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损伤值
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  damage value
    The degradation law for residual strength and the critical damage value are deduced from the present model.
    由损伤发展方程确定了材料剩余强度随损伤发展的衰减规律和临界损伤值
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    The critical A -par ameter value supplied the data to determine the critical creep damage value of m aterial and accurate limited condition for reliability assessment.
    临界参数值Acr的确定为临界损伤值的确定提供了基础 ,为高温构件的寿命预测、可靠性评估提供了准确的极限状态
短句来源
    By use of quantitative metallography technique, the critical A -paramet er at the tip of crack of HK40 was measured. Based on the relation between A -parameter a nd creep damage, the micro-critical creep damage value of material was obtained .
    以石化企业工业炉常用的炉管材料HK40为研究对象 ,采用定量金相技术 ,测定了裂纹尖端的A参数 ,应用A参数和损伤D的关系 ,得到材料的微观临界损伤值
短句来源
    The critical damage value supplied the condition with the life prediction of hi gh temperature construction member.
    高温构件材料的临界损伤值的测定为准确进行高温构件寿命预测提供了条件。
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    The critical values of the damage and the damage factor as well as the damage energy rate of 6 laminates considered has been measured and some interesting results are also obtained.
    测定了临界损伤值、临界损伤因子值和临界损伤能量率值,并得到一些有意义的结果。
短句来源
    The critical damage values that were obtained from A -parameter method, loc al da mage mechanics method and elastic modular measurement method were also compared.
    并比较了A参数方法与应用局部损伤力学理论方法以及测定高温构件材料的弹性模量方法获得的材料临界损伤值
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  damage value
The damage value in one direction determines the relative stiffness of rock mass in this direction.
      
The effects of the damage value and the relative distribution density of bonds are consistent.
      
The threshold salinity damage value for the vegetative yield of lettuce plants fed by 5 or 10 mM KNO3 was approximately 5 dSm-1 and the yield decreased by 6.5% per unit dS m-1 above the threshold.
      
A simple phenomenological model is proposed based on the FE results, and makes use of the initial damage value as well as the initial angular distribution of particles.
      
As shown in figure 4, the threshold damage value is not a constant as in conventional percolation, but is sensitive to details of the model.
      
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The critical damage parameter of the symmetrical laminates made of carbon-fiberreinforced composite was studied with the use of experimental technique in this work. The critical values of the damage and the damage factor as well as the damage energy rate of 6 laminates considered has been measured and some interesting results are also obtained.

这项工作用实验方法探讨了碳纤维增强复合材料对称层合板的临界损伤;测定了临界损伤值、临界损伤因子值和临界损伤能量率值,并得到一些有意义的结果。

The properties of impact resistance of glass/epoxy laminated composites for

用损伤力学分析方法评定了玻璃/环氧层合汽车板弹簧材料的抗冲击性能,由带测试装置的先进动态落锤冲击测试系统测定了冲击损伤的发展过程。通过对单试样和多试样的实验结果分析和研究,得到了该材料的冲击损伤变化规律和评定这种损伤的定量判据,包括材料的临界冲击损伤值D_C 损伤快速扩展的临界能量值G_C 以及损伤起始能量门槛值G_1等。研究的结果,为该材料的工程应用提供了可靠的设计选材和安全使用评定依据,也为复合材料的动态冲击损伤提供了一个新的和工程上能实用的定量评定方法。

In this pape, a nonlinear damage evolution equation is derived by the method of Continuum Damage Mechanics (CDM). This equation involves the complete coupling mechanism of stress and damage in the damage developing process. Based on the damage evolution equation, a complete nonlinear cumulative fatigue damage model (NCFDM) is obtained, which takes the nonlinear effect of damage cumulation in one loading cycle and between two loading cycle into account, and the available partial NCFDM is a special case. The degradation...

In this pape, a nonlinear damage evolution equation is derived by the method of Continuum Damage Mechanics (CDM). This equation involves the complete coupling mechanism of stress and damage in the damage developing process. Based on the damage evolution equation, a complete nonlinear cumulative fatigue damage model (NCFDM) is obtained, which takes the nonlinear effect of damage cumulation in one loading cycle and between two loading cycle into account, and the available partial NCFDM is a special case. The degradation law for residual strength and the critical damage value are deduced from the present model.

用连续介质损伤力学的方法推导得到了一个非线性的损伤发展方程,该方程计及了加载过程应力与损伤的完全耦合效应;又由损伤发展方程得到了一个计及加载循环周内和循环周间损伤积累非线性效应的完全非线性疲劳累积损伤模型,已有的部分非线性疲劳累积损伤模型成为它的特例。由损伤发展方程确定了材料剩余强度随损伤发展的衰减规律和临界损伤值

 
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