查询词典 crack a book

But the concrete is non- one kind homogenizes the fragility material, under having certain temperature and humidity situation, the concrete is hardened and produced the volume out of shape, he is out of shape and inconsistent because of making up the material of the concrete, restrain from, produce initial stress each other, cause between aggregate and stone bonding surface of cement or cement produce the very small crack between the stone,These cracks are irregular, discontinuous too, under the influence of external factor, may also develop into a macroscopical crack.

但混凝土是一种非匀质脆性材料，在具有一定的温度和湿度情况下，混凝土硬化并产生体积变形，由于组成混凝土的材料其变形不一致，互相约束产生初始应力，造成在骨料与水泥石粘结面之间或水泥石本身之间产生微细裂缝，这些裂缝既不规则，也不连贯，在外界因素影响下，还可能发展成宏观裂缝。

Some typical torsion problems of a cylinder involving a straight,kinked or curvilinear crack were calculated.The obtained results for the case of straight crack...

对圆弧裂纹、曲折裂纹以及直线裂纹的典型问题进行了数值计算，并与用Gauss_Chebyshev求积法计算的直裂纹情形结果进行了比较，证明了方法的有效性和正确性。

The convection heats that is apart from to 13 meters between the well heats the oil shale retorting mine process, heat the temperature as 600°C. Adopting single crack heating to need 4 years can make the whole hot solution district attain 500°C above, the adoption double crack heating need a year and can make whole hot solution the district attain 600°Cs or so.

3在井间距为13米的对流加热油页岩干馏开采过程中，加热温度为600℃，采用单裂缝加热需要4年就可使整个热解区域达到500℃以上，采用双裂缝加热需要1年就可使整个热解区域达到600℃左右。

The test result shows that fatigue crack rate in welding line area is greater than that in parent metal when crack stress intensity factor amplitude △K is greater than 20 Mpa,but there is no more difference.

试验结果表明，在应力强度因子幅△K＞20Mpa后疲劳裂纹在焊缝区的扩展速率比在母材的大，但两者差距并不悬殊。

The object of the present paper was to study the relationship between corrosion fatigue crack growth rate da/dN and stress intensity factor amplitude ΔK of 07MnNiCrMoVDR steel by corrosion fatigue crack growth rate experiment in H2S solution. This steel is the typical material used in chemistry and oil chemistry equipment in our country. Corrosion fatigue safety assessment method of pressure vessels with defects in service could be explored and investigated.

本文研究通过对我国化工和石油化工装置中的典型材料07MnNiCrMoVDR钢在腐蚀介质H2S水溶液中疲劳裂纹扩展速率的研究，寻找其腐蚀疲劳裂纹扩展速率da/dN和应力强度因子幅值ΔK之间的关系，探索研究在役含缺陷压力容器腐蚀疲劳安全评定技术。

According to the new model and linear elastic fracture mechanics, an expression for CFCP rate, which revealed the quantitative correlation among CFCP rate, stress intensity factor amplitude, the CFCP threshold, the corrosion rate of the bare metal at the crack tip, loading frequency and the critical fracture stress of the hypothetical material elements along the crack path, was derived.

根据该模型和断裂力学原理，导出了CFCP速率的定量表达式，它揭示了CFCP速率与力学条件，裂尖表面腐蚀率、加载频率、假设的裂尖材料元临界断裂应力之间的定量关系，并能说明氢脆对CFCP率的影响规律。

And then, take a 样纸 of the above checks, you peel to the backing sheet paper and again check the backing sheet on crack, because crack sometimes is a very small, only separated from the backing sheet and paper before it can be found.

然后，取一段经过上述检查的样纸，剥于底纸再次检查一下面纸和底纸上是否有裂纹，因为裂纹有时是非常小的，只有分开底纸和面纸后才能发现。

Longitudinal crack, transverse crack and binding course failures are often occurred with high frequency in asphalt pavement of long-span steel bridges. Researchers all over the world have done a lot of work to study these problems from the point of the mechanical properties of pavement.

中文摘要：大跨径钢桥的桥面铺装常常出现纵向裂缝、横向裂缝、粘结层失效或脱层等病害，针对这些问题，国内外科研人员从铺装层受力的角度，进行了大量的研究工作。

Based on the work flow of charging equipment, three worst work conditions of the clack box were defined. Then, based on thermal-structure coupled theory, the thermal-structure coupled of the clack box which suffered from mechanical and temperature load was analyzed using the powerful software ANSYS. The clack box's temperature field and stress field as well as the stress spectrum of danger area in actual working condition were obtained. Finally, based on crack initiation and crack extension theory, the clack box's fatigue life was predicted.

摘 要：根据装料设备的工作流程，确定阀箱3种最不利的载荷工况；基于热－结构耦合理论并利用有限元分析软件ANSYS研究阀箱在温度载荷和机械载荷作用下的热－结构耦合问题，得到实际工况下阀箱的温度场、应力场以及危险部位的应力谱；依据裂纹萌生和扩展理论对阀箱进行疲劳寿命预测。

According to the structure of terrane and exploring water result of coal floor disclosed by hydrology drill hole,it is demonstrated that there exists strong relationship among abnormal apparent conductivity, crack in rock stratum and the extent of filled water in crack,an.

应用音频电透视技术，分析了杨村煤矿2702工作面底板30 m和50 m深度界面的探测成果，并与井下水文钻孔揭露的煤层底板岩层结构及探水结果对比研究，发现音频电透视探测的煤层底板综合视电导率高异常与岩层的裂隙性及其充水程度具有很强的关联性；岩层裂隙与含水层连通性良好部位明显显现视电导率高值异常，结果表明，音频电透视探测成果能够综合反映底板岩层的阻水条件。

Objective To investigate the relationship between ovum fertilization rate and sperm morphology, acrosome reaction in IVF and to explore the influence of parameters of sperm on fertilization rate.

目的 研究体外受精(in vitro fertilization，IVF)中精子形态、顶体反应与卵子受精率之间的关系，分析精子各参数在IVF受精率方面的参考意义。

A: I hear Mr. White wants to run for the Presidency!

我听说怀特先生要参加总统竞选！