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Dear friends, I want to share our recent work on the effects of adhesive and frictional contacts on the drumhead nanoindentation. Nanoindentation of suspended circular thin films, dubbed drumhead nanoindentation, is a widely adopted technique for characterizing the mechanical properties of micro- or nano-membranes, including atomically thin two-dimensional (2D) materials. This method involves suspending an ultrathin specimen over a circular microhole and applying a precise indenting force at the center using an atomic force microscope (AFM) probe.

Zifan Wang, Shuvrangsu Das, Akshay Joshi, Angkur JD Shaikeea, Vikram S Deshpande*

*Corresponding author: vsd20 [at] cam.ac.uk

Introduction

The AI-enabled adaptive version of Engineering Mechanics: Statics by Housner and Hudson is now available on AdaptiveBooks.org. It offers unparalleled flexibility that allows professors to:

https://www.sciengine.com/AMS/doi/10.1007/s10409-024-24010-x

Our analysis based on a simple model shows how adhesive friction breaks the size limit dictated by the fracture theory, which can offer insights into understanding the phenomena associated with adhesive friction in various fields, including gecko adhesion, cell adhesion, earthquake, etc.

https://doi.org/10.48550/arXiv.2403.05283

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Shifting from macroscopic to microscopic plasticity helps us understand mechanisms that can help us develop high-strength metallic materials. Things that prevent dislocation dynamics or generation, such as other dislocations and grain boundaries in polycrystalline materials, lead to higher strength.

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