The perforation performance is an important index of oil - layer casing representing the resistance to initial brittle crack growth.
射孔性能是油层套管很重要的一项指标，它代表着油层套管抵抗裂纹脆性扩展的能力。
The existence of grey spot may cause brittle crack of the joint, therefore, controlling grey spot occupy a decisive position to ensure the quality of rail resistance welding.
灰斑的存在易导致接头的脆性断裂。因此，控制灰斑对保证钢轨接触焊质量举足轻重。
The results show that the cracking of the tap valve is brittle crack, which is due to overheat to cause the formation of defects, such as coarse grains, Widmanstatten structure and porosity.
结果表明，水龙头阀体开裂是由于存在过热造成的晶粒粗大、魏氏组织、铸造疏松等缺陷引起的脆性开裂。
Brittle fracture. Fracture that occurs by rapid crack propagation and without appreciable macroscopic deformation.
通过快速裂纹扩展发生断裂，没有明显的宏观变形。
Dry, brittle nails that frequently crack or split have been linked to thyroid disease.
干、脆甲症常表现指甲裂开或劈开，与甲状腺疾病有关。
Therefore, the roll surface is extremely hard and brittle and it is thermally unstable. In addition, it is highly crack sensitive because of the high hardness.
因此，辊子表面有极高的硬度、脆性及热不稳定性。另外，由于高的硬度使之具有高的裂纹敏感性。
I can love you tore heart crack lung, also can go dry simply brittle.
我可以爱迩撕心裂肺，也可以走得干干脆脆。
Through analysis on inside weld forming and welding procedure of SSAW pipe, it pointed out weld crack is easy to appear in brittle temperature zone in welding pool.
通过对螺旋埋弧焊管内焊缝成型和焊接过程的分析，指出焊缝裂纹易产生在焊接熔池脆性温度区。
The result proves that reclaimed concrete perforated brick is a brittle material that will not accrue to crack under normal service modes so it can be a new wall material substitute for clay brick.
结果表明，再生混凝土多孔砖是脆性材料，在正常的使用状态下，不会出现裂缝，可以成为替代黏土砖的一种新型墙体材料。
The method of brittle coat is used to study reflective crack of asphalt pavement, comparing the experimental results with that gotten by FEM.
采用脆性涂层法研究沥青路面的反射裂缝，并将试验结果与有限元计算结果进行了比较。
Longitudinal crack of drill pipe box joint is brittle fracture at low stress.
钻杆接头的各种纵向开裂属于低应力脆性断裂。
Calculation methods of crack spread length are investigated by means of stress theory and brittle fracture theory.
本文从强度理论和脆断理论两方面对此情况下裂纹传播长度的计算方法进行探讨。
A boundary 's equation of microcrack region near crack tip of such brittle materials as concrete has been obtained according to the Griffith' s criterion and fracture mechanics.
利用格利菲思强度准则和断裂力学原理求得了混凝土类脆性材料裂缝端部微裂缝区的边界方程。
The results show that brittle fracture occurs in matrix and the P-WCMOD(crack mouth opening displacement) curve is linear till loading to failure.
实验结果表明：水泥基体发生脆性断裂，从加载到试件破坏P-WCMOD曲线一直呈线性；
Based on the principle of fracture mechanics, the stop criterion of brittle fracture is proposed and the equation of minimal crack stop is given.
根据断裂力学的原理，提出了脆性破裂的止裂准则，给出了最小止裂方程。
This paper presents a theoretical analysis about the propagation rule of the micro-crack in brittle materials under axial compression, based on the energy release rate criterion.
本文利用混合型裂纹扩展的能量释放率理论对脆性材料受轴向压缩时其内部微观裂纹的扩展规律进行了研究。
The present cohesive crack model based on the XFEM provides a useful way to simulate cracking in quasi-brittle materials.
基于扩展有限元法的粘聚裂纹模型为准脆性材料的开裂过程模拟提供了一种有效途径。
Cleavage fracture is a typical brittle fracture and also a process consisted of crack producing and spreading, and the mechanism is related to dislocation and crystalline grain.
解理断裂是典型的脆性断裂，解理断裂也是一个裂纹萌生和扩展的过程，其机制与位错和晶粒有关。
The research results showed that the slab surface temperature dropping into the third brittle zone played an important role in causing transverse crack formation of microalloyed slab.
研究表明，铸坯表面温度落入钢的第三次脆性温度区是造成铸坯表面横裂的一个重要原因。
Numerical analysis results show that the peak strength of the rock specimens increases as homogeneity increases and crack propagates smoothly until brittle fracture takes place.
结果表明，在均质度较高的岩石试件中，岩石强度相对高，并且裂纹扩展表现出很强的脆性；
Combining with the cohesive crack model, the behavior of structure in the range from ductile to brittle instability and the factors influencing the brittle failure are studied.
结合粘结裂纹模型，研究了结构从延性到脆性失稳的特性以及引起脆性破坏的影响因素。
Fracture test of the BT20 indicates that brittle unstable fracture occurs after ductile crack initiation and slow propagation for all the compact tension (ct) specimens.
BT 20钛合金断裂试验表明，CT试样均在裂纹延性启裂并缓慢扩展后，发生脆性失稳断裂。
The subcritical crack growth mechanism in brittle materials is studied from the viewpoint of mesomechanics.
本文从细观力学角度研究了高脆性材料亚临界裂纹扩展机制。
Wire wrapped on cement pipe occurs brittle fracture in crack of cement pipe supplying water under pressure.
水泥管在输水加压后产生爆裂，水泥管缠绕钢丝产生脆断。
In order to predict effects on machined surface by developed notch-crack, crack extension mechanism of notch-crack-tip was investigated in cutting brittle materials.
为预测缺口裂纹对加工表面形成的影响，研究了切削脆硬材料时缺口裂纹的扩展。
And that the Angle between extending crack and principal axial stress decreases gradually is caused by the variation of tensile and shear stress focuses in the course of brittle formation.
而扩展裂纹与主应力夹角的逐渐减小则是裂纹附近张应力和剪应力集中点的变化所致。
Based on the failure analysis of reinforced concrete and the fracture behavior of concrete as a type of quasi-brittle materials, a model of matrix crack with bridging bar is proposed in this paper.
基于钢筋混凝土的破坏分析，结合混凝土类准脆性材料的断裂特性，本文提出了强化筋桥联基体裂纹力学分析模型，在该虚拟裂纹端部存在粘聚力分布，而强化筋在桥联裂纹处具有与基体脱离的部分段。
In the case of sub-brittle fracture, at the crack tip there is a small plastic region of which effect should not be neglected.
在准脆性断裂情况下，裂纹顶端存在一个不能忽略其影响的小范围塑性区。
In the case of sub-brittle fracture, at the crack tip there is a small plastic region of which effect should not be neglected.
在准脆性断裂情况下，裂纹顶端存在一个不能忽略其影响的小范围塑性区。
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