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Influence of Combination of Casimir Force and residual stress on the Behaviour of Micro-and Nano-Electromechanical Systems

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Chinese Physics Letters 2002年第6期19卷 832-834页

作者： Zheng Mao-Sheng, Zhou Gen-Shu State Key Laboratory for Mechanical Behavior of Materials Xi"an Jiaotong University

Casimir force and residual stresses actually appear in over-layers or films simultaneously. The study of the behaviour of micro- and nano-electromechanical systems in the presence of Casimir force and residual stress is of significance to the design of the relevant devices. We derive analytical expressions of the deflection of a bridge-shaped device under the mutual actions of Casimir force and residual stress in films. It is shown that the tensile residual stress enhances wavy behaviour of the deflection, while the compressive residual stress increases the deflection value and reduces the wavy behaviour.

关键词： tensile residual stress residual stress compressive residual stress Nanoelectromechanical Systems Deflection micro Casimir effect Electromechanical systems

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An Overview of Techniques for Measuring residual stress in Metal Matrix Composites

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Journal of Materials Science and Chemical Engineering 2022年第10期10卷 59-77页

作者： Qingping Wang Pakeeza Maryum Yuxin Liu School of Materials Science and Engineering Anhui University of Science and Technology Huainan China State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and Technology Huainan China

Measurement of residual stress is signiﬁcant to ensure safety, reliability and the life of composites, and currently has been a hot issue in scientiﬁc research. The fabrication processes such as machining, and heat treatment inherit either kind of residual stress which had either positive consequences or negative ones, for example, the fatigue limit of a component enhances by compressive stress, whereas corrosion resistance gets reduced by tensile stress. This study is aimed at a brief overview of the recent advancement in this field to help researchers in the in-depth study of measuring residual stress. It helps them in selecting the most appropriate techniques among destructive methods i.e., mainly Contour, ring core, deep hole-drilling method, and non-destructive techniques i.e., diffraction, ultrasonic method, depending on their requirements and applications. For each available technique, working methodology, physical limitations, and applications are discussed. At the end of this paper, future trends regarding an assessment of residual stress have been forecasted.

关键词： residual stress Destructive Methods Compressive residual stress tensile residual stress Non-Destructive Methods

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