分析了功能梯度材料中币型裂纹扩展问题。
The growth of a penny-shaped crack in a functionally graded material is analyzed.
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。
The study of problems involving crack initiation, propagation and arrest is always the interest of fracture mechanics.
拉伸条件下，含裂隙试件的破坏机制是张拉型裂纹的贯通作用。
Under uniaxial tensile conditions, the failure mechanism of fractured specimens is the coalescence role of tensile crack.
还会形成穿透型裂纹，造成镀层下本体金属的疲劳或应力腐蚀裂纹。
Through-thickness cracking also can lead to fatigue or stress corrosion cracking of the base metal beneath the plating.
利用当量直线裂纹扩展法研究复合型裂纹的能量释放率及相应的断裂判据。
The energy release rate and failure criterion for mixed mode are investigated by means of the method of equivalent linear crack extension.
实验得出了最佳V型裂纹张角，对其断裂控制效果作了三维模型试验验证。
The optimum angle of V-shaped cracks is obtained. The fracture control effect is verified by three-dimensional modelling tests.
文章介绍了传统的用裂尖塑性修正求解平面I型裂纹等效应力强度因子的方法。
This paper presents a numerical extrapolated method for calculating the effect stress intensity factor of 2-d Mode I crack.
本文改进BCS型裂纹位错模型，并对裂纹顶端范性区的位错密度分布进行了计算。
The dislocation distribution function in the plastic zone at a crack tip is calculated with the help of a modified BCS-type crack model.
本文建立了准静态情况下I型裂纹的断裂准则，提出了新的表面能概念及其表达式。
This article establishes a fracture criterion of crack type I under quasi-state conditions and brings forward a new concept and an expression of surface energy.
然后，利用能量平衡关系，得到仅与表面能密度相关的I型裂纹内聚力新的本构方程。
Then, by means of the energy balance relation, a new cohesive stress law of Mode I crack is obtained which is only concerned with the surface energy density within the cohesive zone.
对任意二维型裂纹群，受复合载荷作用时的相互干涉效应，本文提出了改进型体积力法。
The improved body force method is proposed for analyzing interaction behaviors of arbitrary multiple through-cracks under complex loading.
通过观察裂纹的开裂角及扩展路径，提出了一个能用来估算Z型裂纹过载迟滞效应的简单模型。
By observing the initial Angle of crack arid its propagating path, a simple model to predict the retardation effect of Z-shaped fatigue crack was proposed.
本文推导出了含复合型裂纹的变厚度板在承受体力和面力、存在非均匀温度场的情况下的能量差率表达式。
An expression of energy difference rate in a plate of non-uniform thickness with a crack of mixed mode under both body force and surface tractions in a non-uniform temperature field is derived.
研究了裂纹尖端圆弧对应力强度因子的影响，分别计算了具有不同裂尖圆弧 的I型裂纹的应力强度因子。
The effect of crack tip arc on stress intensity factor is studied assuming plane stress condition. The stress intensity factors KI with different crack tip arcs are separately calculated.
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。
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.
最后给出了裂纹尖端接触区的大小和接触应力的数值结果，揭示了这种接触型裂纹模型的动力学特征及物理上的合理性。
The numerical results on contacting region and stresses amplitudes are given in this paper, which show that the dynamic features of this model are complicated, and this model is physically reasonable.
最后给出了裂纹尖端接触区的大小和接触应力的数值结果，揭示了这种接触型裂纹模型的动力学特征及物理上的合理性。
The numerical results on contacting region and stresses amplitudes are given in this paper, which show that the dynamic features of this model a...
文章对含i型裂纹的正交各向异性功能梯度材料板沿其板厚的弹性常数表达式呈指数函数变化时的应力-应变场进行分析。
In this article, the fracture analysis on mode I crack of orthotropic functionally gradient materials is studied, under which the elastic constants changed exponentially along thickness of the plate.
最后本文给出了裂纹尖端粘着区的大小和粘着应力的数值结果，其结果揭示了这种粘着型裂纹的动力学特性和物理上的合理性。
The numerical results on contacting region and stresses amplitudes near the crack tips are given in this paper. These results show that the dynamic featu…
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。
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.
其次将应力与位移代入应变能释放率的基本公式，推出了Ⅰ、Ⅱ混合型，Ⅲ型以及Ⅰ、Ⅱ、Ⅲ混合型裂纹尖端应变能释放率的具体计算公式。
And then, substituting stress and displacement into basic formula of strain energy release rate, computing formula for strain energy release rate of mode III, mixed mode crack tips are direved.
以混凝土单轴拉压损伤为基础，给出了单元弹性损伤本构关系，分析了裂纹尖端损伤微裂区尺寸，定义了有效应力强度因子，给出了I型裂纹损伤断裂判据。
Mesoscopic damage size on the top of crack is analysed, the effective stress strength factor is defined, the mode I crack damage fracture criteria is presented.
就在几周前，飞机工程师才发现他们并没有完全了解金属疲劳——四月一日，西北航空公司812航班使用的波音737-300型客机在从凤凰城飞往萨克拉门托的途中发现在机身的上半部有一个五英尺的裂纹，不得不紧急迫降。
Over the past few weeks, aircraft engineers have found they do not know quite as much about metal fatigue as they thought.
全面总结了韶山7型电力机车抱轴箱体在使用中发生裂纹的现场处理、理论分析和设计改进的过程。
Summed up is the process of the crack treatment on spot, the theory analysis and the design improvement of the hugging-bearing box body (HBBB) for SS7-type electric locomotive.
压圈原材料中心疏松及锭型偏析是导致裂纹形成的主要原因。
The results showed that central porosity and ingot shape segregate were the major causes of the cracking.
自主设计了改进型ZL - 2超强脉冲电流发生装置，采用它实现了金属模具试件中裂纹的电磁热止裂。
The space crack arresting in metal die has been conducted on a new super-density pulse current generator model ZL-2 designed by author.
密封环裂纹一般是径向发散型的，可以是一条或多条。
Sealing ring radial cracks are generally divergent, and may be one or more.
用权函数方法对中心裂纹巴西试样的对径加载作了-复合型断裂分析。
The mixed mode fracture of center cracked Brazilian disk specimen subjected to diametral compression is analysed by weight function method.
用权函数方法对中心裂纹巴西试样的对径加载作了-复合型断裂分析。
The mixed mode fracture of center cracked Brazilian disk specimen subjected to diametral compression is analysed by weight function method.
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