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Comparison of bounding surface model and traditional elastic mechanics model of concrete

模型中采用了基于应变能量释放率空间的边界面模型，通过极限断裂面的不断移动模拟疲劳过程中损伤阈值的不断变化。

Based on a bounding surface model of the concrete and elastic-plasticity constitutive relationship of steel, this paper establishes the finite element model of the self-stressing concrete filled steel tube short column under axial load and eccentric load. the mechanical performances are analyzed.

对本课题组共进行的37根轴压短柱的试验结果分析，采用分解分析的方法，回归出钢管自应力免振混凝土轴压结构核心混凝土的等效单轴本构关系，与传统的弹性、塑性、断裂、损伤等力学模型相比具有简单实用的特点，便于进行工程计算。

Damage function is introduced in elastic and plastic modulus expression of the bounding surface formulation directly; then a bounding surface damage model for structural soft soil is developed; the complication induced by introducing damage parameter into the bounding surface equation is avoided and its numerical implementation is easy for the analysis of earth structures.

在边界面理论的弹塑性模量中直接引入损伤函数，建立结构性软土的边界面损伤模型，避免了在边界面方程中引入损伤变量带来的复杂性，易于在土工数值分析时采用。

Based on the plasto-elastic bounding surface model, the dynamic characters of typical clay and silt were studied through several types of laboratory dynamic tests. The parameters of dynamic bounding surface model were given upon the tests. By using a nonlinear procedure for response analysis of horizontally layered sites subjected to multi-directional earthquake loading, the response of acceleration, pore pressure and dynamic stress in Shanghai area under different earthquakes were studied.

在弹塑性边界面模型的基础上，通过试验，研究了上海地区典型粘土和砂性土的动力特性，取得了针对边界面模型的计算参数，并采用多向地震作用下的水平地层弹塑性动力反应分析程序对以深厚软土覆盖地层为特点的上海地区典型的土层断面，以苏南核电站为主的地震输入进行了场地反应分析，在加速度特性、孔压特性和动应力特性等方面取得了相应的结果。

A novel method of measuring the elastic characteristics of a C-type Bourdon tube, based on COD imaging and image-processing technologies, is presented and demonstrated.

提出了一种基于OCD成像和计算机图像处理技术的C型簧管弹性特性测量新方法。

In addition, the variation trends of the longitudinal elastic modulus with the braiding parameters agree with the results in the literature.

此外，确定的纵向弹性模量随编织参数的变化规律与文献中的结果一致。

Unlike Breen, we decompose the deformation of textile into elastic de formation, bend and shear, and deduce simple energy functions of the three kinds of deformation in accordance with the principles of strength of materials.

采用与布的物理结构相似的粒子网格作为布的模型，在此基础上，将布受到外力作用时的形变归纳为弹性伸缩、弯曲和剪切3类，并推导出相应的能量函数来描述这3种形变。

For the elastic in my britches!

才能得到我裤子里的橡筋！

Company main products, there are in addition to domestic famous "Snow grams" brand series: PVC coating, PU Laminated, 300T more than nylon, polyester cloth and High Fiber down outside the compound fabric; there are all kinds of cotton, chemical fiber and blended for raw materials casual, shirts, tencel, and elastic products; a series of "N / C, C / N, T / C, COTTON" plastic scraper, such as multi-functional, senior washed and composite fabrics, imitation buckskin fabric and long-term and The United States cooperation in the production of DuPont's "Teflon" and other multi-functional family of fabrics.

公司主要产品，有除享誉国内的"雪克"牌系列：PVC涂层、PU贴合、300T以上尼龙、涤纶羽绒布及高级化纤复合布外；还有各种纯棉、化纤以及混纺为原材料的休闲、衬衣、天丝、及弹力产品；有一系列的"N/C、C/N、T/C、COTTON"等多功能刮胶、高级水洗及复合面料、仿鹿皮面料，并长期与美国杜邦公司合作生产的"特氟隆"等多功能系列面料。

PVA WHEEL BUFF is PVA fibrous elastic abrasive made by the spinning technology developed by us and bonded with PVA and other resins.

PVA Wheel Buff抛光轮是由NTK独家研发的特殊纺织技术，以PVA及其它树脂所组成的纤维状弹性研磨工具。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐