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   extent of damage 在 材料科学 分类中 的翻译结果: 查询用时:0.173秒
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extent of damage
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    The model consists of a stress analysis and a failure analysis. The types and extent of damage in the woven composites are predicted by a failure analysis which including a set of proposed failure criteria and material degradation models.
    提出了相应的应力分析模型、失效分析模型、失效准则、刚度折减模型,计算出载荷与时间的关系和最后的破坏载荷。
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  extent of damage
The extent of damage appears to be concentration-dependent in which the delivery from slow-release drugs favours stricture formation in the caecal area.
      
The mechanism of damage was found to be similar for all the creep tests performed, but the distribution and extent of damage were found to be very sensitive to the test temperature.
      
The results of the study indicate that the geometric modifications after the nature and extent of damage significantly compared to conventional composite armor.
      
The nature and extent of damage for each modification and adhesive was estimated by postmortem inspection of the impacted armor and was compared to that obtained in unmodified armor of equal weight.
      
The value of the internal-state variable determines the extent of damage at a given location.
      
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Finite element approach was used to model the damage progression in laminated composites containingan open hole subjected to in-plane loading.In the damage constitutive relations of a composite lamina with ma-trix cracking,nonsymmetrical constraint effects of neighbouring plies was considered.The crack density as afunction of the stress of damage zone was constructed.The generalization of the damage constitutive relationswas made for any off-axis laminate by rotating coordinate in twice. Numerical calculations...

Finite element approach was used to model the damage progression in laminated composites containingan open hole subjected to in-plane loading.In the damage constitutive relations of a composite lamina with ma-trix cracking,nonsymmetrical constraint effects of neighbouring plies was considered.The crack density as afunction of the stress of damage zone was constructed.The generalization of the damage constitutive relationswas made for any off-axis laminate by rotating coordinate in twice. Numerical calculations were done andwere compared with experimental data.Based on the finite element analysis,the types and extent of damage inthe plate as a function of applied load can be obtained.The stiffness degradation of damaged lamina,the pro-gression of damage and the ultimate strength of the plate can be predicted.

本文应用有限元法模拟受拉含孔夏合材料层板损伤起始、累积直至破坏的过程。在模拟中引入了作者早些时建立的包含基体开裂层非对称约束影响的损伤本构关系,以及裂纹密度与损伤区应力关系函数等。本文给出损伤累积模拟方法并编制了程序,用该程序可以获得层板加载过程中各层的损伤状态、计算其刚度衰减和应力重分布以及最终破坏载荷。给出了数值模拟算例并与现有研究结果进行了比较。

Carbon is a kind of good conductance material of electricity. Electrical resistance variance of carbon fibers can reveal the style and extent of damage, which is an effective parameter to characterize damage of carbon fiber reinforced composites. It is a valuable technique to predict fatigue life for composites. In this paper, with electrical resistance as a damage index, a mathematical model is established to predict the fatigue life of CFRP laminates and verified by the fatigue test. It is...

Carbon is a kind of good conductance material of electricity. Electrical resistance variance of carbon fibers can reveal the style and extent of damage, which is an effective parameter to characterize damage of carbon fiber reinforced composites. It is a valuable technique to predict fatigue life for composites. In this paper, with electrical resistance as a damage index, a mathematical model is established to predict the fatigue life of CFRP laminates and verified by the fatigue test. It is proved that the test results agreed well with the model and the electrical resistance damage index is closely related to the fatigue process of materials, which can be divided into 3 stages during the damage process: descending stage; stable stage and destructive stage.

通过类比方式,以电阻变化作为复合材料的损伤参数,建立了用电阻损伤参数预报CFRP层板疲劳损伤的数学模型,通过拉-拉疲劳试验,对CFRP层板的疲劳损伤与疲劳寿命预报进行研究,建立了累积损伤中电阻与疲劳损伤状态之间的关系.研究表明,在疲劳损伤过程中,电阻损伤参数的变化同材料的疲劳损伤过程密切相关,电阻损伤规律可分为下降阶段、平稳阶段和破坏阶段;碳纤维材料的电阻变化能够反映纤维的损伤程度和破坏形式,可以作为表征复合材料纤维损伤的有效参数.

 
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