It is a complicated problem involving several of subjects such as geology, coal mining, rock hydraulics and rock crack mechanics.
煤层底板突水是涉及地质学、煤矿开采学、岩体水力学和岩石断裂力学等学科的一个复杂问题。
Stress intensity factor (k). A factor used in fracture mechanics to specify the stress intensity at the tip of a crack.
应力强度因子(K)：断裂力学中使用的一个因子，说明裂纹尖端处的应力强度。
Fatigue damage estimation of the tendons was made using fracture mechanics approach, establishing the fracture crack growth rate model and limit state equations for failure modes.
疲劳寿命的计算采用断裂力学方法，建立疲劳裂纹扩展模型和失效模式的极限状态方程。
The research of dynamic propagation of crack is prevalent in explosion mechanics.
爆炸裂纹的动态扩展问题是爆炸力学研究的热点。
The fracture properties of RPC(Reactive Powder Concrete) and fibre RPC are analyzed by the Fictitious Crack Model(FCM) and the linear elastic fracture mechanics.
采用虚拟裂缝模型结合线弹性断裂力学的方法，分析了RPC（活性粉末混凝土）及纤维增强RPC的断裂特性；
This paper studies the fracture mechanics of piston crown crack by means of finite element method and photoelastic method.
本文应用有限元法和光弹性试验对活塞顶的裂纹进行断裂力学分析。
Fracture mechanics is adopted to estimate the fatigue life of structural members, and among the rest, crack growth rate formula is studied.
本文采用断裂力学方法来估算结构构件的疲劳寿命，这其中主要围绕裂纹扩展速率表达式展开研究。
The fracture dynamics is always the hot point of the research of the fracture mechanics, and the study on the crack is especially so.
断裂动力学的研究一直是断裂力学中的一个热点，裂纹问题更是其中的一个热点所在。
Therefore, predicting crack turn accurately and predicting the crack propagating trajectory accurately is a important researching content of fracture mechanics for integrally structure.
因此，准确地预测裂纹转折从而准确地预测裂纹扩展轨迹是整体结构断裂力学研究的一个重点内容。
Stability of the crack should be checked by the method of fracture mechanics, which should be a supplemental stability condition of the gravity DAMS.
坝踵裂缝扩展是重力坝破坏的开始。应该用断裂力学方法校核坝踵裂缝的稳定性，并以此作为重力坝稳定的补充条件。
And it is suitable to analyze dam crack propagating with fracture mechanics methods.
对坝体裂缝扩展的分析计算，用断裂力学的理论和方法较为适宜。
An exact expression of energy release rate for geometrical nonlinear elastic fracture mechanics is obtained for an infinite plate with central crack under uniform stress normal to crack surfaces.
对含中心裂纹的无限大板在裂纹表面受均匀分布压力作用的情况，导出了几何非线性弹性断裂力学的能量释放率的一个精确表达式。
Principle analyse produce powder bag stress produced to explode involve and produce and catch gas can cut function mechanism that crack expand further gathering mainly according to fracture mechanics.
根据断裂力学原理分析了主爆药包爆炸产生的应力波及爆生气体对聚能切割裂隙进一步扩展的作用机理。
Combining with finite element method, fracture mechanics has been an important way to solve crack problem in road field at present.
将断裂力学理论与有限元方法结合是分析路面开裂问题的有效途径。
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 exact solution of linear elastic fracture mechanics is suggested in this paper and the plastic zone of crack tip is calculated under the condition of strain-hardening of material.
本文从线弹性断裂力学的精确解出发，在考虑材料强化影响的情况下，计算出裂纹前缘的塑性区。
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。
On the basis of summarizing testing effects, the extension of crack and the breaking mechanism of top coal caving in steep seam have been analyzed by applying fracture mechanics theory.
在总结现场试验效果的基础上，应用断裂力学理论分析了急倾斜煤层巷道放顶煤顶煤破断裂纹的扩展和破碎机理。
In this article, authors present the test results, using the contrast experiment method, that chemistry grouting improved the mechanics capability of the concrete member with different form crack.
本文介绍利用对比实验方法，研究具有不同形式裂缝的混凝土构件在化学灌浆后的力学性能改善情况。
Based on the theory of dynamic fracture mechanics, the mechanism of crack-forming among shot holes in the directional split of rock by controlled blasting is expounded.
基于断裂动力学理论，文章论述了切缝药包定向断裂控制爆破炮孔间贯通裂纹形成的机理。
In addition, the crack propagation and fatigue damage of CSP under wind load in the case of the material which have initial crack have been analyzed using fracture mechanics method.
此外，还运用断裂力学方法分析了材料有初始裂纹的管道在风荷载作用下的裂纹扩展及疲劳损伤。
Supposing the defects as the initial crack, using the theory and testing method of fracture mechanics, the nonlinear fracture process and character of frozen soil are investigated.
把这些缺陷简化为冻土中的初始裂纹，应用断裂力学理论和试验方法，研究冻土的非线性断裂过程和特征。
Starting with the nonlocal continuum theory, a new rational mechanics method is applied to study logically the cohesive stress law of ahead of a crack tip.
从非局部连续介质理论出发，采用一种新的理性力学方法对裂纹前缘内聚应力分布规律进行研究。
The stress intensity factor of crack solids is a fracture mechanics index that denotes the effect of loading and crack geometry.
黏聚力形成的阻抗强度因子数值，与黏聚裂纹长度和材料极值拉伸应力存在数量关系。
For researching crack initiation condition and water injection pressure needed, this paper built up a mechanics model of crack tip based on crisp fracture theory of compound crack.
为研究初始裂缝尖端起裂的条件和所需注水压力，依据断裂力学的复合型裂纹的脆性断裂理论，建立了裂缝尖端力学模型，给出了计算方法。
The methodology of fracture mechanics based on continuous crack growth was applied to the investigation of the microscopic damage evolution and toughness calculation for fiber composites.
文中以裂纹连续扩展的断裂力学方法，研究单向纤维复合材料的细观损伤演化与韧度计算。
Some measures have been taken to improve mechanics performance and median crack has been removed through studying internal component.
研究转炉冶炼spa - H耐候钢带的内控成分，探讨为改善力学性能、中间裂纹而采取的工艺措施。
On the basis of piece-wise-linear plasticity and fracture mechanics, this article presented a 2-dimensional holonomic and nonholonomic constitutive model for cohesive crack of concrete-like materials.
基于分段线性塑性理论和断裂力学理论，提出了一种二维的全量形式和增量形式的粘性裂纹的本构模型。
The study of problems involving crack initiation, propagation and arrest is always the interest of fracture mechanics.
复合型裂纹起裂、扩展和止裂问题一直是断裂力学研究的重点。
These can be essentially obtained by the distribution analyses of the stress and strain extreme values near the crack tips according to the theory of fracture mechanics.
利用断裂力学中的裂纹尖端应力和应变场的极值分布情况，可以从根本上解决这一问题。
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