Probability analysis of random crack core evolvement in unidirectional composites 单向复合材料随机裂纹核扩展过程概率分析
An Investigation on Random Fatigue Strength of K-Type Tubular Joints and Crack Propagation Behaviors K型管状接头随机疲劳强度和裂纹扩展规律的研究
Random distribution of fatigue crack sizes 疲劳裂纹尺寸的随机分布
Monte-Carlo sampling technique is employed to investigate relationship among random variables such as crack depth, ratio of crack depth to length, fracture toughness, yield strength, transmission pressure and failure probability of oil and gas pipeline with defects. 利用Monte-Carlo方法全面分析了裂纹深度、裂纹深长比、断裂韧度、屈服强度和输送压力等主要随机参数对含裂纹长输油气管线结构的失效概率的影响。
Recent developments in modeling of random fatigue crack growth 疲劳裂纹扩展随机模型研究近期进展
Statistical analysis to random process of fatigue crack propagation 疲劳裂纹扩展随机过程的统计分析
Random Process Model of Crack Propagation in a Steel Structure 钢结构裂纹扩展的随机过程模型
New Method for Measuring the Random Thresholds of Long Fatigue Crack Propagation 测定概率疲劳长裂纹扩展门槛值的新方法
Design of optical fiber intelligent check measurement and forecasting system for random crack of dam 大坝随机裂缝的光纤智能检测、预警系统设计
STRESS INTENSITY FACTORS FOR PERIODIC STIFFENED STRIPS WITH RANDOM CRACK AND/ OR HOLE In this paper we consider uniform extension problems for joined two half-planes with different thickness and material behavior and one of which contains an elliptical hole, the other contains a crack. 含任意分布裂纹与缺陷的板条加筋结构的应力强度因子本文研究两种不同材料、不同厚度、各带裂纹和椭圆孔的半无限平面加筋结构受均匀拉伸的问题。
Based on R6 method, a new method for calculating the reliability of components was proposed. The influence of some random variables, such as fracture toughness, crack sizes, loading on the reliability of components was analysed. 基于R6方法提出了一种计算构件可靠度的新方法,用该方法分析了断裂韧性、裂纹尺寸、载荷等随机因素对构件可靠度的影响。
The random deterioration process of a structural strength is described based on the Paris crack growth law. 本文按Paris裂纹扩展定律描述了因裂纹扩展而导致的结构强度的随机衰减过程。
The statistical analysis of random crack growth for wing panels 机翼壁板随机裂纹扩展统计分析
To monitor the random crack of the concrete dam structure with the ordinary instrument isn't effect. 如何监测大坝混凝土结构的随机裂缝,常规仪器显得无能为力。
And ( 3) due to suppression of grain boundary slip at triple grain boundary node, the high ∑& value and random grain boundary among the three boundaries of tricrystal crack easily during cyclic deformation. 三叉晶界的节点抑制了晶界滑动,是形变不协调较大的区域,造成较大的应力集中,尤其三条晶界中的高∑值的或随机的晶界,往往是沿晶开裂的优先部位。
According to the basic theory of structural reliability and design theory of unbonded partially prestressed concrete structure, based upon extreme theory of random variable and crack number of beam, the system reliability of an unbonded partially prestressed concrete beam is analyzed. 根据结构可靠性的基本理论和无粘结部分预应力混凝土结构设计原理,分析了基于随机变量的极值理论和梁裂缝数目的无粘结部分预应力混凝土梁的体系可靠性。
It realized random section and any son pieces in rock mass to analyse the crack face distribution characteristic conveniently and directly and brought great convenience to analyse stability and stress distrubution in rock mass undoubtedly. 实现了对岩体内部任意剖面和任何子块角度直接调用分析裂缝分布的便利,无疑给岩体工程稳定性及其应力分布分析带来极大的方便。
Based on the random loading test, physical model and computing formulae for crack propagation are established considering the effect of interaction between high and low stresses, and a program is presented for use in computing random fatigue life. 在随机加载试验的基础上,建立考虑高、低应力相互作用的裂缝扩展物理模型和计算公式,提出了计算随机疲劳寿命的程序。
Modeling theory of random media with crack number density of spatial distribution 裂纹数密度具有空间分布的随机介质模拟理论
Using the model of logarithmic normal random variables to describe crack propagation processes, a reliability life curve is presented for the structures with multiple cracks under corrosive environment, by considering the influences of the air during corrosion flight and the randomicity of crack propagation. 通过综合考虑空中飞行腐蚀和裂纹扩展随机性的影响,采用对数正态随机变量模型描述裂纹扩展过程,得到可靠度寿命曲线。
And the fatigue damage process is gradually from a initial chaotic state, to an independent random state at the transition of the micro-structural short crack regime and PSC, and then, to a historic dependent random state in PSC regime of fatigue damage. 疲劳损伤是一个由初始混沌状态演化到MSC与PSC两阶段交界处独立无关的随机状态,然后到史相关随机状态的过程。
Probabilistic model of random-long fatigue crack propagation rates 随机疲劳长裂纹扩展率的新概率模型
Effect of random load profile simulated by envelope method on crack propagation 包络线法模拟随机载荷对裂纹扩展的影响
Estimation of Fatigue Life of Submarine Pressure Hulls Using Random Model of Crack Propagation 用裂纹扩展随机模型估算潜艇耐压壳体的疲劳寿命
This paper, resolves the injecting parameters of ponding the cracked rocks using imitate continuous medium, Darcy law and random simulate of rocks 'crack network. 应用拟连续介质、Darcy定律和岩体裂隙网络的随机模拟对裂隙岩体堵水的注浆参数进行了解算。
Effect of high load rate and occurrence in random loading on fatigue crack growth 高载比和高载出现频率对随机加载疲劳裂纹扩展行为的影响
The random crack is used to simulate natural crack and it has a certain average width, standard deviation and correlation coefficient. 随机单裂隙符合天然裂隙的情况,具有一定的平均宽度、标准差和相关系数。
This kind of damage on the axle surface with random loading can produce crack, gradually extend to the critical size, and directly affect the service life of the axle. 这种损伤在车轴随机载荷下会萌生裂纹,并逐渐扩展到临界尺寸,这些情况都直接影响了车轴的使用寿命。
Then the device is used to measure the soil water characteristic curve of a man-made random crack. 然后利用该试验设备进行随机单裂隙土水特征曲线的测量。
The influences of fiber volume fraction, braiding angles and porosity on stiffness of three-dimensional and four-directional braided C/ C composites are analyzed. ( 4) The random crack core theory and model for predicting the longitudinal tensile strengths of unidirectional composites is built. 数值分析了三维四向编织C/C复合材料刚度随纤维体积分数、编织角、孔隙率等参数的变化规律。(4)建立了预测单向复合材料纵向拉伸强度的随机核理论与模型。