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中文摘要：
在这份报纸，一个修改砍落后模型被开发在热障碍涂层(TBC ) 计算表面裂缝密度。TBC 的机械性质也被测量到份量上估计他们的表面裂缝密度。声学的排放(AE ) 和数字图象关联方法被使用监视在张力的装载下面在 TBC 裂开的表面。结果证明从修改模型的计算表面裂缝密度与从实验获得了那一致。击碎 TBC 的过程的表面能被他们的 AE 特征和紧张进化区别。基于免除裂开和它的相应 AE 信号的精力的关联，一种线性关系在表面裂缝密度和 AE 参数之间被建立，与依赖于 TBC 的机械性质的斜坡。
英文摘要：
In this paper, a modified shear-lag model is developed to calculate the surface crack density in thermal barrier coatings（TBCs）. The mechanical properties of TBCs are also measured to quantitatively assess their surface crack density. Acoustic emission（AE） and digital image correlation methods are applied to monitor the surface cracking in TBCs under tensile loading. The results show that the calculated surface crack density from the modified model is in agreement with that obtained from experiments. The surface cracking process of TBCs can be discriminated by their AE characteristics and strain evolution. Based on the correlation of energy released from cracking and its corresponding AE signals, a linear relationship is built up between the surface crack density and AE parameters, with the slope being dependent on the mechanical properties of TBCs.
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