触法很好。 | X.W.Zhang J.L.Yang T.X.Yu | 2008 | Acta Mechanica Sinica2008，24，4： | 2 |
| 2 | Complete Solution of Large Plastic Deformation of Square Plates Under Exponentially Decaying Pulse Loading显示文摘The rigid-plastic assumption has greatly simplified the theoretical analysis of dynamic plastic response of structures.Within this framework,a common tool is the modal technique using approximate independent yield criteria,which leads to upper-and lower-bound solutions,but usually with poor accuracy.In this paper,by utilizing the membrane factor method(MFM),the large-deflection dynamic plastic response of square plates subjected to exponentially decaying pulse loading is analyzed by taking both the transient response phase and the exact yield criterion into account.Based on the combination of saturation analysis(SA)and MFM,the complete solutions and regressive formulae of saturated deflection and saturated impulse are obtained.As the dynamic behavior of plates under rectangular pulse loading serves as a benchmark of pulse-equivalent techniques,the large plastic deformation of square plates under short-duration rectangular pulse is also analyzed in detail.Moreover,by comparing the SA results of pulse-loaded square plates with different boundary conditions,it is found that the saturated deflection and saturated impulse of the fully clamped and simply supported square plates both increase linearly with the pulse amplitude,and the slopes are approximately the same,so the conversion between the SA quantities of plates with different boundary conditions can be easily achieved. | Faliang Chen Lanren Tian T.X.Yu Ling Zhu | 2021 | Acta Mechanica Solida Sinica2021，34，6： | 1 |
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