查询词典 Poisson's ratio

Steel fiber ; high-strength concrete ; elastic modulus ; poisson's ratio

钢纤维；高强混凝土；弹性模量；泊松比

In this study, a novel crisscross-shaped micro test structure to characterize the Poisson's ratio of thin film materials is proposed.

中文摘要本论文提出一创新十字形（Crisscross-shaped）微结构，用於量测薄膜材料之卜松比。

Taking into account the effect of material nonlinear constitutive relation and the variation of Poisson's ratio under loading, the finite element models for axially loaded combined section columns were proposed.

由于管材和核心材料在受力过程中的相互作用，即管材对核心材料的约束作用，使核心材料的强度得以提高，塑性和韧性性能大为改善。

The research results show that there is a good positive correlativity between dynamic modulus of elasticity and the longitudinal or transverse wave velocity, but there is no such positive correlativity between dynamic Poisson's ratio of the rocks and its longitudinal or transverse wave velocity.

研究结果表明，煤系岩石的动弹性模量与岩石的纵波或横波速度具有很好的正相关关系，而与泊松比不具有这种正相关关系。

It is shown that the abruptness of the displacement or deformation at a certain characteristic location and the connectedness of plastic zone are not depended on the values of elastic modulus and Poisson's ratio.

对比计算表明，弹性模量E与泊松比v的不同取值对边坡濒临破坏时特征点位移的突变性和塑性区的贯通性基本没有影响，因而对边坡安全系数的准确确定没有影响。

The conclusions are that the mode II dynamic stress intensity factor increase with the shear relaxation parameter of viscoelastic materials increasing, with swelling relaxation parameter decreasing, and with shear module and Poisson's ratio of elastic materials increasing.

得到Ⅱ型动应力强度因子随着粘弹性材料的剪切松弛参量的增加而增大，膨胀松弛参量的增加而减小；随着弹性材料的剪切模量和泊松比的增加而增大。

The results show that the major contribution to DOS of Mg and Pb are the 2p orbit of Mg and the 5d orbit of Pb, followed by the 3s orbit of Mg and the 6p orbit of Pb, the 6s orbit of Pb is the smallest one. There are a large number of charges around Mg, it has the characteristics of typical metal bond. Mg and Pb share some charges to form covalent bond, but the distortion of the charge at the junction is little; the proportion of covalent bond is less than the metal bond, Mg2Pb is semimetal. The elastic modulus and shear modulus of Mg2Pb are 68.6 and 27.9 GPa, respectively. Based on Pugh empirical criterions and Poisson's ratio, Mg2Pb is brittle in nature.

结果表明：Mg和Pb对态密度的贡献主要是Mg的2p轨道和Pb的5d轨道，其次为Mg的3s轨道和Pb的6p轨道，Pb的6s轨道贡献最小；在Mg原子周围有大量的电荷存在，呈典型的金属键特征，Mg、Pb之间存在共用的电荷，有较强的离域性，以共价键形式存在，但交界电荷的畸变不大，故共价键所占比例较少，金属键所占比例较大，Mg2Pb化合物呈半金属性；Mg2Pb的弹性模量和切变模量分别为68.6和27.9 GPa，Pugh经验判据和泊松比均表明Mg2Pb具有脆性。

of comparing practical case evaluation with gas testing result is that the gas- bearing layer in VU Area can be identified by cross-plot of Poisson's ratio and compressional slowness, cross-plot of tangential stress and compressional slowness, as well as negative anomaly of tangential stress.

通过实例评价结果与试气结果的对比认为在YU地区，泊松比与纵波时差交会，切向应力与纵波时差交会，以及切向应力的负异常，均能较好地识别气层。

The experimental results are summarized as follows: the tensile strengh and bending strengh of steel fiber reinforced lightweight aggregate concrete can be improved significantly by the addition of steel fiber; to some extent ,the addition of steel fiber can also increase the compressive strength ,although little , it radically improves the compressive toughness , and the steel fiber reinforced lightweight aggregate concrete will not fall apart with cracks; with the increase of the volume fraction of steel fiber, the elastic modulus is also rising somewhat; Poisson's ratio is influenced little with the addition of the steel fiber and the effect regularity displays unconspicuously.

本文试验研究结果可归纳如下：钢纤维的加入能明显提高钢纤维轻骨料混凝土的抗拉强度和抗折强度；掺入钢纤维使钢纤维轻骨料混凝土的抗压强度有一定程度的提高，增长幅度不大，但抗压韧性却有很大改善，使钢纤维轻骨料混凝土裂而不散；钢纤维轻骨料混凝土的弹性模量随钢纤维体积率的增大有一定提高；泊松比受钢纤维的加入影响不大，规律性不明显。

The basic parameters of cement are elastic modulus, poisson's ratio and the thickness of cement;they do have impact on the coefficient of pressure transmission of surrounding rock and the coefficient of inflation pressure transmission of casing

水泥环的基本参数弹性模量、泊松比和厚度对围压压力传递系数和套管压力传递系数都有影响

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。