查询词典 shear modulus

In 1959 Sauerbrey developed an empirical equation to describe the mass sensitivity of gas phase mass deposition on a piezoelectric quartz crystal——Sauerbrey equation:ΔF=〓=-CΔm, where ΔF is measured frequency shift, in Hz; F〓 is the fundamental resonant frequency, in Hz;Δm is mass change, in g; A is piezoelectrically active area , in cm〓;μ〓 is shear modulus of quartz, 2. 947×10〓g· cm〓;ρ〓 is density of quartz, 2. 648g·cm〓; C is mass sensitivity constant , in 〓.

1959年，Sauerbrey最先提出了将压电晶体谐振器用作定量测量质量的装置，并从理论上导出了频率与质量变化之间的关系式——Sauerbrey方程：ΔF=〓=-。。。

On the basis of former studies, the effects of seismic stress history on the small strain shear modulus G_ of Fujian sands and Qiantangjiang silts with different relative density under one-way and two-way dynamic is inverstigated.

本文在前人研究基础上，对多向振动下不同相对密度的福建标准砂与钱塘江粉土开展地震应力历史对小应变剪切模量影响的研究。

That is using the dynamic torsional shear apparatus, the tests of dynamic strength, dynamic modulus and damping ratio of Yangling unsaturated intact loess are carried out by using torsional cyclic load triaxial apparatus under different moisture condition, and the pore water pressure and pore air pressure of unsaturated intact loess are measured in testing process, as well as the obvious regularity are acquired from the study results.

将该方法应用于对杨凌非饱和黄土在不同湿度条件下进行了动强度及动模量和阻尼比试验，试验过程中实现了对非饱和黄土的孔隙水压力和孔隙气压力的动态测量，试验结果取得了比较明显的规律性。

The shear modulus and mass density of FUMs are assumed to be of exponential form and the Poisson's ratio is assumed to be constant.

假设裂纹突然受到均匀载荷作用，材料的剪切模量和密度为指数形式模型，泊松比为常数。

The results indicate that the μ of the asphalt mixtures has significant effect on the maximal lateral and shear strains. When the modulus ratio of the top and middle lagers is less than 0.8 and the μ of the asphalt top layer increases to a certain extent, the asphalt mixtures around the edge of wheel mark tend to flow towards both sides of the rut under the action of load, leading to the unstable rut.

结果表明，沥青面层的泊松比对沥青路面结构的最大横向应变和最大剪应变有显著影响：当上中面层模量比小于0.8且沥青面层泊松比增大到一定程度时，轮迹带边缘的沥青混合料在荷载作用下有向车辙两侧流动的趋势，容易产生失稳性车辙。

Three composites of the different fibers with epoxy resin matrix are prepared and the corresponding unilateral fiber reinforced winding ring specimens are fabricated. The mechanical poperties of the composites including tensile strength, modulus and three point interlaminar shear strength are te...

对由PBO纤维与环氧树脂基体复合成型的单向纤维增强环形试样，测试了其拉伸强度、弹性模量和层间剪切强度，结果表明：PBO纤维股纱的拉伸强度比F - 12和Kevlar - 4 9分别高 2 4 4 %和 5 2 8%以上，单向纤维复合材料的拉伸强度分别高约 37 2 %和 92 8%，耐热性也高约 166℃，但PBO纤维与环氧树脂基体的界面粘结性很差，层间剪切强度仅为 2 3～ 2 7MPa 。

Three composites of the different fibers with epoxy resin matrix are prepared and the corresponding unilateral fiber reinforced winding ring specimens are fabricated. The mechanical poperties of the composites including tensile strength, modulus and three point interlaminar shear strength are tested.

据文献 [2 ]介绍，PBO(聚对亚苯基苯并双口恶唑)是含杂环的苯氮聚合物的一种，它是采用二氨基间苯二酚和对苯二甲酸在多磷酸中聚合、采用空气间隙湿法纺丝法进行纺丝而制得的。

In this paper,the problem of a mode Ⅲ crack in a functionally graded strip is studied with the assumption that the reciprocals of the shear modulus is a linear function in the thickness direction,while the Possion s ratio is kept constant.

作者假设功能梯度材料剪切模量的倒数为坐标的线性函数，而泊松比为常量，研究功能梯度板条的反平面裂纹问题。

The shear modulus and damp ratio characteristics of typical strata are achieved in the dynamic test, based on GDS triaxial dynamic system.

利用GDS三轴仪对工程场地内的原状土样进行了室内动力试验，获得了各主要土层的动弹性模量与阻尼比。

The shear modulus values of 47 metallic glasses at absolute zero temperature[G(0)] and at glass transition temperatures were calculated.

3对47种金属玻璃在绝对零度时的剪切模量G(0)和在玻璃转变温度时的剪切模量G进行计算。

Must have Coordination and negotiation skill, flexible ideas, and be punctilious person.

必须具备较好的协调与谈判能力，头脑灵活，工作认真仔细

Result: 18 patients are all with simple eye.The pigment mole lies in nasal and temple sides of the ball conjunctiva,in which 2 lie in lacrimal caruncle and semilunar plica.

结果：18例患者均为单眼，色素痣大多数位于内外侧睑裂部球结膜面，2例位于泪阜及半月皱襞，经激光治疗后，10例色素痣消失，有5例行再次激光后消失，2例行第三次激光后消失，1例第四次激光后消失。