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Search Publications by: Edward Garboczi (Assoc)

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Displaying 1 - 25 of 255

Three-dimensional characterization of particle size, shape, and internal porosity for Apollo 11 and Apollo 14 lunar regolith and JSC-1A lunar regolith soil simulant

June 8, 2024
Author(s)
Jay Goguen, Andrew Sharits, Ann Chiaramonti Debay, Thomas V. Lafarge, Edward Garboczi
Samples of soils collected by the Apollo 11 mission (10084) and the Apollo 14 mission (14163) were obtained from the NASA CAPTEM program. The particle size, shape, and internal porosity were characterized in three dimensions (3D) using a combination of X

Spherical harmonic reconstruction and preferred parameter research of 3D morphology of manufactured aggregate with different particle sizes

May 23, 2024
Author(s)
Edward Garboczi, Peng Gao, Juan Wu, Peiyun Qiu, Jingzhe Li, Hongjie Liu, Zhiwei Qian, Jiangziong Wei, Qijun Yu
The spherical harmonic (SH) series have been widely used in recent years to reconstruct three-dimensional (3D) particle shape for reducing the memory requirements of morphological data and facilitating the calculation of various particle shape parameters

Investigation of melt pool dynamics and solidification microstructures of laser melted Ti-6Al-4V powder using X-ray synchrotron imaging

April 10, 2024
Author(s)
Nicholas Derimow, Madelyn Madrigal-Camacho, Orion Kafka, Jake Benzing, Edward Garboczi, Samuel J. Clark, Suveen Mathaudhu, Nik Hrabe
Titanium alloy (Ti-6Al-4V) is widely used in additive manufacturing (AM) industry. However, as laser powder-bed fusion (PBF-L) additive manufacturing (AM) advances towards reliable production of titanium parts, a thorough understanding of the process

Electrosteric control of the aggregation and yielding behavior of concentrated portlandite suspensions

June 13, 2023
Author(s)
Sharu Kandy, Mathieu Bauchy, Gaurav Sant, Aditya Kumar, Narayanan Neithalath, Samanvaya Srivastava, Torben Gaedt, Edward Garboczi
Portlandite (calcium hydroxide: CH: Ca(OH)2) suspensions aggregate spontaneously and form percolated fractal aggregate networks when dispersed in water. As a result, the yield stress and viscosity of portlandite suspensions diverge at low particle loadings

Pore Formation Driven by Particle Impact in Laser, Powder-blown Directed Energy Deposition

May 26, 2023
Author(s)
Edward Garboczi, Newell Moser, Samantha Webster, Kornel Ehmann, Jian Cao, Kamel Fezzaa, Tao Sun
Material manufactured by laser, powder-blown directed energy deposition often contains residual pores, which can be detrimental to the strength and fatigue life of a part. We uncover a new kind of pore formation that is driven by powder particle impact

Multiscale Green's functions for modeling graphene and other Xenes

January 27, 2023
Author(s)
Vinod Tewary, Edward Garboczi
We give a review of the multiscale Green's function method for modeling modern two-dimensional nanomaterials such as graphene and other Xenes. The method is applicable to materials at different space and time scales and is computationally efficient. This

X-ray computed tomography analysis of pore deformation in IN718 made with directed energy deposition via in-situ tensile testing

August 28, 2022
Author(s)
Orion Kafka, Cheng Yu, Puikei Cheng, Sarah Wolff, Jennifer Bennett, Edward Garboczi, Jian Cao, Xianghui Xiao, Wing Kam Liu
Directed energy deposition (DED) is a metal additive manufacturing technique often used for larger-scale components and part repair. It can result in material performance that differs from conventionally processed metal. This work studies spatial and

Off-spec fly ash-based lightweight aggregate properties and their influence on the fresh, mechanical, and hydration properties of lightweight concrete: A comparative study

August 1, 2022
Author(s)
Edward Garboczi, Mohammad Balapour, Mohammad Khaneghahi, Yick Hsuan, Diana Hun, Yaghoob Farnam
In this study, an off-spec fly ash-based spherical lightweight aggregate (LWA), designated SPoRA, was manufactured through a pilot-scale production and its engineering properties, including specific gravity, dry rodded unit weight, water absorption

Ultrafast stiffening of concentrated thermoresponsive polymer-mineral suspensions

July 21, 2022
Author(s)
Edward Garboczi, Sharu Kandy, Iman Mehdipour, Narayanan Neithalath, Aditya Kumar, Mathieu Bauchy, Samanvaya Srivastava, Torben Gaedt, Gaurav Sant
Extrusion-based 3D printing with rapidly hardening polymeric materials is capable of building almost any conceivable structure. However, concrete, one of the most widely used materials for large-scale structural components, is generally based on inorganic

Density Driven Damage Mechanics (D3-M) Model for Concrete I: mechanical damage

July 6, 2022
Author(s)
Pavitra Murrua, Christa Torrence, Zachary Grasley, KR Rajagopal, P Alagappan, Edward Garboczi
Damage in concrete has been modeled using various approaches such as fracture mechanics, continuum damage mechanics and failure envelope theories. This study proposes a new theory to model damage in concrete that addresses the limitations associated with

Print Fidelity Metrics for Additive Manufacturing of Cement-based Materials

March 24, 2022
Author(s)
Edward Garboczi, Newell Moser, Joseph Biernacki, Hajar Afarani, Ebrahim Esfahani
Additively manufactured cement-based structures for infrastructure applications suffer from in-construction shape deformations, which are a strong function of process conditions and the rheology of the printing material (cement paste, mortar, or concrete)

Interface History on Strain Field Evolution in Epoxy Resins

January 21, 2022
Author(s)
Edward Garboczi, Newell Moser, Jena McCollum, Jared Strutton, Abby Jennings, Brandon Runnels
To determine the viability of digital image correlation in the analysis of additively manufactured thermosets, we devised a testing method to examine the effect of interface history (i.e., time between interface formation and original material deposition)

A Comparison of Particle Size Distribution and Morphology Data acquired using Lab-based and Commercially Available Techniques: Application to Stainless Steel Powder

November 17, 2021
Author(s)
Justin Whiting, Edward Garboczi, Vipin Tondare, John Henry J. Scott, Alkan Donmez, Shawn P. Moylan
The particle size distribution (PSD) and particlemorphology ofmetal powders undoubtedly affects the quality of parts produced by additivemanufacturing (AM). It is, therefore, crucial to accurately knowthe PSD and morphology of these powders. There exist