弹性力学

On the basis of Chen's equation of finite deformation mechanics with a dragging coordinator system,the paper studied the meaning of elastic parameters and constitutive equation in the medium equivalent to classic infinitesimal deformation mechanics that cracked,large deformation formation corresponds to and relevant features of seismic velocity.

基于陈至达的拖带坐标系的变形力学方程，研究了大变形破裂地层对应的经典无限小变形力学的等效介质弹性参数的含义、物性方程和相应的地震反射波的速度特性。

The tensile strength and the elastic modulus were assumed to obey Weibull and logarithmic normal distribution and the other mechanical parameters were taken as constant values in the simulations of three-graded-concrete supported beam. The random aggregate random parameters model was established, which is very close to the actual structure. The results show that the nonlinear behavior of higher homogeneous specimen appears later obviously; the influence of random distribution of elastic modulus on the mechanical character is very little in linear range, while great in nonlinear range; random distribution of tensile strength affects the strength and the damage threshold of concrete obviously.

对三级配混凝土简支梁进行数值模拟时，假定各相材料的抗拉强度和弹性模量服从Weibull、对数正态两种随机分布，其他力学参数取定值，生成和实际结构比较接近的随机骨料随机参数模型，数值模拟结果表明材料均质度较高的试件出现非线性行为的时间要明显滞后于均质度较低的试件；弹性模量分布的随机性对材料线弹性段力学性能的影响极小，而对非线性区域的影响较大；材料强度分布的随机性对混凝土的强度和损伤阈值有较大的影响。

Based on the biomechanical characteristics of memory alloy and determination of atlantoaxial data, a neotype shape memory alloy cervical hook was designed to treat

本科充分利用记忆合金的形状记忆效应和力学特性，通过对国人寰枢椎数据测定，自行设计了一种符合寰枢椎解剖学及生物力学特征的弹性颈椎夹钩。

The constitution, the classification and the physical performance of membranematerials are expounded in this dissertation. Through test, an analysis is made of thefour basic mechanical properties of membrane materials including the nonlinearity,the nonelasticity, the orthotropy and the viscoelasticity.

本文对建筑膜材料的构成与分类以及建筑物理性能进行了系统阐述，并通过试验研究重点分析了建筑膜材料非线性、非弹性、各向异性以及粘弹性四大基本力学特性。

It is because of the mechanical behavior that the counter bearing pressure at the driving side of a mixing drum driven by a large-scale rubber tyre is not even and excessive ,which brings the elastic distortion to the tyre.

大型橡胶轮胎传动的圆筒混合机由于力学行为造成传动侧支反力不均且过大，使轮胎发生弹性变形，增大了弹性阻力矩，使电流波动过大，减速机经常磨损、胶合，导致轮胎磨损严重而停产。

In this paper Laplace transforms is utilized in viscoelastic theory of polymers making the relations between various viscoelastic functions like relaxation modulus , creep compliance and functiqns representing dynamic behavior simple and clear, relaxation spectrum and retardation spectrum are defined in terms of Laplace transform to correlate all viscoelastic functions.

将拉普拉斯变换应用于聚合物粘弹性理论，使粘弹性材料的特性函数如松弛模量、蠕变柔量以及表示动态力学性能的函数之间的关系简单明了，并用拉氏变换定义松弛谱和推迟谱，将各粘弹函数相互联系起来。

The effect of bimoment and ratio of slenderness is considered in thegeometrical stiffness matrix.

根据线弹性统一分析力学模型，提出了相应的几何非线性分析力学模型，导出了考虑杆件双力矩贡献的几何刚度矩阵，并在几何刚度矩阵中引入了杆件长细比的影响项。

It is well known that elastic deformations are characterized by complete recovery to the undeformed configuration upon removal of the applied loads.

塑性力学是固体力学的重要分支之一，着重于论述与非弹性不可逆变形相关的基本概念和原理，在结构非线性变形分析，压力加工等工程技术中有着广泛的应用。

By the analysis of wave mechanics of typical percussive drilling system of rock, characteristic parameter a, which describes wave dynamics and structure of the percussive drill system, has been presented.

通过对冲击凿岩典型系统的波动力学分析，提出了反映冲击凿岩机具波动力学和结构特征的参数α，继而确定冲击凿岩机具的动力学特征参数α和运动学特征参数τ，实现了活塞弹性动力学与刚体运动学的融合，为冲击凿岩机具的概念设计提供了较完整的方法。

A new type of shape memory alloy damper was proposed by utilizing both the high damping and recentring features of superelastic SMA wire.

利用奥氏体SMA丝的超弹性和阻尼特性，设计了一种新型的SMA阻尼器，试验研究了该阻尼器在循环荷载作用下的力学性能，建立了基于塑性理论的一维理论模型，并对其力学性能进行了数值模拟。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。