| 1. | Characteristically, the strains in the plactic region are much greater than in the elastic region .
很明显，塑性阶段的应变远大于弹性阶段的应变。 |
| 2. | After the inelastic phase , the distributing of plastic hinges is proper and reasonable , and the requirement of ductility design of structure is satisfied
进入塑性阶段后，塑性铰分布合理，满足了结构延性设计的要求。 |
| 3. | The ratio of the diameter of nozzle to the diameter of vessel has greater effect on the distribution area of high stress in plastic deformation stage
对于均处于塑性阶段的结构而言，开孔率的大小对高应力区的分布范围影响较大。 |
| 4. | During elastic - plastic stage , the wall was equaled to a rigid frame - oblique compression bar model . during failure stage , the wall was equaled to a beam - hinged frame
弹性阶段一一复合材料等效弹性板模型;弹塑性阶段，一捆lj架斜压杆模型;破坏阶段一一梁铰框架模型。 |
| 5. | When the element studied lost the stability during the elastic - plastic period , the stability balance equation turn to the special coefficient differential equation , and the analytic value cannot be got
当所研究构件是在弹塑性阶段失稳时，稳定平衡微分方程变成非常系数微分方程，而无法求得其解析解。 |
| 6. | When the element studied lost the stability during the elastic - plastic period , the stability balance equation turn to the special coefficient differential equation , and the analytic value cannot be got
当所研究构件是在弹塑性阶段失稳时，稳定平衡微分方程变为了非常系数微分方程，而无法求得真解析解。 |
| 7. | Solid65 element in ansys software was used to analyze and simulate these beams , a comparative agreement between theory and experiment on elastic stage was found . but more researches need further to make on plastic stage
此外，用ansys有限元软件的solid65单元进行数值仿真，计算结果同试验结果进行比较，发现弹性阶段两者吻合得比较好，但在塑性阶段还有待于进一步开展研究。 |
| 8. | Roll over protective structure ( rops ) is a device which installs on out of construction vehicle . the main functions are : when the vehicle rolling over . rops can prevent the vehicle from rolling over further , and reduce the possibility of rolling vehicle injures operator ; when the vehicle traveling on freezing soil . concrete and rock , it has large resist continuous impact ability ; when the vehicle overturning rops can support the whole vehicle . arrangement of falling object protective structure ( fops ) can block objects ( such as trees , rocks ) so that supply protection for operator . this problem is that research rolling over and falling objects protective structure of bulldozer by learning research condition of rops / fops and relative lay down international standard . on the base of theory analysis . detrudes counting formula of rops / fops deformation through founding mechanics analysis model of rops / fops at the stage of elasticity and plastoelastic . and finds a set of feasible nonlinear finite element analysis counting . lt calculates rops / fops plastoelastic deforma variable of 320hp bulldozer , bulldozer has been carried out by optimizing design method
其主要功能是：当车辆滚翻时， rops能刺入未冻土壤而阻止车辆的进一步滚翻，降低滚翻的车辆对系着安全带司机轧伤的可能性；保证rops在碰撞和冲击变形不大的地面(如冻土、混疑土上、岩石)时，能具有相当大的抗连续冲击能力；当车辆已经处于颠覆状态时，已经变形的rops应能支撑住整车。落物保护装置(简称fops ) ，其构件的布置方式要能遮蔽坠落的物体(如，树木、岩石等) ，以便对司机提供适当的保护。本课题主要通过了解国内外有关对rops fops的研究情况和有关国际标准的制定，对大型推土机倾翻和落物保护装置进行研究，在理论分析的基础上，通过建立rops fops的力学分析模型，推导弹性、弹塑性阶段rops fops变形的计算公式，建立一套可行的rops fops的非线性有限元分析计算方法。 |
| 9. | The wall was equaled to an elastic composite slab with silica bricks as main body and concrete rib beams , columns and outer frame as reinforcing fiber . ( 2 ) elastic - plastic stage . the wall was equaled to a rigid frame - oblique compression bar model in which concrete frame was equivalent to a rigid frame while silica brick was equivalent to a oblique compression bar
( 1 )弹性阶段? ?将墙体视为一种以轻质砌块为基体，混凝土肋梁、肋柱、外框为增强纤维的复合材料等效弹性板； ( 2 )弹塑性阶段? ?将墙体视为一个由钢筋混凝土刚架和与之铰接的砌块等效斜压杆组成的刚架斜压杆组合模型； ( 3 )破坏阶段? ?将墙体视为肋梁严重破损的梁铰框架模型。 |
| 10. | After the analysis results are checked against the experimental results and , it is founded that a satisfactory agreement is obtained in elastic phase and a discontented agreement is gained in plastic phase since the influence of residual stress , degradation of cross - sectional stiffness and the spread of plastic zone length cannot be taken into account in plastic hinges theory
程序计算结果与试验值相比，弹性阶段吻合得较好，塑性阶段由于塑性铰法无法考虑残余应力、刚度硬化以及塑性区长度的发武汉理工大学博士学位论文展等因素，因此与试验值相比误差偏大。 |
