力学

The stress distribution on the wall of directional well is analysed, and a borehole stability model for the formation with dip angle in directional well is established. The influences of dip angle and trend on borehole stability are discussed.

建立了弱面地层数学模型，分析了斜井井壁岩石应力状态，推导出了井壁岩石最大主应力与低强度地层法向夹角的计算公式，建立了用于大倾角地层钻井液密度安全下限的力学模型，详细分析了倾斜地层的倾角和走向对井壁稳定性的影响。

Besides,the relation also becomes steep as inclination angle of shear band increases.

尺寸效应除了影响准脆性材料的断裂力学参数及最大荷载值外

With the changing of the parameter of interface mechanical property, R, the evident difference can be seen from curves of incident angle vs coefficients of reflection or transmission.

当层合板中弱界面的力学性能参数不同时，以入射角为变量所得到的透射系数和反射系数曲线呈现出明显差异。

As applications, the 2nd elastic moduli are used to explain the effect of chiral angle on asymmetry behavior of torsion, and finite deformation problems of single-walled carbon nanotubes are successfully simulated by the thin shell model.

作为应用：利用面内的2阶模量解释了纳米管螺旋角相关的力学行为：扭转不对称现象。利用薄壳模型成功模拟了单壁纳米管的大变形弹性失稳行为。

A mechanic model of a thin tube p asted with an actuator, is presented, the mixed deformations of compr ession and torsion of the tube are analyzed and the relation between the angle o f twist of the tube and temperature in a temperature cycle is given.

建立了粘有SMA丝应变驱动器的薄壁圆管的力学模型，分析了一个温度循环中，薄壁圆管受SMA驱动发生的压扭复合变形，给出了薄壁圆管扭转角与激励温度之间的关系。

The shape of a coarse aggregrate can be fully expressed in terms of the independent properties: form, angularity and flat index.

基于沥青混合料数字图象处理技术而开发的处理软件是分析沥青混合料内部结构，研究沥青混合料宏观力学性能的有效手段。

The research showed that the modif ied anhydrite changed from polarity to nonpolarity.

研究了硬脂酸改性硬石膏的效果和机理，测试了改性硬石膏应用于型材的力学性能。

The structure of rock is extremely complicated discontinuous and heterogeneous body, its mechanics property has non-linear, anisotropism and rheology characteristic, which changed over time.

岩石的结构是极其复杂的非连续和非均质体，其力学属性具有非线性、各向异性及随时间变化的流变特性。

For the anisotropism problem in the viscoplastic constitutive model, a four-step anisotropic tensor is generally used to describe it, but there are some difficulties to determine the tensor's components.

为此，本文引用传统塑性力学中各向异性当量屈服应力的概念，在现有Walker模型的基础上得到了一个更加便于工程应用的正交各向异性粘塑性损伤统一本构方程。

The effect of extrusion and anneal on mechanical properties and damping capacity of Mg-0.6Zr alloy was studied.

研究了挤压及退火对Mg-0.6Zr系合金力学性能及阻尼行为的影响。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐