在建立裂纹扩展模型的时候,要考虑到裂纹长度对裂纹闭合效应的影响。
The simulating results have indicated that: the crack closure effect is obviously influenced by the fatigue crack length.
考虑平均风速的分布的影响,建立了随机荷载作用下的疲劳裂纹扩展模型。
Taking the distribution of mean wind velocity into account, the random crack growth model under variable amplitude load was established.
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。
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.
通过该模型,对钢化程度、玻璃厚度以及裂纹尺寸对玻璃强度和裂纹扩展的影响进行了讨论。
By using the model, the effects of tempering degree and glass thickness, as well as the crack growths are discussed.
用这些模型预测裂纹扩展角时,参数都归结为裂尖处的应力强度因子,而应力强度因子可以用有限元方法求得的。
The outlined models for estimation of crack extension angles rely purely on the stress intensity factors at the crack tip which can be determined by finite element procedures.
本文对谱载荷下预测疲劳裂纹扩展的各种模型作了综合介绍及评述。
This paper gives a comprehensive introduction and review of the models for predicting fatigue crack growth under spectrum loadings.
将数字图像处理煤体表面得到的初始损伤参数引入所建立的模型中,得到了相应受力状态下的裂纹起裂、扩展破坏过程。
Introducing the initial damage parameters of coal surface obtained by digital image processing in model, got the failure process corresponding stress state under the crack initiation and expansion.
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。
The present cohesive crack model based on the XFEM provides a useful way to simulate cracking in quasi-brittle materials.
本文利用弹-粘-塑性材料力学模型,对动态扩展裂纹尖端的指数奇异性和对数奇异性进行了渐近分析。
An elastic viscoplastic material model was adopted to the asymptotic analysis on power law and logarithmic singularity of dynamic growing crack tip.
本文给出二维疲劳裂纹扩展门槛值分布函数,建立二维应力—门槛值干涉模型。
A distribution function of two dimensional threshold is given for fatigue crack propagation. A two dimensional stress threshold interference model is set up.
本文给出二维疲劳裂纹扩展门槛值分布函数,建立二维应力—门槛值干涉模型。
A distribution function of two dimensional threshold is given for fatigue crack propagation.
采用弹粘塑性力学模型,对扩展裂纹尖端的应力和应变场进行了渐近分析。
An elastic_viscoplastic model is adopted to investigate asymptotically the stress and strain fields at a propagating crack_tip.
为了模拟重力坝在强震作用下的破坏过程,利用扩展有限元框架下的分离裂纹模型描述混凝土中的裂纹扩展。
A discrete crack model based on the extended finite element method (XFEM) was used to describe the nonlinear fracture of concrete gravity DAMS during earthquakes.
建立了概率模型表达短裂纹的扩展。
A probabilistic model is developed in this article to express the propagation of short cracks.
通过分析影响裂纹扩展寿命的多个随机因素,使用疲劳寿命模型,讨论了裂纹尺寸的计算方法。
By analyzing stochastic factors to influence the fatigue crack expandable life, fatigue life model was used and a calculation method for crack size was discussed.
为了研究富气输送对管道动态断裂的影响,建立了富气输送裂纹动态扩展管道模型。
Fractures in the rich gas transportation pipeline was analyzed based on a crack propagation pipeline model for rich gas transmission.
此模型首先给出了多个失效模式系统失效概率敏度与单夹杂裂纹扩展寿命失效概率敏度之间的关系;
The relationship of sensitivity for the system failure probability was firstly constructed between multiple failure modes and single failure mode.
弹性-粘塑性模型对反平面剪切扩展裂纹尖端的应力应变场进行了分析。
An elastic viscoplastic model is used to analyse stress and strain fields at the tip of a propagating crack under antiplane shear.
该模型数学表达式具有半理论、半经验性质,能较好地反映弹塑性疲劳裂纹扩展的物理特征。
The mathematical expression of this model is half theoretical and half empirical in nature and can well represent the physical characteristics of EPFC growth.
结合裂纹扩展率单一曲线模型对肘板裂纹扩展寿命进行了预报,预报结果与实验结果符合得较好,说明所采用的方法可行。
The fatigue life for bracket was predicted by way of the unique crack growth rate model incorporating the above SIF functions and the predicted results were in good agreement with the experiment data.
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.
建立了描述固体推进剂裂纹燃烧与扩展过程的数学模型。
A theoretical model describing the process of the crack combustion and propagation in solid propellant was formulated.
电导通裂纹模型中的静电场对裂纹尖端扩展的能量释放率不作贡献。
The energy release rate for crack propagation depends only on the stress intensity factor and the material constants.
将该解析元与有限元相结合,构成半解析的有限元法,可求解任意几何形状和载荷的基于线性内聚力模型的平面裂纹扩展问题。
The new analytical element can be implemented into FEM program systems to solve crack propagation for plane problems with arbitrary shapes and loads.
在对裂尖弹塑性应力应变分析的基础上,作者建立了疲劳裂纹扩展的应变累积模型。
Then, the strain accumulation model of EPFC growth is presented based on an analysis of elastic-plastic stress and strain at the crack-tip.
结果表明,该模型可很好地预测延性金属材料自裂纹萌生、扩展直至完全断裂的全过程。
It is shown that the proposed ductile fracture model can accurately and effectively predict the whole damage process of ductile metals including crack initiation, propagation and final fracture.
提出了含三相正交分布等尺寸微裂纹的准脆性材料稳定扩展的细观损伤演化模型。
The stable growth of cracks in a brittle material with three mutually perpendicular families of microcracks under proportional tensile loads was studied.
在确定性袭纹扩展模型的基础上,建立了疲劳裂纹扩展的随机模型。
A stochastic crack growth procedure which based on the determined crack growth model is presented in the paper.
通过模型分析了氧化铝基体和莫来石颗粒的应力状态及其对裂纹扩展的影响。由莫来石颗粒引入的基体拉应力使裂纹倾向于向晶内扩展。
The residual stresses in the alumina matrix and on the mullite particles as well as their effect on crack growth were analyzed by modelling.
结合粉末冶金材料含有非金属夹杂裂纹的特点,以裂纹扩展寿命可靠性分析的剩余强度模型与寿命干涉模型为基础,建立了多夹杂裂纹扩展的可靠性敏度分析模型。
Based on residual strength interference model and life interference model, a sensitivity analysis method on reliability was proposed for the fatigue crack growth life of powder metallurgy materials.
应用推荐