力学

The effects of normalizing temperature and retaining time on microstructure and properties of low chromium wear resistant cast steel were studied.

采用金相、扫描电镜和力学性能分析方法研究了正火温度和保温时间对低铬耐磨铸铁组织与力学性能的影响。

For different materials,the macrostructure of damage sites are dissimilar.The microstructure of damage sites were indicated as follows:the damages of granite and marble after being particle impacted were made up of damage of cleavage surfaces and crystal faces and spread of cracks along phase interface and pore space,which is harmful to mechanical property;while the damages of concrete and mortar were made up of cracks of transition zone and aggregates and plastic flow of C-S-H,which may cause more hidden danger to perma nence than to mechanical properties.

对四种材料损伤形貌的微观分析表明：花岗岩、大理石受颗粒冲击后产生的损伤主要为拉应力导致的解理面、晶面的破坏以及裂纹沿相界面和孔隙的扩展，对其力学性能有较大的危害；混凝土和砂浆的损伤由过渡区开裂、骨料破裂和C-S-H的塑性滑移共同构成，对耐久性造成的隐患远大于对力学性能的影响。

Based on the results of exploration and in-site test of typical waste dump in southwest mountainous area,the analysis theory and method of waste dump rainfall infiltration are discussed beginning at analysing coal waste's mechanics characteristic and seepage theoty. Fllowed estimating method of waste dump stability is discussed influenced by rainfall. At last a typical engineering example of coal waste dump landslide influenced by rainfall is researched, acquiring research fruit hereinafter.①Particular exploration of typical waste dump in chongqing area and analysis estimate to its area engineering geology are done. Granule gradation、water content、nature density、dry densit etc parameter of waste granular media are tested. The mechanics characteristic of waste are researched by in-site shear experimentation、compressibility experimentation and infiltration experimentation.②The coal waste dumping is different from other consecutive solid material as incompact granule structure. Its shear strength and transforming characteristic also have itself characteristic.

本文针对山区矸石山，结合踏勘和现场试验，从分析矸石散体的力学特性以及渗流理论出发，研究了矸石山降雨入渗的分析理论与方法，在此基础上提出了矸石山体降雨作用下的稳定性评价方法，最后进行了降雨作用下典型矸石山滑坡工程实例研究，取得了以下研究成果：①对重庆山区中梁山、万盛、荣昌、天府、綦江等矿区代表性的矸石山进行详细踏勘，对矸石山的堆放形态及其区域的工程水文地质情况进行调查；针对重庆山区矸石山，测试矸石散体的颗粒级配、含水量、天然密度、干密度等参数、并在此基础上，通过现场剪切、压缩、渗透试验等研究矸石散体的力学特征。

Secondly, most of the constitutive relations of SMA, which have been established before, are so complex that they cannot be used to calculate in the design of SMA springs. In this paper, it puts forward to an easier mechanical constitutive relation of SMA spring, which is fit for designing. Its applicability has been proved by the experiment which includes SMA spring compression and uninstall.

其次针对以往从机理分析建立的形状记忆合金力学本构模型过于复杂、不适合工程设计计算的缺点，建立了简单的SMA弹簧的力学本构模型，通过对形状记忆压簧的压缩、卸载试验，来验证了这个模型的适用性，并与其它文献的实验结果相比较，二者结论基本一致。

The plastic deformation mechanism of the process is explained. The vector equations of the curved conical surface and the figure of the particle motion for the forming process of the bending tube are presented. The theoretical model of stress and strain fields of the forming process is deduced. The practical forming process of tubes of large diameter demonstrates the validity of the new type of design method of the ox-horned core bar and the computation formula of the length of the raw tube.

本文通过研究弯管成形瞬时应力、应变状态及演化过程，阐明了弯管成形过程受力变形特点及力学原理；提出了一种适合弯管变形分析的新单元及数值方法；建立了弯管成形过程应力、应变场&标准图象&；通过研究弯管成形过程金属流动规律及力学条件，阐明了本工艺塑性变形机理；建立了描述弯管成形过程的曲锥面向量方程及其质点运动学图象；推导了弯管成形过程应力、应变场理论模型；结合大口径弯管生产过程，验证了本文给出的新型牛角芯棒设计方法和管坯长度计算公式的正确性。

Besides chemical factors, mechanical effect also plays a certain role in controlling calcification since the stability of calcium carbonate crystal is dependent on pressure.

影响转换除了化学因素外，机械力学也很有关系，因为碳酸钙的稳定度与压力有关。贝类的碳酸钙结晶只产生在开口处，壳会随身体成长，有个有趣的力学机制在控制晶相的转换。

Geomechanics is a subject that studies the regular pattern of geological structure and earth crust movement with mechanical principle.

地质力学是用力学的原理来研究地质构造和地壳运动规律的学科。

The appearance of high-speed and super- high-speed elevator s bought various aerodynamic problems; one of these problems is the encounter process of elevator car and counter-weight in the hositway channel.

高速以及超高速电梯的出现带来了一系列的气动力学问题，轿厢和对重交错过程中的气动力学问题便是其中之一。

Through indoor conventional experiment, saturation test and non-confining compression strength test , research has been put to the physical and mechanical characteristics of the loess consolidated by Na_(2)SiO_(3) solusition, a Na_(2)SiO_(3) composite body, and the basic mechanical parameters of the loess near the Daming Palace Han Yuan Temple have been acquited.

通过室内常规实验、浸水实验、无侧限抗压强度实验，对Na2SiO3溶液加固的黄土-Na2SiO3复合体的物理力学特性进行了室内实验研究，取得了大明宫含元殿窑址附近黄土-Na2SiO3复合体的基本力学特性参数，可供该地区其他类似条件的遗址加固设计参考。

In order to disclosure new and old concrete bonding mechanics performance and mechanism under high temperature, the paper studies the influence of high temperature on new and old concrete bonding mechanics behavior with two types adherences: bonding first to heating second and heating first to bonding second.

为了揭示高温下新老混凝土粘结的力学性能和粘结机理，本文分先粘结后高温和先高温后粘结两种类型研究了高温对新老混凝土粘结力学性能的影响。

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。