• 建立裂纹扩展模型时候,要考虑裂纹长度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.

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  • 考虑平均风速分布影响,建立随机荷载作用疲劳裂纹扩展模型

    Taking the distribution of mean wind velocity into account, the random crack growth model under variable amplitude load was established.

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  • 疲劳寿命计算采用断裂力学方法建立疲劳裂纹扩展模型失效模式极限状态方程

    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.

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  • 通过模型钢化程度玻璃厚度以及裂纹尺寸对玻璃强度和裂纹扩展影响进行了讨论。

    By using the model, the effects of tempering degree and glass thickness, as well as the crack growths are discussed.

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  • 用这些模型预测裂纹扩展时,参数都归结尖处应力强度因子应力强度因子可以有限元方法求得的。

    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.

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  • 本文载荷预测疲劳裂纹扩展各种模型综合介绍评述

    This paper gives a comprehensive introduction and review of the models for predicting fatigue crack growth under spectrum loadings.

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  • 数字图像处理煤体表面得到初始损伤参数引入建立的模型得到相应受力状态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.

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  • 基于扩展有限元法裂纹模型为准脆性材料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.

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  • 本文利用弹--塑性材料力学模型,对动态扩展裂纹尖端指数奇异对数奇异性进行分析

    An elastic viscoplastic material model was adopted to the asymptotic analysis on power law and logarithmic singularity of dynamic growing crack tip.

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  • 本文给出疲劳裂纹扩展门槛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.

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  • 本文给出疲劳裂纹扩展门槛分布函数,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.

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  • 采用弹粘塑性力学模型扩展裂纹尖端应力应变进行了渐近分析。

    An elastic_viscoplastic model is adopted to investigate asymptotically the stress and strain fields at a propagating crack_tip.

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  • 为了模拟重力坝强震作用下破坏过程利用扩展有限元框架下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.

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  • 建立概率模型表达裂纹扩展

    A probabilistic model is developed in this article to express the propagation of short cracks.

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  • 通过分析影响裂纹扩展寿命多个随机因素使用疲劳寿命模型讨论了裂纹尺寸计算方法

    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.

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  • 为了研究输送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.

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  • 模型首先给出了多个失效模式系统失效概率夹杂裂纹扩展寿命失效概率敏度之间关系

    The relationship of sensitivity for the system failure probability was firstly constructed between multiple failure modes and single failure mode.

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  • 弹性-粘塑性模型反平面剪切扩展裂纹尖端应力应变进行了分析。

    An elastic viscoplastic model is used to analyse stress and strain fields at the tip of a propagating crack under antiplane shear.

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  • 模型数学表达式具有理论、半经验性质较好地反映弹塑性疲劳裂纹扩展物理特征

    The mathematical expression of this model is half theoretical and half empirical in nature and can well represent the physical characteristics of EPFC growth.

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  • 结合裂纹扩展单一曲线模型肘板裂纹扩展寿命进行了预报,预报结果实验结果符合得较好,说明所采用方法可行。

    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.

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  • 通过观察裂纹开裂扩展路径,提出一个能用来估算Z型裂纹过载迟滞效应简单模型

    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.

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  • 建立了描述固体推进剂裂纹燃烧扩展过程数学模型

    A theoretical model describing the process of the crack combustion and propagation in solid propellant was formulated.

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  • 电导通裂纹模型中的静电场对裂纹尖端扩展能量释放不作贡献。

    The energy release rate for crack propagation depends only on the stress intensity factor and the material constants.

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  • 解析有限元相结合,构成半解析的有限元法,可求解任意几何形状载荷的基于线性内聚力模型平面裂纹扩展问题

    The new analytical element can be implemented into FEM program systems to solve crack propagation for plane problems with arbitrary shapes and loads.

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  • 尖弹塑性应力应变分析基础,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.

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  • 结果表明模型很好预测延性金属材料自裂纹萌生扩展直至完全断裂全过程

    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.

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  • 提出含三相正交分布等尺寸微裂纹准脆性材料稳定扩展细观损伤演化模型

    The stable growth of cracks in a brittle material with three mutually perpendicular families of microcracks under proportional tensile loads was studied.

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  • 确定性袭纹扩展模型基础,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.

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  • 通过模型分析了氧化铝基体来石颗粒应力状态及其裂纹扩展影响。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.

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  • 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剩余强度模型寿命干涉模型基础,建立了多夹杂裂纹扩展的可靠性度分析模型

    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.

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