Elastic property determination of nanostructured W/Cu multilayer films on a flexible substrate

Wei He; Meidong Han; Shibin Wang; Philippe Goudeau; Eric Le Bourhis; Pierre Olivier Renault

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Elastic property determination of nanostructured W/Cu multilayer films on a flexible substrate

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cqvip:An experimental method for a single layer is extended to determine the elastic properties of nanostructured W/C u multilayers on a flexible substrate.The strain difference between the W/Cu-polyimide-W/Cu composite and the uncoated substrate,measured by dual digital image correlation,allows us to extract the effective Young's modulus of W/Cu multilayers(20 periods)equaling 216±13 GPa.Finite element method is then performed,which agrees well with the experiment and classical rule of mixture(ROM)theory demonstrating that the extension to multilayers is effective and reliable.The numerical analysis also interestingly shows that the strain difference is linearly related to the thickness ratio(W/Cu),periods and sublayer thickness,respectively.In contrast to ROM theory,this approach could potentially be used for the evaluation of properties and design of emerging/unknown functional multilayers,whether or not they are crystalline or amorphous.

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《力学学报：英文版》 |2019年第6期|1210-1216|共7页
作者
Wei He; Meidong Han; Shibin Wang; Philippe Goudeau; Eric Le Bourhis; Pierre Olivier Renault;
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作者单位

Department of Mechanics Tianjin University Tianjin 300350 China;

AML School of Aerospace Engineering Tsinghua University Beijing 100084 China;

School of Aircraft Engineering Nanchang Hangkong University Nanchang 330063 China;

Department of Physics and Mechanics of Materials Institute Pprime CNRS Poitiers University Futuroscope 86962 France;

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Elastic property determination of nanostructured W/Cu multilayer films on a flexible substrate

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