The basis of linear fracture mechanics is the paper of Griffith which was unrecognized for thirty years. 线性断裂力学的基础是Griffith的论文,但这篇论文三十年来都没有得到承认。
Analysis of Asphalt Pavement Structure Base on Linear Elastic Fracture Mechanics 基于线弹性断裂力学的沥青路面结构分析
Study on the application of a coupled element-free Galerkin-finite element method in linear elastic fracture mechanics 无网格法与有限元法的耦合在线弹性断裂力学中的应用
Based on the linear elastic fracture mechanics, the paper analyses the influence factors of widening pavement cracking under two load modes using the computer package ABAQUS. 基于线弹性断裂力学模型对工程中存在的宏观裂缝进行稳定性分析,采用位移直接法计算缝端应力强度因子。
Three Dimensional Theory of J Integral and Its Preliminary Applications in Three Dimensional Problems of Linear Fracture Mechanics J积分的三维理论及其在线性断裂力学中的初步应用
Under tension and shear conditions related to unloading of rock mass, a linear elastic fracture mechanics model of jointed rock mass is established. 据岩体在卸荷情况下的拉剪应力状态,确定了节理岩体的线弹性断裂力学模型。
In view of the nonlinear character of cracking of concrete material, analysis and calculation of the dam with crack directors are carried out by the nonlinear method of linear elastic fracture mechanics together with the fictitious crack model. 按混凝土材料开裂的非线性特性,用线弹性断裂力学与虚拟裂缝模型相结合的非线性方法,对含诱导缝坝体进行了分析计算;
Double-parameter model is one based on corrected linear fracture mechanics and double-k model is based on fictitious crack model. 双参数模型是一种基于修正的线弹性断裂力学的混凝土断裂判断准则。双K参数模型则以虚拟裂缝模型为基础,考虑了混凝土内聚力的作用。
Cases of orbital floor fracture, One case of linear fracture of maxilla and 2 cases of linear fracture of mandible were not demonstrated or not clearly on two-dimensional ( 2D) image. 3例眶底骨折,1例上颌面线形骨析,及2例下颌角线形骨折二维来显示或显示欠清晰;
This article makes research on the behaviour of small fatigue crack growth in axle steel and compares it with the behaviour of large crack growth calculated by traditional linear elasticity fracture mechanics. The study shows that both are different. 本文论述了车轴钢在疲劳试验研究中小裂纹扩展的特性,并与传统的断裂力学中长裂纹扩展特性进行了比较,发现两者不同的特性。
The cracking mechanism based on non linear fracture model for rock concrete materials is proposed and micro mechanical model for fracture process zone ( FPZ) established. 提出了一种描述岩石、混凝土类材料断裂损伤过程区的细观力学模型,用于分析材料的非线性断裂的微观机理。
In this paper the experimental method is used to study the linear elastic fracture properties of concrete. 本文用试验的方法研究了混凝土的线弹性断裂性能。
A nondestructive detecting method based on modal analysis is presented for beam-type structures from perturbation method and linear elastic fracture mechanics. 运用摄动方法和线弹性断裂力学理论讨论了基于模态分析的梁型结构无损检测方法。
We have calculated crustal thickness by use of gravity data, and then researched further the linear fracture system on the ground surface and the display of present crustal movement in Three-Gorge region, western Hubei province. 基于这一思路,本文利用重力资料计算反演了鄂西三峡地区地壳厚度分布、重力均衡状态,进而着重研究了地表线性断(破)裂系统和现代地壳运动特征(包括地震活动)。
The method for treating this kind of material with low yield stress σ_ ( 0.2) and low toughness using linear elastic fracture mechanics is also studied. 文中还探讨了此种低σ(0.2)和低韧度材料的线弹性断裂力学处理方法。
On the basis of the theory of two-dimensional elastic plate with holes, the use of the theory of linear elastic fracture mechanics in the hydraulic fracturing of oil and gas wells is discussed in this paper. The formulas for computing fracturing pressure of rocks have been obtained. 本文以二维弹性孔板理论为基础,应用线弹性断裂力学理论,对油气井水力压裂作了理论分析,并得出了计算岩石破裂压力的公式。
A method for predicting the bending fatigue life of a surface quenched gear is proposed based on two-dimensional linear fracture mechanics and a computer program is developed. 基于二维线性断裂力学理论,提出了一种表面淬火齿轮的弯曲疲劳寿命预测方法,并开发了相应的计算程序。
Based on Linear Interfacial Fracture Mechanics, a new welding joint model-multi layered interfacial model is proposed in this paper. 基于线性界面断裂力学,提出了焊接接头的新模型&多层模型。
Secondly the linear elastic fracture problem of the finite stiffened cracked plate is studied. 接着对有限加筋板的线弹性断裂问题进行了分析。
Objective To evaluate biomechanical stability of a rigid internal fixation device used for treatment of mandibular linear fracture in dogs. 目的:评价一种新型坚固内固定器械用于治疗犬下颌骨线性骨折的生物力学稳定性。
The linear fracture condition which has been shown to be applicable to a wide variety of materials of engineering importance, is detailed with special reference to its technological significance. 现已证明线性断裂条件可用于许多工程材料,这里着重叙述的是它的技术意义。
In this paper, a theoretical analysis of the effect of residual stresses on the fatigue behavior of welded butt joints was developed by using linear elastic fracture mechanics ( LEFM), superposition principle and finite element approaches. 利用线弹性断裂力学(LEFM)理论、迭加原理和有限元分析方法,就残余应力对对焊接头的疲劳性能的影响进行了理论分析。
The Theory and Application of HT FEM On Linear Fracture Problems 线弹性断裂问题的HT有限元理论及应用
By employing the analytical relationship between the strain energy release rate and the stress intensity factor in linear elastic fracture mechanics and the size of crack, a model of crack size in time domain is derived to detect the size of crack. 应用线弹性断裂力学中的应变能释放率和应力强度因子与裂缝尺寸的解析关系式,推导出了时域内的裂缝尺寸模型来识别裂缝的尺寸。
Therefore, linear elastic fracture mechanics can be applied to stability analyses of cracks in mass concrete structures and to improving design methods of hydraulic structures. 因此线弹性断裂力学可以很好地应用于大体积混凝土结构的裂缝稳定性分析和改进水工结构的设计方法。
Based on the curve of fatigue life reliability theory and based on the linear elastic fracture mechanics the fatigue life reliability theory two aspects to evaluate the fatigue performance of the shear pin. 从基于S-N曲线的疲劳寿命可靠性理论和基于线弹性断裂力学的疲劳寿命可靠性理论两方面来评价剪力销的疲劳性能。
This dissertation establishes the finite elements with generalized degrees of freedom in fracture mechanics on the basis of finite elements theory and linear elastic fracture mechanics theory. 本文依据有限元理论和线弹性断裂力学理论等,建立了关于断裂力学的广义参数有限元的计算理论和方法,并利用该方法对一些算例进行了相应的数值试验。
The method based on S-N curve and linear elastic fracture mechanic for assessing fatigue life and fatigue safety evaluation is applied to an existing concrete bridge. 运用基于S-N曲线的疲劳分析方法和基于线弹性断裂力学的混凝土桥梁的疲劳寿命与使用安全评估方法对实际混凝土桥梁的主要受力构件进行了疲劳寿命评估。
Therefore, criterion of linear fracture mechanics is not available, and analysis method of non-linear fracture mechanics needs to be used as fracture criterion of concrete. 所以线性断裂力学的判据就不能使用,必须采用非线性断裂力学的分析方法来确定混凝土材料的断裂判据。
As one branch of Fracture Mechanics, the development of linear elastic fracture mechanics ( LEFM) is the earliest and perfect. 线弹性断裂力学(LEFM)是断裂理论中最早的、也是发展最完善的一个分支。