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瞬时弹性
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  instantaneous elastic
     An Instantaneous Elastic Constitutive Relation for Nonlinear Viscoelastic Materials
     非线性粘弹性材料的一个瞬时弹性本构关系
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     An Instantaneous Elastic Constitutive Relation for Nonlinear Viscoelastic Materials
     非线性粘弹性材料的一个瞬时弹性本构关系
短句来源
     In this paper, a simple instantaneous elastic constitutive relation for nonlinear viscoelastic materials is obtained by using the elasticity recovery correspondence principle in nonlinear viscoelastic constitutive theory.
     运用非线性粘弹性本构理论中的弹性回复对应原理 ,得到了一个简单的适用于非线性粘弹性材料的瞬时弹性本构关系 .
短句来源
     By using the simplified constitutive relations and the elasticity recovery correspondence principle, through the quasi-static experiments of modified polypropylene, a new approach for finding the instantaneous elastic stress-strain relation is proposed.
     采用简化非线性本构关系和本构关系的弹性回复对应原理 ,通过对改性聚丙烯的准静态实验 ,提出了一种寻求非线性瞬时弹性应力应变关系的新方法 ;
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     The sequence of the relating degree between parameter A and others are B>D>C. The relation between instantaneous elastic and delayed elastic deformation is compact.
     参数A和B、C和D关联度大小依次为B>D>C,该材料的瞬时弹性变形和延迟弹性变形之间联系紧密。
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  instantaneous elasticity
     The results indicate that rheologic model of bitumen which is modified by SBSchanges from Burgers model(model of four elements)to more complicated model of five elements,both the instantaneous elasticity and retarded elasticity evidently increase and the viscosityremarkably decreases.
     结果表明:经 SBS 改性的沥青,其流变模型由 Burgers 模型(四元件模型)转变为更为复杂的五元件模型,其瞬时弹性和推迟弹性均匀明显增大,而粘性显著减少。
短句来源
     Various properties of materials, such as instantaneous elasticity, delayed elasticity, viscous flow and plasticity, etc. , can be described satisfactoriy by this new model theory.
     这种新模型理论可以满意地描述物体的瞬时弹性、延迟弹性、粘性流、塑性等性能 .
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  “瞬时弹性”译为未确定词的双语例句
     but that of mechano-sorptive strain to instantaneous strain was in the large range of fluctuantion which was between 8.73 and 45.34;
     而机械吸附应变与瞬时弹性应变的比值波动较大,最大机械吸附应变与对应时刻的瞬时弹性应变比值为8.73~45.34;
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     The results showed when the alternating loads were 80% and 60% of the damaging loads, the fracture curves of fatigue/creep had three stages, namely, transient elastic deformation stage, delayed elastic deformation stage and accelerated fracture stage;
     结果表明,在交变载荷为破坏载荷的80%和60%时,其疲劳/蠕变断裂曲线为三段式曲线,即瞬时弹性变形阶段、延迟弹性变形阶段和加速断裂阶段;
短句来源
     The ratio of viscoelastic strain to instantaneous strain of all layers was 2.49;
     各层粘弹性应变与瞬时弹性应变比值近似为常数2.49;
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     Assessment of biliary fibrosis by transient elastography in patients with PBC and PSC
     应用瞬时弹性图评估PBC和PSC患者的胆管纤维化程度
短句来源
     This model considered the instant elastic deformation and nonlinear creeping.
     该模型考虑了瞬时弹性变形及其蠕变的非线性特性。
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  instantaneous elastic
The instantaneous elastic modulus could be related to the internal cell pressure, and gelatinization of starch and viscoelastic units appeared to reflect the viscoelastic properties of pectic sustances and hemicelluloses, respectively.
      
The instantaneous elastic modulus could be associated with internal cell pressure.
      
The average low-frequency stiffness values (Klow) derived from the stiffness impulse responses at each sample in time are believed to reflect primarily the instantaneous elastic properties of active crossbridges.
      
The strain rate of a variety of materials under constant stress after an instantaneous elastic response is found to be well described by a general relaxation law:
      
It was found that for typically 20 percent of the lifetime, the instantaneous elastic-plastic strains and, more importantly, primary creep determine the deformation response.
      
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  instantaneous elasticity
Instantaneous elasticity, retarded elasticity and plastic flow can be calculated.
      
The extent of instantaneous elasticity of plastic fat products was found to be dependent on loading time.
      
At longer loading times, the instantaneous elasticity as a percentage of total deformation decreased, with a corresponding increase in permanent deformation.
      
The origin of the instantaneous elasticity in single frog muscle fibres
      
F(1), related to the instantaneous elasticity, was 272 ± 42 mN (n=12) while, Cf was 0.0894 ± 0.0026 [Ln(s)]-1 (n=12).
      
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In this Paper,the important problems of temperature stresses in arch dams are analyzed. Firstly,we consider the transient elastic three dimensional temperature stresses.It is pro- posed to cut the dam into horizontal and vertical systems,compute the stresses and dis- placements arisen therein by the nonlinear temperature distribution on the assumption of Plane section of Bernoulli-Navier,then adjust the displacements of the horizontal and ve- rtical systems by the so called trial load method.Some tables are...

In this Paper,the important problems of temperature stresses in arch dams are analyzed. Firstly,we consider the transient elastic three dimensional temperature stresses.It is pro- posed to cut the dam into horizontal and vertical systems,compute the stresses and dis- placements arisen therein by the nonlinear temperature distribution on the assumption of Plane section of Bernoulli-Navier,then adjust the displacements of the horizontal and ve- rtical systems by the so called trial load method.Some tables are prepared to simplify the calculation.A simple method is suggested to calculate stresses in thick archs.The method of equivalent hydraustatical pressure for temperature variations in arch dams is discussed. The defects of this method are pointed out. Secondly,the influence of creep of concrete is considered.For mature concrete the creep C(t,τ)may be expressed by the following formula: C(t,τ)=C_[1-e-r(t-τ)](49) Where Co and r are constants determined by tests,τ is the time at which the load is applied,and t is the time considered.Then for the sinusoidal temperature stresses,σ= F(x,y,z)sin t,the coefficient k of stress relaxation may be computed by k=sinθ-E_C_r·(g sinθ-ωcosθ)/g~2+ω~2(59) θ=tan~(-1)[(g~2+ω~2)/(E_C_rω)-g/ω](58) Where k=(max.elastic temp.stress)/(max.Visco-elastic temp.stress), E_0=Young's modulus of concrete,θ=time lag of max.str,g=r(1+E_0C_0).As shown in the second example,for concrete of portlant cement,k=0.417 for annual temperature variations,k=0.993 for 15 days Variations,k=1.00 for daily Variations,the stress-time curves are shown in Fig.10.Cofficient k is independent of x,y,z. Thirdly,the problem of subcooling is considered.The stresses caused by subcooling at the time of grouting contraction joints are also reduced by creep of concrete at later time. The final coefficient k of stress relaxation may be computed by k=1/(1+E_0C_0)(65) As shown in the third example,k=0.357 for concrete of portlant cement.

本文对拱坝温度应力的几个主要问题进行了研究。全文分为三部分,第一部分研究拱坝瞬时弹性温度应力的计算问题,建议把伯努里-纳维埃关于断面在变形后保持为平面的假定与试荷载法相结合来解决拱坝温度应力的空间问题,并提供了计算公式和图表,以便利计算。对厚拱坝的应力分析提出了一个简捷的近似处理方法。对温度折算成静水压力计算的方法进行了评述,指出了它的缺点。第二部分研究混凝土徐变对拱坝温度应力的影响,我们引用马斯洛夫教授关于混凝土徐变的积分方程来分析外界温度按简谐变化时的温度应力问题,得到了一个方便的计算公式。第三部分研究拱坝灌缝时的过度冷却对降低温度应力的效果问题,也建议了一个计算方法。

On the basis of Gurtin's variattional principles, a three-dimensional finite element scheme in both space and fime for transient elastodynamic problems has been formulated. A computer program for this finite element algorithm is being developed for both temporal and spatial dependence.

根据Gurtin的变分原理,提出了在空间域和时间域解瞬时弹性动力学问题的一种三维有限元素算法。关于这种既适用于时间域,也适用于空间域的有限元素算法的计算机程序,正在设计之中。

The paper deals with the creep properties of cemented filling in South Mine of Xi Kuang Shan. After a general review of the prevailing theories on creep, the proceduce and conditions of the experiment are briefly described. The resultant data have been processed and analyzed both by graphical and fitting methods. The creep property of the cemented filling under uni-axial compression is manifested and the empirical formulae of its instantaneous elastic modulus and specific creep are then worked out.

本文论述锡矿山南矿胶结充填混凝土的徐变特性。文中简要介绍了目前沿用的徐变基本理论和本试验工作的研究方法及条件,分别用图解法和拟合法对试验结果进行了整理和分析,阐明了该种混凝土在单轴压缩荷载作用下的徐变特性,得出了其瞬时弹性模量及徐变度的经验公式。

 
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