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虚拟裂纹
相关语句
  virtual crack
     : J integral of different strength matched three point bend welded joint model containing longitudinal crack under plane strain condition is calculated using virtual crack extension method of MARC finite element program.
     采用 MARC有限元程序提供的虚拟裂纹扩展方法,计算了平面应变条件下不同强度匹配的含平行裂纹的三点弯曲焊接接头模型在不同载荷下的 J积分。
短句来源
     INVESTIGATION ON VIRTUAL CRACK EXTENSlON METHOD FOR J-INTEGRAL PARAMETER CALCULATIONS IN HETEROGENEOUS WELDED JOINT
     非均质焊接接头中J积分虚拟裂纹扩展计算方法研究
短句来源
     Based on the concept of virtual crack, the fatigue and fracture analysis of defected generator rotor are conducted, and the conclusion of unlimited life of the repaired generator rotor is gained.
     在虚拟裂纹概念的基础上,对山东某电厂发电机带缺陷转子在各种工况下进行疲劳强度校核和断裂 分析,得出了修复后的发电机转子具有无限寿命的结论,在工程上有重要指导意义。
短句来源
     Extended J-integral of different strength mis- matched welded joint containing transverse crack under plain stress condition an d longitudinal load was calculated using a Delorenzi virtual crack extension met hod of MARC finite element program.
     采用 MARC有限元程序提供的 Delorenzi虚拟裂纹扩展方法计算了平面应力条件下不同强度匹配的焊缝纵向受载的含横向裂纹的焊接接头在不同载荷的广义 J积分。
短句来源
     By using MARC finite element program, the dynamic fracture response of three-point-bend (TPB) sample deriving from low matching welded joint containing longitudinal crack is computed, and the fracture parameter of dynamic J -integral is calculated by adoption of virtual crack extension (VCE) method.
     采用MARC有限元程序 ,对含焊缝中心裂纹的低匹配焊接接头三点弯曲试样的动态断裂响应进行了计算模拟 ,并采用虚拟裂纹扩展方法计算了动态J积分断裂参量。
短句来源
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  fictitious crack
     Applicability of the Ordinary Approaches of Fracture Mechanics for Cementitious Materials Is Analysed with the Fictitious Crack Model
     用虚拟裂纹模型分析普通断裂力学方法对胶结材料的可用性
短句来源
     The strain intensity factor criterion is used to predict the direction and initiation of crack propagation, and the fictitious crack element method is proposed to simulate the extending of cracks.
     本文提出用虚拟裂纹单元及断裂力学准则(应变强度因子)追踪和模拟裂缝初始断裂、扩展并最终导致破坏的过程,给出一条逐段扩展的裂纹线.
短句来源
     Based on the analysis result obtained recently by the authors, the character of cohesive stress distribution is analyzed in the present paper. There is a cohesive stress singularity at the fictitious crack tip.
     通过得到的粘聚应力分布函数解析结果 ,对该粘聚力分布特征的分析得知 ,在基于断裂过程区之外用线弹性场的力学模型上 ,该粘聚力随距离虚拟裂纹尖点的靠近 ,仍具有平方根奇异性。
短句来源
     Since the fictitious crack mode (FCM) of mode Ⅱ has been derived, the shear fracture energy and the compression-shear fracture energy can be calculated.
     从而,提出了Ⅱ型虚拟裂纹模型(FCM). 并据此用有限元计算了属于Ⅱ型的剪切断裂能和压剪断裂能.
短句来源
     Based on the consideration of fictitious crack and the cementation force of ice in the frozen soil,the two dimensions model of frozen soil roadbed stability are proposed.
     根据车载下冻土路基受力特征,应用虚拟裂纹的概念,并考虑了冻土特有的冰体胶结力作用,提出了路基稳定性的二维模型。
短句来源
更多       
  “虚拟裂纹”译为未确定词的双语例句
     Singularity of Crack Cohesive Stress Distribution Along the Fracture Process Zone of Concrete
     混凝土断裂过程区的虚拟裂纹粘聚力奇异性
短句来源
     In this paper , the displacement field and the cracking propagation zone of Ⅰ - Ⅱ mixed model of concrete are measured by white light speckle technique.
     本文运用白光散斑技术分级测定了混凝土试样Ⅰ-Ⅱ复合型断裂的位移场,并对断裂过程区进行跟踪观察,探讨了断裂机理,据此建立起Ⅰ-Ⅱ复合型断裂虚拟裂纹模型.
短句来源
     Dynamic J -integral is path independent by use of VCE method, and inertia has little influence on the values of dynamic J -integral.
     用虚拟裂纹扩展方法计算的动态J积分与路径无关 ,惯性效应对动态J积分基本没有影响。
短句来源
     Based on the relationship between Energy release rate(G)and stress intensity factor(K). And then stress intensity factor(K) is got. Comparison of stress intensity factors(K) of between the calculated values and experimental values is made,showing that they are in good agreement.
     基于虚拟裂纹闭合法和Griffith势能法,得到相应载荷下的能量释放率G和应力强度因子K,并将计算结果与实验值进行了比较,获得了与实验一致的结果,表明该方法可用于镁合金构件断裂力学参量的数值分析和计算.
短句来源
     The energy release rate and the stress intensity factor for a 3-point bending concrete beam with multiple cracks were(evaluated) using the virtual (crack) closure technology(VCCT)and the finite element method(FEM). Quantitative comparisons between the numerical and theoretical values were made,and the results showed that they were in good agreement.
     基于虚拟裂纹闭合技术(VCCT),采用有限元分析方法对具有预制中心裂纹的三点弯曲混凝土梁的能量释放率G和应力强度因子K进行了分析计算,应力强度因子的计算结果和相关的理论结果具有较好的一致性,验证了该方法的有效性。
短句来源
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  virtual crack
The energy release rate distributions at the damage edges, calculated using the virtual crack closure technique, increased quite rapidly, particularly in the transverse direction after buckling became sufficient to increase the delamination.
      
The SERR is extracted from a finite element model using Irwin's virtual crack closure integral.
      
The concept of fracture mechanics has been used to calculate the strain energy release rate (SERR) as the adhesion failure propagates using the virtual crack closure technique (VCCT).
      
The total energy release rate used as the criteria of delamination growth was estimated with virtual crack closure technique (VCCT).
      
An expression for the driving force acting on the crack admitting nontangential virtual crack extensions is derived.
      
更多          
  fictitious crack
In order to investigate the crack propagation in quasi-brittle materials like rock, ceramic and concrete, Hillerborg and his co-researchers abstracted the fracture process zone in front of a stress free crack in terms of a "fictitious crack zone".
      
On the fictitious crack zone, cohesive stresses distribute following a given softening relationship of stress vs.
      
Semi-analytical finite element method for fictitious crack model in fracture mechanics of concrete
      
The new analytical element can be implemented into FEM program systems to solve fictitious crack propagation problems for concrete cracked plates with arbitrary shapes and loads.
      
A non-linear fracture mechanics model, the Fictitious Crack Model (FCM), is utilised for a theoretical study of the Compact Tension (CT) specimen.
      
更多          


Crack initiation and propagation in a porous composite (concrete) were analysed inthe light of its characteristic structual features.It is suggested that the front of a crackin conerete can be treated as a diffused zone of microcracks.This can be represented by afictitious crack which is able to transfer stress. An energy criterion governing the stabilityof a crack band and its propagation has been formulated.In order to, express the progres-sive deterioration caused by microcracks under mechanical solicitation...

Crack initiation and propagation in a porous composite (concrete) were analysed inthe light of its characteristic structual features.It is suggested that the front of a crackin conerete can be treated as a diffused zone of microcracks.This can be represented by afictitious crack which is able to transfer stress. An energy criterion governing the stabilityof a crack band and its propagation has been formulated.In order to, express the progres-sive deterioration caused by microcracks under mechanical solicitation a "damage-criterion"by coupling damage and elasticity is introduced.The non-microcracking zone of concretecan be defined by analyzing simultaneously the curves of deformations and acoustic emis-sion.

从结构特征出发,分析了多孔复合体的混凝土中的裂纹萌生和扩展过程。指出,在混凝土中的裂纹前端有一个微裂纹带,它可用一个起着应力传递作用的虚拟裂纹来表征。并且,提出了控制裂纹带的稳定或扩展的能量判据方程。为了描述微裂纹处由于受力状态所导致的逐步退化,引用了以损伤和弹性行为相联系的“损伤判据”。借助于形变和声发射同步的分析曲线,可确定混凝土中的无微裂纹区。

Crack propagation in concrete dams may be analysed with numerical or experimental methods. The tendency of crack due to external forces or thermal loads can be evaluated based on different criteria. In this paper the strain intensity factor criterion was used to predict the direction and initiation of crack development, and the fictitious crack element method was proposed to simulate the extending of crack. The results of finite element analysis are in good agreement with the experiment data.

混凝土建筑物中的裂纹扩展追踪计算是确定结构安全度的重要手段。本文提出用虚拟裂纹单元及断裂力学准则(应变强度因子)追踪和模拟裂缝初始断裂、扩展并最终导致破坏的过程,给出一条逐段扩展的裂纹线,本方法计算结果与某些混凝土坝实测资料及模型试验结果吻合较好。

Crack propagation in concrete darns may be analysed with numerical or experimental methods.The tendency of crack due to external forces or thermal loads can be evaluated based on different criteria.In this paper the strain intensity factor criterion was used to predict the direction and initiation of crack development,and the fictitious crack element method was proposed to simulate the extending of crack.The results of finite element analysis are in good agreement with the experiment data.

混凝土建筑物中的裂纹扩展追踪计算是确定结构安全度的重要手段。本文提出用虚拟裂纹单元及断裂力学准则(应变强度因子)追踪和模拟裂缝初始断裂、扩展并最终导致破坏的过程,给出一条逐段扩展的裂纹线,本方法计算结果与某些混凝土坝实测资料及模型试验结果吻合较好。

 
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