A5035864440- Advanced ceramic materials synthesis
- Aluminum Alloys Composites Properties
- Metallic Glasses and Amorphous Alloys
- Dental materials and restorations
- Additive Manufacturing and 3D Printing Technologies
- Advanced Surface Polishing Techniques
- Microstructure and mechanical properties
- Advanced materials and composites
- Cellular and Composite Structures
- Dental Implant Techniques and Outcomes
- X-ray Diffraction in Crystallography
- Metal and Thin Film Mechanics
- Concrete and Cement Materials Research
- Surface Treatment and Residual Stress
- Endodontics and Root Canal Treatments
- Polymer crystallization and properties
- High-Velocity Impact and Material Behavior
- Advanced X-ray Imaging Techniques
- Polymer Nanocomposites and Properties
- Photorefractive and Nonlinear Optics
- Semiconductor materials and devices
- Graphene research and applications
- Microstructure and Mechanical Properties of Steels
- Advanced X-ray and CT Imaging
- High Entropy Alloys Studies
Oklahoma State University
2011-2024
Oklahoma State University at Tulsa
2006-2023
Niagara University
2018
Oklahoma State University Oklahoma City
2005-2015
California Institute of Technology
1998-2008
Jet Propulsion Laboratory
2002-2005
Abstract Publications on polyethylene terephthalate (PET) continue to increase including the number of publications recycling. PET is a versatile material with ability be remade from its polymer state through mechanical recycling and even back original monomer advanced The scale PET's use affords continued research applications in improved new uses discarded clean convert it into many forms alternative materials are expanding an attempt complete circular or improve end life. As indicated...
Abstract Closed-cell foams in compression exhibit complex deformation characteristics that remain incompletely understood. In this paper the microstructural evolution of closed-cell polymethacrylimide foam was simulated undergoing elastic, compaction, and densification stages. The three-dimensional microstructure is determined using Micro-Computed Tomography (μ-CT), converted to material points for simulations point method (MPM). properties cell-walls are from nanoindentation on wall foam....
Real-time X-ray microtomography is used to study the underlying mechanisms of yielding and collapse a closed-cell metallic glass foam (see figure). Intercellular intracellular deformations upon compressive loading are examined in situ. A shear-stability analysis reveals that glassy foams obey same universal yield criterion as zero-temperature glasses, suggesting link between floppy modes buckling instabilities stochastic cellular structure. Supporting information for this article available...
The moderately high lateral RS gradients (on the order of tens MPa/μm) near shot peened notches in conjunction with shallow treatment depth (some hundreds microns) limit application far-field and/or resolution synchrotron diffraction residual stress measurement techniques. Recently proposed Focused Ion Beam – Scanning Elecron Microscope Digital Image Correlation (FIB-SEM-DIC) based micro mechanical relaxation methods for at micron scale became suitable techniques local evaluation stresses...
Abstract Purpose: To simulate coefficient of thermal expansion (CTE)‐generated stress fields in monolithic metal and ceramic crowns, CTE mismatch stresses between metal, alumina, or zirconia cores veneer layered crowns when cooled from high temperature processing. Materials Methods: A 3D computer‐aided design model a mandibular first molar crown was generated. Tooth preparation comprised reduction proximal walls by 1.5 mm occlusal surfaces 2.0 mm. Crown systems were (all‐porcelain, zirconia)...
Abstract Shot peening strongly increases the notch fatigue strength of metallic components. This benefit is mainly attributed to compressive residual stresses. In this paper, we address topic by performing bending tests on Al-7075-T651 samples carrying notches with different severity. Fatigue lives between 10 5 and 8 cycles have been explored. The stress field ahead has characterized experimental measurements numerical reconstruction incorporated into Crossland criterion combined critical...
A powder metallurgy route to the fabrication of metallic glass foam is introduced. The method involves consolidating blended with blowing agent particulates produce expandable precursors, capable yielding foams porosities as high 86%. are found inherit strength parent and be able deform heavily toward full densification absorbing amounts energy.