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Quantification of PVD Film Adhesion with Critical Shear Stress by Using Dynamic Simulation of the Inclined Impact Test

机译:使用斜冲击试验的动态模拟定量分析具有临界剪切应力的PVD薄膜的粘附力

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The film adhesion can be evaluated by the ratio of the tangential to normal film-substrate interface stiffness, as already described in recent publications. In the present paper, a new method is introduced for assessing the film adhesion based on the critical shear failure stress (SFLS). To predict SFLS in the coating-substrate region, a new 3D-FEM model was developed for the dynamic simulation of the inclined impact test, using the LS-DYNA software. This model enables the explicit determination of SFLS and also the relevant maximum equivalent stress developed in the film during the inclined impact test. The occurring SFLS in the coating-substrate interface affects the stresses resulting in the film during the operation of a coated component. In this way, they may lead to potential film material overloading and its cohesive failure.
机译:如在最近的出版物中已经描述的那样,可以通过切向与正常膜-基底界面刚度之比来评价膜的粘附性。本文介绍了一种基于临界剪切破坏应力(SFLS)评估薄膜附着力的新方法。为了预测涂层基材区域的SFLS,使用LS-DYNA软件开发了一种新的3D-FEM模型,用于动态模拟倾斜冲击试验。该模型可以明确确定SFLS,也可以确定在倾斜冲击试验过程中薄膜产生的相关最大等效应力。涂层-基材界面中出现的SFLS会影响在涂层组件操作过程中形成膜的应力。这样,它们可能导致潜在的薄膜材料过载及其内聚破坏。

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