Fiber - reinforced plastic composites - determination of the in - plane shear stress shear strain response , including the in - plane shear modulus and strength , by the plus and minus 45 degree sign tension test method 纤维增强塑料复合材料.用正负45度sign拉伸试验法测定包括平面剪切模数和强度的平面剪切应力剪切变形特性曲线
The effects of piles interval , embankment height , cap width , shear modulus of embankment fill , horizontal geotextile tensile strength and pile - subsoil stiffness ratio on pile efficacy , were also carried out 研究了桩间距、路堤高度、桩顶托板宽度、路堤填土剪切模量、水平加筋体拉伸强度及桩土相对刚度对桩体荷载分担比的影响。
An important issue is that the dry bulk and shear modulus of sandstone are tightly correlated in a simple relationship with distribution of porosity , mineral composition , clay content , cementation , and differential pressure 砂岩的干燥体变模量和剪切模量与孔隙度分布、矿物成分、粘土含量、胶结度和差压的关系是严格相关的,这一点非常重要。
The principle of the ultrasonic method applied to measure elastic coefficient is by measuring the velocity of ultrasonic wave propagation in the solid material to obtain the elastic module , shear modulus and poisson ratio 摘要弹性系数的超声检测,即借助固体弹性常数与超声波波速间的固有关系,通过测量纵波及横波在固体中的传播速度来获取材料的弹性模量、剪切模量及泊松比。
The results show that pile efficacy is significantly affected by piles interval , embankment height , cap size and pile - subsoil stiffness ratio , while shear modulus of embankment fill has less effect and geotextile strength has a little effect 结果表明:桩间距、路堤高度、托板宽度及桩土相对刚度对桩体荷载分担比影响较大,路堤填土剪切模量的影响次之,而水平加筋体拉伸强度的影响很小。
The longitudinal young ' s modulus and the in - plane shear modulus decrease with the increase of the maximum misalignment and the distortion width , but the transverse young ' s modulus and main poisson ' s ratio have no obvious change 研究了不同的最大纤维偏转角和变形区宽度对层合板弹性常数的影响,发现随着和的增加纵向弹性模量和面内剪切模量逐渐降低,横向弹性模量和主泊松比变化不明显。
It is shown that the interfacial crack has a significant effect on the equilibrium position of the edge dislocation near circular interface . the results also exhibit a strong dependency different between the shear modulus and poisson ' s ratios of the matrix and the inclusion 刃型位错与含界面裂纹的夹杂干涉效应表明:当位错接近界面时,裂纹对位错平衡位置有很大的影响;平衡位置对两种材料的弹性性质也有很大依赖性。
Considering the similitude law for shaking table test , we study the test results and obtain some conclusions which are a ) generally , the silty soil in test box liquefies and the liquefied time has relation with the amplitude of acceleration , b ) when the intensity is on and above eight degree , the silty soil deposit will be liquefied dramatically , c ) the relationship of the pore water pressure is relevant to the cycle loading which represents when the cycle loading ranges from little to great , the relationship is represent as a concave curve , or else as a protruding curve and tends to stability . ( 3 ) based on the triaxial compression test and the resonant column test , some studies are made such as a ) the duncan - chang parameters of constitutive model , b ) the dynamic shear modulus ratio and c ) the damping ratio of the site soil deposits . in order to deal with the test data , a computer program is compiled ( 2 )利用小型振动台进行了k _ 0固结状态下粉土的振动液化模拟研究,通过分析正弦荷载作用下的试验资料,验证了粉土的孔隙水压力增长模式的合理性;从微分方程推导了基于土体振动台模型试验的相似律,并从模型实体、孔压时程曲线和相似律等方面做出了分析,得出了如下结论:在小型振动台试验中,模型箱中的粉土都发生了液化,液化的时刻和输入加速度幅值有关,而对频率的变化不太敏感;粉土在相当于8 9度地震烈度的加速度幅值作用下可能产生严重的液化;孔压的增长曲线形状与施加的荷载有关:当施加荷载为由小到大的形式时,曲线形状为上凹的曲线;当施加荷载为等幅的正弦荷载或荷载幅值由大到小时,曲线形状为上凸的曲线,且逐渐趋于稳定。
The young ' s modulus , shear modulus and bending strength of single crystal silicon are characterized by the balance approach , too . a simplified relative uncertainty transfer equation is obtained by introducing the appropriate non - dimensional factor into the expression , thus providing more convenience to the practical evaluation of the resultant uncertainty 理论上引入适当的无量纲因子,简化函数的表达,给出了天平法测量杨氏模量和剪切模量相对误差传递函数的解析表达式,并在此基础上讨论了天平法测量杨氏模量和剪切模量中相应误差的影响。
The main dynamic parameter of the subsoil is the dynamic shear modulus . base on the data of the experiments , analyzing the relationship between the dynamic shear modulus and the characteristic parameters such as the density , the water content and the shear distortion , the expression of the dynamic shear modulus of the subsoil is picked out 地基土的主要动力参数为土的动剪切模量,而利用实验所得的数据,分析动剪切模量g与地基土的干密度(孔隙比) 、含水量以及地基土的剪切变形等参数之间的关系,就可以得到地基土的动剪切模量的表达式。