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Internal stress analysis for single and multilayered coating systems using the boundary element method

机译:使用边界元法分析单层和多层涂层系统的内部应力

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摘要

Various thin-coating films are designed and utilized for industrial applications to improve machining performance due to better temperature and wear resistant properties than their substrate counterparts. However, the widespread experimental research on thin coatings underlies a general lack of modeling efforts, which can accurately and efficiently predict the coating and thin film performance. In this paper, the boundary element method (BEM) for 2D elastostatic problems is studied for the analysis of single and multilayered coating systems. The nearly singular integrals, which is the primary obstacle associated with the BEM formulations, are dealt efficiently by using a general nonlinear transformation technique. For the test problems studied, very promising results are obtained when the thickness of coated layers is in the orders of 1.0E-6 to 1.0E-9, which is sufficient for modeling most coated systems in the micro- or nano-scales.
机译:设计了各种薄膜,并将其用于工业应用,以提高加工性能,因为它们的温度和耐磨性优于基材。但是,对薄涂层的广泛实验研究导致普遍缺乏建模工作,因为建模工作无法准确有效地预测涂层和薄膜的性能。在本文中,研究了用于二维弹性静力学问题的边界元方法(BEM),用于分析单层和多层涂层系统。近似奇异积分是与BEM公式相关的主要障碍,可以通过使用常规的非线性变换技术有效地对其进行处理。对于所研究的测试问题,当涂层的厚度在1.0E-6至1.0E-9的数量级时,将获得非常可观的结果,这足以在微米或纳米级上模拟大多数涂层系统。

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