查询词典 shear modulus

At the phase inversion point,the viscosity of the system at low stress increases slightly and the dynamic rheological parameters (storage modulus,loss modulus and complex viscosity) reach their minimum values.

摘 要 以动态应力流变仪DSR对双酚A型环氧树脂在低乳化剂浓度(2.33wt%)下的相反转乳化过程进行了稳态应力扫描及动态频率扫描实验。

The company worked for research and development of motorcycle gear and automobile gear, and become a lead in manufacture mid modulus gear and small modulus gear.

自公司建立以来就致力于各型摩托车齿轮和汽车齿轮的研发与制造，并逐渐成长为中小模数齿轮生产厂家的领先企业。

The storage modulus is increased with the increase of Cf, while the peak temperature of loss factor and the temperature of loss modulus are not changed with the variation of Cf, which means that the reinforcement of chitin fiber has no effect on the motion of molecular segment for PCL.

动态热机械分析表明，复合材料的储能模量随纤维含量的增加而增加，表征玻璃化转变温度的损耗因子松弛峰的峰值温度和损耗模量的温度都不随纤维含量的改变而变化。

The results showed when the coated PVC fabric scraps were palletized by means of extrusion directly, the strength of the moulded part was weaker than that of the part made from PVC monomer. After the compounding of the fabric scraps with nonwoven PP fabric scraps and waste PE fishnet, the strength and elastic modulus of the composite increased obviously, the toughening effect of the glass fiber was especially noticeable in the form of tensile modulus.

实验结果表明：利用纤维类下脚直接挤出造粒工艺，其注塑成型品的强度要低于PVC单体的强度；通过与PP和PE复合后，复合材料的强度和弹性模量得到显著提高，特别是弹性模量方面显示出了玻璃纤维的增强效果。

The main research tasks and results are as follows:(1) Through comparing the stress intensity factor of compact tension specimen calculated by finite element software with the theoretical value, the feasibility of calculating fracture parameters of crack tip in ABAQUS software was verified.(2) The relationship between the elastic modulus of the material and research scale was studied based on deriving the cohesive stress theory and other relevant theories. And the elastic modulus of the material on meso-scale was determined.(3) Global model and sub-model of the finite element were built in th...e macro-scale, and stress-strain field nearby the crack tip was analyzed, and the results show that the detailed stress-strain in the crack tip could be obtained by using the sub-model technique.(4) In meso-scale, the crack growth model was also established by assuming the crack propagating along the grain boundary, and the detailed stress-strain field in the crack tip was obtained.(5) The effect of crack length on Von Mises stress, and maximum principal stress and strain was analyzed in meso-scale when equivalent KI equals 30MPa.m1/2. And the results show that except for crack tip area, the stress-strain distribution in whole specimen is not affected.

主要完成研究内容和取得成果如下：(1)利用有限元软件计算出紧凑拉伸试样的裂纹尖端应力强度因子KI值，其结果与理论值一致，从而验证了利用ABAQUS计算裂纹尖端相关断裂参量的可行性；(2)在研究内聚应力等相关理论的基础上，推导出了研究尺度与材料弹性模量的近似关系，并确定了介观尺度上的弹性模量；(3)在宏观尺度上建立了全局有限元计算模型和子模型，得到了裂纹尖端应力应变场分布，结果表明利用子模型技术获得比较准确的裂纹尖端应力应变场分布是可行的；(4)在介观尺度上利用平均晶粒尺度的方式建立了裂纹沿晶扩展模型，得到了裂纹尖端断裂过程区的微观应力应变场；(5)当应力强度因子为30MPa.m1/2时，分析了介观尺度上在裂纹沿晶扩展过程中裂纹长度对Mises应力、最大主应力和应变的影响，结果表明，裂纹扩展长度对试样整体应力应变分布影响不大，而对裂纹尖端区域有较大影响；(6)介。。。

The process method of kaolin was introduced using A-151 and ester titanate coupling agent. Effect of dosage of A-151 and ester titanate coupling agent on stretch strength and modulus, bending strength and modulus , impact strength of UPR was investigated.

介绍了用A - 15 1与钛酸酯偶联剂处理高岭土的方法，研究了处理剂的用量与偶联高岭土的加入量对UPR的拉伸强度和模量、弯曲强度和模量以及冲击强度的影响。

When the elastic modulus is high, stress and strain are mainly concentrated at edge of the overlap region, while those in weld spot zone are relatively even; when the elastic modulus is low, stresses in the adhesive layer are small while stresses are concentrated to a certain extent at edge of the weld spot.

分析发现，胶粘剂弹性模量对接头中应力应变分布的趋势有明显影响，胶粘剂弹性模量高时，搭接区边缘附近区域应力应变高，焊点区应力应变值相对较小；弹性模量低时，焊点边缘处存在一定的应力集中，胶层中应力较小。

Its main mechanism of action is that XLGB could enhance the biomechanics response accommodate function of macrostructure os integumentale, increase femoral diameter, aggrandize area of the bone cortex, augment torsional section modulus and rectangular section modulus, and enhance the density of bone mineral substance in ovariectomized rats.

仙灵骨葆能够提高股骨宏观结构的生物力学应答调节功能，使股骨干外径增粗，皮质骨面积增加，骨丢失减少使股骨结构的抗弯、抗扭截面模数增大，使骨的力学结构优化，骨强度提高。

Single factor experiments were done with the factors including the width of protrusion and the trolley's velocity, which showed that the surface frictional coefficient decreases with the width of protrusion increasing, and doesn't change with the trolley's velocity changing, which was consistent with the results of the orthogonal experiment. A theoretical model of the horizontal projection of a corrugated bionic surface's contact area was built, which showed that the contact area's horizontal projection decreases with width and interval increasing respectively and that the ratio of the contact area's horizontal projection and the vertical load decreases with the vertical load increasing. It indicated that the surface frictional coefficient decreases with the above three factors increasing respectively. Finite element modeling and analysis of interactions of a plate and soils was done using ANSYS, which showed that the plate frictional coefficient is little relative to soil elastic modulus and decreases with vertical surface pressure and that trolley's pull and vertical displacement of bionic surface's control pilot keep constant almost during the plate being pulled. Finite element modeling and analysis of interactions of a corrugated bionic surface and soils was done using ANSYS, which showed that surface frictional coefficient is little relative to soil elastic modulus and decreases with bionic surface's structural parameters and vertical pressure increasing. However, the three factors all didn't affect the surface frictional coefficient remarkably on the condition of 90% dependability. For the first time, bionic surfaces were applied to screw piles, which formed bionic screw piles, and the contrast experiments showed the bionic screw pile had certain resistance-decreasing effects.

建立了波纹型仿生曲面与土壤的接触面积的水平投影的理论模型，表明接触面积的水平投影A随着波纹型仿生曲面突起宽度、两相邻突起间距的增大而减小，接触面积的水平投影与波纹型仿生曲面表面垂直载荷之比随着波纹型仿生曲面表面垂直载荷的增大而减小，进而得出仿生曲面摩擦系数随着波纹型仿生曲面突起宽度、两相邻突起间距以及表面垂直载荷的增大而减小；利用ANSYS软件对平板与土壤的相互作用进行了有限元建模与分析，表明平板摩擦系数与土壤弹性模量关系不大，而随着表面垂直载荷的增大而减小；平板牵引过程中台车牵引力和仿生曲面控制节点垂直方向位移基本保持不变；利用ANSYS软件对波纹型仿生曲面与土壤的相互作用进行了有限元建模与分析，表明波纹型仿生曲面系数在一定范围内基本不受土壤弹性模量的影响，随着波纹型仿生曲面突起宽度、两相邻突起间距以及表面垂直载荷的增大而减小，但在可信度为90％的前提下，三个因素影响都不显著；首次将波纹型仿生曲面应用于与土壤作用方式以挤压为主的螺旋桩，形成仿生螺旋桩，并与普通螺旋桩进行了沉桩对比试验，表明波纹型仿生曲面应用于螺旋桩桩体表面具有明显的降阻作用。

Due to different properties of the signal and noise in wave-let coefficient modulus under different scale of wavelet transformation, we can extract the edge characteristic through detecting the local maximum of the wavelet transformation coefficient modulus.

基于信号与噪声在不同尺度下小波系数模的变化特征，可以通过检测小波变换系数模局部极大值来提取图像的边缘特征。

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。