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首页> 外文期刊>International journal of mechanics and materials in design >Analysis Of Indentation-derived Effective Elastic Modulus Of Metal-ceramic Multilayers
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Analysis Of Indentation-derived Effective Elastic Modulus Of Metal-ceramic Multilayers

机译：金属陶瓷多层压痕有效弹性模量的分析

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A numerical study was undertaken to study the elastic property of metal-ceramic multilayered composites derived from indentation testing. The model system features alternating thin films of aluminum (Al) and silicon carbide (SiC), free from any effect due to the underlying substrate. The anisotropic composite elastic response was obtained by simulating overall loading of the multilayer structure. Finite element modeling of instrumented indentation was then employed to calculate the indentation-derived modulus using the unloading portion of the load-displacement curve. The results from indenting the homogenized composite (with the built-in multilayer property) and from indenting the real multilayers (with Al and SiC layers explicitly accounted for) were compared. It was found that an indentation depth beyond approximately 8-10 initial layer thicknesses is sufficient to yield a valid composite elastic response. The effective modulus thus obtained is representative of the out-of-plane modulus of the multilayer composite.
机译：进行了数值研究以研究由压痕测试得到的金属陶瓷多层复合材料的弹性。该模型系统具有交替的铝（Al）和碳化硅（SiC）薄膜，不受下层基板的影响。通过模拟多层结构的总载荷获得各向异性复合材料的弹性响应。然后，使用载荷-位移曲线的卸载部分，采用工具压痕的有限元建模来计算压痕派生的模量。比较了均质复合材料的压痕（具有内置的多层性能）和真实多层的压痕（显着考虑了Al和SiC层）的结果。已经发现，超过大约8-10个初始层厚度的压痕深度足以产生有效的复合弹性响应。如此获得的有效模量代表了多层复合材料的平面外模量。

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