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The general thermodynamics of the system is formulated: It is shown that agreement with the second law of thermodynamics prevails if the coefficient of damage does not exceed unity.




 The electrochemical measurement was conducted on carbon steel samples coated with organic coatings.The coatings were induced holes with different diameters in order to simulate artificially the damage severity of the coatings in practice.A coefficient of damage severity of organic coating K p was put forward,and the relationship of K p and the parameters of the electrochemical equivalent circuit of the coating system was given,which could describe the damage severity of organic coatings.This... The electrochemical measurement was conducted on carbon steel samples coated with organic coatings.The coatings were induced holes with different diameters in order to simulate artificially the damage severity of the coatings in practice.A coefficient of damage severity of organic coating K p was put forward,and the relationship of K p and the parameters of the electrochemical equivalent circuit of the coating system was given,which could describe the damage severity of organic coatings.This paper offered a theoretic fundamental for designing instruments for field monitoring.Furthermore,the electrochemical impedance spectroscopy of organic coatings with different damage severities was measured and analyzed.  碳钢试片表面模拟有机涂层不同程度的破损状态 ,在NaCl溶液中进行了电化学测试 .提出了破损程度系数Kp,建立了Kp 与涂层体系电化学等效电路参数之间的函数关系 ,可用来判辨有机涂层的破损程度 ,为现场检测仪器的研制提供了理论依据 .同时还测定了有机涂层不同破损程度的电化学阻抗谱 ,分析了谱图特征 .  Nonwoven geotextiles are widely used in subgrade and pavement drainage and reinforcement on account of its specific net structure and well mechanical behavior.Initial damage and high porosity are caused by the needlepunching technice,so the theory of damage mechanics can be used in the study of its mechanical behaviors.This paper lists the following contents in the case of uniaxial tensile stress:elastoplastic damage variable and evolvement equations,function equations of damage strain,damage constructive... Nonwoven geotextiles are widely used in subgrade and pavement drainage and reinforcement on account of its specific net structure and well mechanical behavior.Initial damage and high porosity are caused by the needlepunching technice,so the theory of damage mechanics can be used in the study of its mechanical behaviors.This paper lists the following contents in the case of uniaxial tensile stress:elastoplastic damage variable and evolvement equations,function equations of damage strain,damage constructive equations and determining coefficient of damage strength.Some examples are also presented.  非织造土工织物由于其特有的薄层网状结构及良好的力学性状 ,在路基路面排水及补强等工程中得到了广泛的应用。但生产过程中的针刺工艺使它同时也受到初始损伤及产生高的孔隙率。因此可应用损伤力学理论来研究非织造土工织物的力学性状  This paper provides the quantitative coefficient of damage corresponding to scene examined damage state on the neoteric buildings according to the degree of damage on the buildings and offers the method that the coefficient of damage is applied to quantitatively evaluate the macroscopic damage on the buildings. The study is based on damage mechanics analysis integrating code for appraisement of existing buildings in terms of the characteristic of the neoteric protective buildings... This paper provides the quantitative coefficient of damage corresponding to scene examined damage state on the neoteric buildings according to the degree of damage on the buildings and offers the method that the coefficient of damage is applied to quantitatively evaluate the macroscopic damage on the buildings. The study is based on damage mechanics analysis integrating code for appraisement of existing buildings in terms of the characteristic of the neoteric protective buildings on the general building evaluation, and the qualitative and quantitative, subjective and objective relation are adequately reflected.  本文在一般建筑物定性评估的基础上,根据近代建筑的特点,基于损伤力学分析,结合现行鉴定标准,按照建筑物损伤类别和损坏程度,将实测损伤状态与损伤系数一一对应起来,给出了近代建筑损伤评估体系的定量损伤参数,提出了用损伤系数来定量评估近代建筑的宏观损伤,充分反映了损伤评估中的定性与定量、主观与客观的关系。   << 更多相关文摘 
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