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Nano and Micromechanics Laboratory |
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Division of Engineering |
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Our theory predicts that with a shallow chemical etching the roughness with spatial frequency below a critical value grows while the roughness of higher frequency decays. This study provides a simple experimental method to measure stress in metals and ceramics. |
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In this project, we study effects of nano-µ size inclusions on the deformation characteristics of metal matrix composites. |
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In this project, nanometer-scale solid surface suspension and imprinting caused by high grafting density contacts and molecular interactions at the interface will be studied. |
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Mechanics of Multi-Scale Deformation in Nano- and Micro-Structural Metal-Matrix Composites |
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Surface Roughness Evolution Spectroscopy (SRES) |
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Nanomechanics of solid surface suspension and imprinting |
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Project List |
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A novel diamagnetic lateral force calibrator (D-LFC) has been developed recently to directly calibrate AFM lateral force output without the complex interpretation of the intrinsic quantities. Features: High accuracy; Easy; Low cost; Works for probes with any radii. |
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D-LFC: Lateral Force Calibration of AFM (LFM, FFM) |
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We have developed an inverse method, filed projection method (FPM), to measure the crack-tip cohesive zone laws from the results of either atomistic simulations or high resolution transmission electron microscopy. |
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Field Projection Methods (FPM) |
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In this project we investigate friction laws for single asperity contacts at nano- & micro- scales both theoretically and experimentally. |
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Scale Bridging in Nano and Micro Tribology |
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In this project, nano- & micro– size metal pyramids are fabricated and used for studying the scale effect in the strength of solid surfaces under contact loading. |
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Nano and Micro Mechanics of Surface Plasticity |
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Residual stresses in a complex structure are evaluated by an inverse finite element method utilizing the far-field displacements caused by sectioning the structure. The inverse method employs a partial polar decomposition of the stiffness matrix and associated regularizations. |
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Inverse Problems for Measuring Residual Stresses in Complex Structures |
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In this project, we study the scale-dependent transition from a mechanism-based unit process to a statistically controlled process, commonly encountered in modeling nano and micro mechanics of adhesion, friction and fragmentation with bottom-up approaches. |
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Disorder Effects in Nano and Micro Mechanics of Adhesion, Friction and Fragmentation |
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In this project, we study effects of a protein molecule, lubricin, in bio-tribology, using PFM experiments and modeling. In addition, we use a curvature interferometer to measure molecular and cellular surface interactions. |
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Mechanics of Molecular and Cellular Surface Interactions |
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Micromechanics of Pseudo-Single-Asperity friction |
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A new kind of frictional response, pseudo-single-asperity friction, has been studied using LFM experiments. Nanometer-scale roughness was found to play significant roles for small scale |