破坏应力

In connection with the application of concrete-filled steel tubular column in the engineering practice in this country at present,a new fashioned connection in framed structure of concrete-filled square steel tubular column with reinforced concrete beam was proposed,being a connection of concrete beam with non-through hidden steel corbel steel tubular column filled with concrete.

结合我国现行钢管混凝土柱在实际工程中的应用状况，提出了用于方钢管混凝土柱-钢筋混凝土梁框架结构的新型连接节点形式非穿心暗钢牛腿方钢管混凝土柱与混凝土梁节点，采用了X型加载试验方案，制作了1∶3的试验模型，进行了低周反复荷载作用下的试验研究，得到了相关的钢筋应力应变发展规律和相应的滞回曲线，通过对试验结果节点破坏的机理分析，提出了进一步的改进措施。

The origin、 development and present state of the container ship2. The deformation characters and collapse mode of the container ship3. The basic theory of thin-walled structural mechanics: The bending of the thin-walled beam; The unconstrained torsion of the thin-walled member bar; The constrained torsion of the thin-walled member bar with opening; The constrained of the thin-walled member bar with closed port.4. The calculation of the warp stress in the container ship based on the thin-walled structural mechanics theoryModeling of the hull ladder calculation based on referred mechanics theories of thin-walled member bar, calculation of crankle character of the each section, such as sectional coordinates、 Free twist shear flow、 secondary shear flow、 bend shear flow and so on.

本文主要包括下述六个方面的内容： 1 集装箱船的起源、发展和现状 2 集装箱船变形特征和破坏形式 3 薄壁结构力学的基本理论◇薄壁梁的弯曲；◇薄壁杆件的自由扭转；◇开口薄壁杆件的约束扭转；◇闭口薄壁杆件的约束扭转 4 利用薄壁结构力学理论计算集装箱船的翘曲应力建立船体阶梯计算模型，利用薄壁杆件力学中相关理论，求解各断面单元的弯扭特性，包括：扇性坐标、自由扭转剪流、二次剪流、弯曲剪流等。

The analysis of these curves leads to a conclusion that the material damage at rupture is monotonically decreasing function of applied stress .

对这些曲线的分析导致结论：材料破坏时的损伤是所加应力的递减函数。

The experimental results indicated that the specimen had a large deformation when the ratio of consolidation stress and frequency were larger and the relative density was smaller.

试验结果表明，当固结应力比、频率较大，而相对密度较小时，试样有较大的变形，更容易发生破坏。

The experimental result indicates that the sample has a large deformation when the parameters of ratio of consolidation stress, frequency are higher and the sample has a small deformation when the parameter of density is higher.

试验结果表明，当固结应力比、频率较大，而相对密度较小时，试样有较大的变形，更容易发生破坏。

And, the DEM displacement and FEM stress analysis are two common methods of computer simulation.

在边坡变形破坏的计算机模拟已有的方法中，应用比较普遍的是有限元应力分析和离散元位移分析。

To study the different permeability characteristics of rock, transient permeability tests of limestone and diorite were carried out. The permeability evolution and the relation between pore pressure and time of rock specimens during the complete stress-strain course were investigated. The strain-permeability equations of rock specimens during the deformation and failure course were set up. Finally, the penetration mechanism of two types of rocks was analyzed.

为研究岩石不同渗透特性，对石灰岩和闪长岩进行了瞬态渗透实验，研究了岩样全应力－应变过程中的渗透率演化规律以及孔隙压差与时间的关系，并建立了岩样变形破坏过程的应变－渗透率方程，最后分析了这两种不同类型岩石渗透机理。

The damage distribution and tensile stress in the damage zone are calculated based on a modified Dugdale model and a damage evolution equation.

基于改进的Dugdale模型和已有的材料损伤率，计算了损伤区内的损伤分布和拉伸应力，讨论了损伤在整体材料破坏过程的作用。

The results show that evaporator failure was a result of typical stress corrosion cracking.

结果表明，该蒸发釜的失效为典型的应力腐蚀破坏。

These models include many constitutive relations of damaged structure and stress transition method, damage evolution equation and respective failure criterion.

模型中包括了损伤结构的多种本构关系及应力转换方法、损伤发展方程与相配套的破坏准则。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。