查询词典 compressive stress

Methods A 3-D finite element model of the wrist based on CT scan images was established. The load transmission of carpus and the distribution of contact stress on radiocarpal joint under axial compressive force on metacarpals as well as the effect of transverse carpal ligament release on the displacement of carpal bones were computed and analyzed.

通过CT扫描图像数据对腕部进行三维有限元建模，计算并分析掌骨受轴向压力作用下正常腕部载荷传递及接触应力的分布，以及腕横韧带切开前后腕骨运动的变化情况。

Under triaxial compressive conditions, with an increase of loading, the propagation and sliding of microcracks in rocklike materials become increasingly intense and lead to a serial of consequences, such as nonlinear stress-strain relationships, deterioration of elastic modulus, anisotropic deformation, volumetric dilatancy and irreversible plastic strain, etc..

三维压缩条件下，随着载荷的逐渐增加，岩石类材料内部微裂纹的传播与错动不断加剧，最终导致非线性应力－应变关系、弹性模量的减小、变形的各向异性、体积膨胀以及不可逆塑性变形等结果。

Firstly, by analyzing existing models of predicting concrete carbonation and its influencing factors, a practical model of predicting the depth of carbonated concrete is proposed in this thesis, which takes the compressive strength of concrete as the main parameter and considers influence of temperature and moisture of environment, construction factors, stress condition and density of CO2 in the environment, and plenty of spot-data has been used to verify the model; By means of regression analysis of the spot-data, the calculating model of uncarbonated remainder is formulated; Considering the randomness of concrete carbonation, the paper put forward a probability analysis method of concrete carbonation span-life.

首先，论文在分析已有混凝土碳化预测模型与影响因素的基础上，建立了以混凝土抗压强度为参数，考虑环境温湿度，施工因素，应力状态及环境CO_2浓度影响的混凝土碳化深度实用模型，并利用大量工程实测数据对模型进行了验证；通过对实际工程检测数据的回归分析，给出了碳化残量的计算公式；考虑到混凝土碳化的随机性，提出了混凝土碳化寿命的概率分析方法。

In contrast, the compressive plateau stress of the foams is less sensitive to the imperfections.

研究结果表明，微结构的屈曲是泡沫材料在压缩过程中起主要作用的变形机理。

They are FF testing methods, surface treatment technique, evaluation of the properties of surface modification layer, coating induced embrittlement, selection of coating materials, effects of SP and other surface modification on fretting fatigue resistance . A new coating technology combined with shot peening is proved in improving FFR of titanium alloy. The relation between fretting wear and fretting fatigue mechanism of titanium alloy are discussed on the basis of the experimental results. The main contributions are as follows:(1) Shot peening is the most efficient way in improving fretting fatigue resistance of titanium alloys. Working hardening, roughening and compressive residual stress are involved in the shot peened surface.

本文针对上述问题，从影响FF行为的关键环节：FF实验方法、表面处理工艺技术及表层性能评价、镀层引起的钛合金脆化行为、脆化机制及镀层材料的选择、喷丸强化因数和表面涂层对钛合金FF抗力的影响、FF与微动磨损的联系等，深入系统地研究影响钛合金FF抗力的控制因数，探讨FF机理，并通过喷丸形变强化与新型表面镀或渗层合理复合，达到进一步提高钛合金FF抗力的目的。

In view of the differences in material property and fracture mode, the mechanism of using diamond polish to bore in component is studied, and a special diamond core boring bit is developed. The technological equipment can exert compressive pre-stress on drilling area and surrounding material.

针对构件组成材料的性能特点和破坏方式，研究了金刚石磨料对构件进行套料钻孔的机理，研制特定的钻孔工具和工艺装置，对构件钻削区及其周围材料施加预压应力。

The stress in tower type of derrick is smaller than the other types of derricks under the combined action of compressive and torsional loads.

与仅受压载荷相比，井架承受压扭联合载荷时，弦杆应力稍有增加，而非弦杆应力有较大的增加。

The compressive pressure, in comparing to the sheas stress, the later, as a kind of physiological like s tress, has less effect on the cellular shape and cytoskeleton of osteoblasts.

静压力作为一种类似于生理状态的外力与剪切力相比，对成骨细胞的形态及细胞骨架影响较轻。

The thickness of the work piece decreased with distance from the centre because of the higher compressive plastic stress state in the centre region compared to the outer part during the loading stage and the elastic recovery during unloading.

工作片断的厚度在中心区域减少了以从中心的距离由于更高的压缩塑料重音状态与外部在装货阶段期间和有弹性补救比较在卸载期间。

The compressive residual stress of stainless steel substrate increased with increasing the thickness of Zr film.

不锈钢基材的压缩残留应力随著薄膜厚度的增加而有增加的趋势。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。