Abdullah Amin

• Doctor of Philosophy
• Professor (Assistant) at University of Dayton

High temperature superconductors such as MgB2 focus on conduction cooling of electromagnets that eliminates the use of liquid helium. With the recent advances in the strain sustainability of MgB2, a full body 1.5 T conduction cooled magnetic resonance imaging (MRI) magnet shows promise. In this article, a 36 filament MgB2 superconducting wire is co...

Challenge 3 of the 2022 NIST additive manufacturing benchmark (AM Bench) experiments asked modelers to submit predictions for solid cooling rate, liquid cooling rate, time above melt, and melt pool geometry for single and multiple track laser powder bed fusion process using moving lasers. An in-house developed A dditive M anufacturing C omputationa...

Challenge 3 of the 2022 NIST additive manufacturing benchmark (AM-Bench) experiments asked modelers to submit predictions for solid cooling rate, liquid cooling rate, time above melt, and melt pool geometry for single and multiple track laser powder bed fusion process using moving lasers. An in-house developed Additive Manufacturing Computational F...

We present a mechanistic data science (MDS) framework capable of building a composite knowledge database for composite materials design. The MDS framework systematically leverages data science to extract mechanistic knowledge from composite materials system. The composite response database is first generated for three matrix and four fiber combinat...

Deterministic computational modeling of laser powder bed fusion (LPBF) process fails to capture irregularities and roughness of the scan track, unless expensive powder-scale analysis is used. In this work we developed a stochastic computational modeling framework based on Markov Chain Monte Carlo (MCMC) capable of capturing the irregularities of LP...

This paper presents the concept of reduced order machine learning finite element (FE) method. In particular, we propose an example of such method, the proper generalized decomposition (PGD) reduced hierarchical deep-learning neural networks (HiDeNN), called HiDeNN-PGD. We described first the HiDeNN interface seamlessly with the current commercial a...

Functionally graded material (FGM) is a class of advanced materials, consisting of two (or more) different constituents, that possesses a continuously varying composition profile. With the advancement of nanotechnology, applications of FGMs have shifted from their conventional usage towards sophisticated micro and nanoscale electronics and energy c...

With the emergence of nanotechnology, the applications of Functionally graded materials have shifted from their conventional usage towards sophisticated micro and nanoscale electronics and energy conversion devices. Hence, in order to study nanoscale FGM structures in LAMMPS, this tool has been developed to generate FGM structure file according to...

Functionally graded material (FGM) is a class of advanced materials, consisting of two (or more) different constituents, that possesses a continuously varying composition profile. With the advancement of nanotechnology, applications of FGMs have shifted from their conventional usage towards sophisticated micro and nanoscale electronics and energy c...

In this report, we use first-principles calculations to study the methylammonium lead iodide (MAPI) perovskite interfaces with titanium dioxide (TiO2), zinc oxide (ZnO), and tin oxide (SnO2). Our study suggests that the binding energy of MAPI on SnO2 is weak compared to TiO2 and ZnO. However, we show that the strong binding to TiO2 and ZnO deproton...

Mechanical analysis of the stress and strains developed in the coils were calculated for a ten coil 1.5 T MRI magnet design with magnesium diboride (MgB2) wire protected with Coupling Loss Induced Quench (CLIQ). The temperature distribution inside the coils was first simulated in MATLAB to solve the governing heat and circuit equations. Simulations...

A diagnostic device is described herein that can be used to perform magneto-optical detection and discernment of crystals within a biofluid sample. A magnetic field can be applied by the diagnostic device in a direction relative to light traveling through the sample. The presence of a crystal can be determined based on the magneto-optical propertie...

Thin plate with an eccentric hole containing crack is a more common machine element in contrast to center hole crack element. After certain cycle during the plate's life time, the hole becomes elliptical in shape due to continuous loading applied to it. In this investigation, stress intensity factor (SIF) due to mode-I failure (KI) of such plate is...

Thin plate with an eccentric hole containing crack is a more common machine element in contrast to center hole crack element. In this investigation, stress intensity factor (SIF) due to mode–I failure (KI) of such plate is calculated with finite element analysis (FEA) as the plate experiences stress perpendicular to the crack direction. Displacemen...

Magnetic Resonance Imaging (MRI) background magnets are made from superconducting composite wires that are a metal matrix composite (MMC). Thermal and mechanical properties of the specific wire matrix must be known to optimize the wire configuration for MRI magnet designs. Computational analysis techniques based on numerical homogenization may prov...

Synopsis Control of strain development in an MgB₂ based full body MRI magnet is a challenge towards realizing a conduction cooled system. It is possible to alter the strain development in an MRI magnet by modifying the coil winding support conditions and by varying the winding stress on the wire across the layers. A multiscale multiphysi...

Conceptual designs of 1.5 and 3.0 T full-body magnetic resonance imaging (MRI) magnets using conduction cooled MgB2 superconductor are presented. The sizes, locations, and number of turns in the eight coil bundles are determined using optimization methods that minimize the amount of superconducting wire and produce magnetic fields with an inhomogen...

The active quench protection of a 1.5 T MgB2 conduction-cooled MRI magnet operating in persistent current mode is considered. An active quench protection system relies on the detection of the resistive voltage developed in the magnet, which is used to trigger the external energizing of quench heaters located on the surfaces of all ten coil bundles....

The winding of composite superconducting wire around a mandrel is one of the first stages of manufacturing processes of a superconducting magnet. Depending on the method of mechanical support conditions during winding, the strain development at the final stage in a superconducting magnet may vary significantly. Therefore, proper selection of the wi...

The effect of magnetoresistance, magnetothermal conductivity (MTC), and RRR value on the active quench protection of a persistent-mode conduction-cooled 1.5 T MgB <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> superconducting magnet is studied using numerical simulation. It is found that inclu...

A higher field (>1.5T) MRI magnet system is usually constructed with composite superconducting wire. Usually, modeling of the strain development of this magnet system requires approximation of the material property of composite MgB2 wire using the simple rule of mixture (ROM). The Rule of Mixture (ROM) is a straight forward and simple technique but...

Stanene, a graphene like two dimensional honeycomb structure of tin has attractive features in electronics application. In this study, we performed molecular dynamics (MD) simulations using Modified Embedded Atom Method (MEAM) potential to investigate mechanical properties of stanene. We studied the effect of temperature and strain rate on mechanic...

Advances in Magnesium diboride (MgB2) superconducting wire has led to the consideration of liquid helium (LHe) free, conduction cooled magnets for magnetic resonance imaging (MRI) systems. Conduction cooled magnet designs are enabled by the higher superconducting transition temperature, Tc=39K, of MgB2 which is about 20K higher than the widely used...

Aqueous droplet-based micro-gripper has been used for micro-assembly. However they cannot be used for high temperature and vacuum applications. Ionic liquids, organic salts that have a lower melting point temperature, appear suitable for droplet-based micro-gripping application in high temperature and vacuum environments because of their nonvolatil...