Evaluation of thin film adhesion to a compliant substrate by the analysis of progressive buckling in the fragmentation test
Evaluation of thin film adhesion to a compliant substrate by the analysis of progressive buckling in the fragmentation test
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DOI：
10.1016/j.tsf.2008.10.072
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发表时间：
2009-01-30
期刊：
影响因子：
2.1
通讯作者：
Leterrier, Y.
中科院分区：
文献类型：
--
作者：
Andersons, J.;Tarasovs, S.;Leterrier, Y.
本文根据碎裂试验中涂层屈曲模式的演变，估算了薄涂层/柔性基体系统的界面韧性。对于沉积在聚对苯二甲酸乙二醇酯膜上的SiOx涂层，通过实验确定作为施加的应变的函数的涂层厚度的线密度。建立了一个三维非线性有限元模型，模拟了单个窄钢带的翘曲变形过程。屈曲驱动脱层过程中释放的弹性能量由屈曲事件前后系统中的能量平衡得到。界面附着力和总能量释放率，其中包括在剥离过程中的基板中的塑性耗散，进行了评估。表观界面韧性，在屈曲开始时等于15 J/m（2）。随着应变而增加。这是暂时解释的概率特征的屈曲积累过程中，也反映在随机位置的屈曲演变的对数正态分布的屈曲间距在高应变。(C)2008 Elsevier B. V.保留所有权利。
The interface toughness of a thin coating/compliant substrate system is estimated based on the evolution Of coating buckle patterns in the fragmentation test. The linear density of coating buckles as a function of applied strain is determined experimentally for a SiOx coating deposited on a polyethylene terephthalate film. A three-dimensional non-linear finite element model is developed to simulate the process of buckle formation in a single narrow coating strip. The elastic energy released during buckling-driven delamination is obtained from the energy balance in the system before and after the buckling event. Both the interface adhesion and the total energy release rate, which includes the plastic dissipation in the substrate during debonding, are evaluated. The apparent interfacial toughness, equal to 15 J/m(2) at the onset of buckling. is found to increase with strain. This is tentatively explained by the probabilistic features of the buckle accumulation process, reflected also in the random locations of buckles evolving towards a log-normal distribution of buckle spacings at high strains. (C) 2008 Elsevier B.V. All rights reserved.