Martin Baltazar | Auburn University (original) (raw)
Thesis Chapters by Martin Baltazar
US Patent 11325152, 2022
A vessel has a lumen defined at least in part by a wall . The wall has an interior surface facin... more A vessel has a lumen defined at least in part by a wall . The
wall has an interior surface facing the lumen , an outer
surface , and a plasma - enhanced chemical vapor deposition
( PECVD ) coating set supported by the wall . The PECVD
coating set comprises a water barrier coating or layer having
a water contact angle from 80 to 180 degrees , applied using
a precursor comprising at least one of a saturated or unsatu
rated fluorocarbon precursor having from 1 to 6 carbon
atoms and a saturated or unsaturated hydrocarbon having
from 1 to 6 carbon atoms . Optionally , the coating set
includes an SiOx gas barrier coating or layer from 2 to 1000
nm thick , in which x is from 1.5 to 2.9 as measured by X - ray
photoelectron spectroscopy ( XPS ) , and optionally other
related coatings
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WIPO Patent, 2020
Disclosed are polymer vials and injection stretch blow molding methods for making the same. A pol... more Disclosed are polymer vials and injection stretch blow molding methods for making the same. A polymer vial has a base having a base surface area and a sidewall extending up from the base. The base and sidewall define an interior configured to house product, the sidewall narrowing at an upper section of the vial to form a neck leading to an opening that provides access to the interior. The vial is optionally round and symmetrical about a central axis, a lower portion of the sidewall including a first surface that is outwardly curved along a first radius having an imaginary center positioned within the vial. The base is positioned below the first surface and is substantially flat such that at least 80% of the base surface area has a standing base surface occupying a single plane. [Continued on next page]
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WIPO Patent, 2019
A vessel has a lumen defined at least in part by a wall. The wall has an interior surface facing ... more A vessel has a lumen defined at least in part by a wall. The wall has an interior surface facing the lumen, an outer surface, and a plasma-enhanced chemical vapor deposition (PECVD) coating set supported by the wall. The PECVD coating set comprises a water barrier coating or layer having a water contact angle from 80 to 180 degrees, applied using a precursor comprising at least one of a saturated or unsaturated fluorocarbon precursor having from 1 to 6 carbon atoms and a saturated or unsaturated hydrocarbon having from 1 to 6 carbon atoms. Optionally, the coating set includes an SiOx gas barrier coating or layer from 2 to 1000 nm thick, in which x is from 1.5 to 2.9 as measured by x-ray photoelectron spectroscopy (XPS), and optionally other related coatings.
(FR)
L'invention concerne un récipient qui a une lumière définie au moins en partie par une paroi. La paroi a une surface intérieure faisant face à la lumière, une surface extérieure, et un ensemble de revêtement par dépôt chimique en phase vapeur assisté par plasma (PECVD) supporté par la paroi. L'ensemble de revêtement par PECVD comprend un revêtement ou une couche faisant barrière à l'eau ayant un angle de contact avec l'eau de 80 à 180 degrés, appliqué en utilisant un précurseur comprenant au moins l'un parmi un précurseur fluorocarboné saturé ou insaturé contenant de 1 à 6 atomes de carbone et un hydrocarbure saturé ou insaturé contenant de 1 à 6 atomes de carbone. Facultativement, l'ensemble de revêtement comprend un revêtement ou une couche faisant barrière aux gaz SiOx de 2 à 1000 nm d'épaisseur, x étant compris entre 1,5 et 2,9 selon une mesure par spectroscopie photoélectronique à rayons x (XPS), et éventuellement d'autres revêtements apparentés.
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The possibility and feasibility of experimental detection of localized defects in tubes using las... more The possibility and feasibility of experimental detection of localized defects in tubes
using laser-induced ultrasonic wave approach through Thermo Acousto Photonic Non
Destructive Evaluation (TAP-NDE) and Signal processing through wavelet transform is
examined in this research. Guided waves in cylindrical surfaces provide solutions for
detection of different defects in the material. Several experiments were conducted to this
respect. Wave propagation in both axial and circumferential directions was studied. The
dispersive wave propagation of ultrasonic waves in hollow cylinders has been
investigated experimentally, primarily for use in non-contact and nondestructive
inspections of pipes and tubes. The laser ultrasonic waves propagated in cylindrical
waveguides are particularly attractive because of their unique characteristics in the
applications of nondestructive evaluation (NDE). Contrary to studies making use of only
axially symmetric guided waves in hollow cylinders, here are analyzed also nonaxisymmetric
waves. The analysis of data is made by using the Gabor wavelet transform.
The capability of modeling the guided wave dispersion in hollow cylinders is used in
developing guided wave experimental techniques for flaw detection. Good agreement
was obtained when comparing the dispersion spectra between theory and
experimentation. Measurement of group velocities of guided waves, which are obtained
directly from the wavelet transform coefficients, can be used to determine allocation and
sizing of flaws.
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Papers by Martin Baltazar
The International Journal of Advanced Manufacturing Technology, Sep 9, 2015
A numerical study of the energy absorption characteristics of structural steel is presented, by i... more A numerical study of the energy absorption characteristics of structural steel is presented, by implementing geometric imperfections. The geometric discontinuities were placed at half height of the structures in two opposite walls. In this case, different curved shapes discontinuities and quadrilaterals were evaluated. The shape and aspect ratio of the discontinuity modify the behavior of the structure even though the analyzed shapes have the same area value. The best performance in energy absorption of 12.54 % compared to a shape with no discontinuities was obtained with the implementation of a curved form initiator. Finally, and with the same comparison pattern, the value of the peak load was reduced up to 22.13 % by using the diamond-shaped discontinuities.
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Journal of Mechanical Science and Technology, Sep 1, 2012
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Proceedings of SPIE, Feb 14, 2005
ABSTRACT
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Journal of Mechanical Science and Technology, 2014
ABSTRACT
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6th International Energy Conversion Engineering Conference (IECEC), Jun 15, 2008
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Experimental Techniques, Feb 25, 2011
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長岡大学地域研究センター, Oct 1, 2002
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SLAS TECHNOLOGY: Translating Life Sciences Innovation, 2020
SiO2 Medical Products, Inc. developed hybrid blood collection tubes (BCTs) that combine the break... more SiO2 Medical Products, Inc. developed hybrid blood collection tubes (BCTs) that combine the breakage resistance of plastic and a shelf life approaching that of glass. These blended attributes provide improved BCT safety and reliability for patients and clinical workers. A shelf life of at least 2 y with less than 10% draw volume variation was demonstrated on evacuated hybrid BCTs, which is approximately 7 times longer than standard polyethylene terephthalate (PET) BCTs. This translates into more consistent and reliable blood draw volumes over a longer shelf life. The moisture vapor barrier of hybrid BCTs is 5 times lower than that of PET BCTs, which significantly reduces preservative evaporation over their shelf life. As a result, the risk of preservative gelation and alteration to the blood-to-preservative ratio mix is practically eliminated. Cyclic olefin polymer (COP) exhibits superior impact resistance to breakage because of its high ductility and impact strength and is not infl...
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Eighth International Symposium on Laser Metrology, 2005
ABSTRACT
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SPIE Proceedings, 2006
ABSTRACT
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Journal of Mechanical Science and Technology, 2012
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Journal of Mechanical Science and Technology, 2014
ABSTRACT
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Supplemental material, Weikart_SLAS_Technology_Supplemental_Material_1-2_Response_to_Reviewers2 f... more Supplemental material, Weikart_SLAS_Technology_Supplemental_Material_1-2_Response_to_Reviewers2 for Hybrid Blood Collection Tubes: Combining the Best Attributes of Glass and Plastic for Safety and Shelf life by Christopher M. Weikart, Adam P. Breeland, Matt S. Wills and Martin E. Baltazar-Lopez in SLAS Technology
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US Patent 11325152, 2022
A vessel has a lumen defined at least in part by a wall . The wall has an interior surface facin... more A vessel has a lumen defined at least in part by a wall . The
wall has an interior surface facing the lumen , an outer
surface , and a plasma - enhanced chemical vapor deposition
( PECVD ) coating set supported by the wall . The PECVD
coating set comprises a water barrier coating or layer having
a water contact angle from 80 to 180 degrees , applied using
a precursor comprising at least one of a saturated or unsatu
rated fluorocarbon precursor having from 1 to 6 carbon
atoms and a saturated or unsaturated hydrocarbon having
from 1 to 6 carbon atoms . Optionally , the coating set
includes an SiOx gas barrier coating or layer from 2 to 1000
nm thick , in which x is from 1.5 to 2.9 as measured by X - ray
photoelectron spectroscopy ( XPS ) , and optionally other
related coatings
Bookmarks Related papers MentionsView impact
WIPO Patent, 2020
Disclosed are polymer vials and injection stretch blow molding methods for making the same. A pol... more Disclosed are polymer vials and injection stretch blow molding methods for making the same. A polymer vial has a base having a base surface area and a sidewall extending up from the base. The base and sidewall define an interior configured to house product, the sidewall narrowing at an upper section of the vial to form a neck leading to an opening that provides access to the interior. The vial is optionally round and symmetrical about a central axis, a lower portion of the sidewall including a first surface that is outwardly curved along a first radius having an imaginary center positioned within the vial. The base is positioned below the first surface and is substantially flat such that at least 80% of the base surface area has a standing base surface occupying a single plane. [Continued on next page]
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WIPO Patent, 2019
A vessel has a lumen defined at least in part by a wall. The wall has an interior surface facing ... more A vessel has a lumen defined at least in part by a wall. The wall has an interior surface facing the lumen, an outer surface, and a plasma-enhanced chemical vapor deposition (PECVD) coating set supported by the wall. The PECVD coating set comprises a water barrier coating or layer having a water contact angle from 80 to 180 degrees, applied using a precursor comprising at least one of a saturated or unsaturated fluorocarbon precursor having from 1 to 6 carbon atoms and a saturated or unsaturated hydrocarbon having from 1 to 6 carbon atoms. Optionally, the coating set includes an SiOx gas barrier coating or layer from 2 to 1000 nm thick, in which x is from 1.5 to 2.9 as measured by x-ray photoelectron spectroscopy (XPS), and optionally other related coatings.
(FR)
L'invention concerne un récipient qui a une lumière définie au moins en partie par une paroi. La paroi a une surface intérieure faisant face à la lumière, une surface extérieure, et un ensemble de revêtement par dépôt chimique en phase vapeur assisté par plasma (PECVD) supporté par la paroi. L'ensemble de revêtement par PECVD comprend un revêtement ou une couche faisant barrière à l'eau ayant un angle de contact avec l'eau de 80 à 180 degrés, appliqué en utilisant un précurseur comprenant au moins l'un parmi un précurseur fluorocarboné saturé ou insaturé contenant de 1 à 6 atomes de carbone et un hydrocarbure saturé ou insaturé contenant de 1 à 6 atomes de carbone. Facultativement, l'ensemble de revêtement comprend un revêtement ou une couche faisant barrière aux gaz SiOx de 2 à 1000 nm d'épaisseur, x étant compris entre 1,5 et 2,9 selon une mesure par spectroscopie photoélectronique à rayons x (XPS), et éventuellement d'autres revêtements apparentés.
Bookmarks Related papers MentionsView impact
The possibility and feasibility of experimental detection of localized defects in tubes using las... more The possibility and feasibility of experimental detection of localized defects in tubes
using laser-induced ultrasonic wave approach through Thermo Acousto Photonic Non
Destructive Evaluation (TAP-NDE) and Signal processing through wavelet transform is
examined in this research. Guided waves in cylindrical surfaces provide solutions for
detection of different defects in the material. Several experiments were conducted to this
respect. Wave propagation in both axial and circumferential directions was studied. The
dispersive wave propagation of ultrasonic waves in hollow cylinders has been
investigated experimentally, primarily for use in non-contact and nondestructive
inspections of pipes and tubes. The laser ultrasonic waves propagated in cylindrical
waveguides are particularly attractive because of their unique characteristics in the
applications of nondestructive evaluation (NDE). Contrary to studies making use of only
axially symmetric guided waves in hollow cylinders, here are analyzed also nonaxisymmetric
waves. The analysis of data is made by using the Gabor wavelet transform.
The capability of modeling the guided wave dispersion in hollow cylinders is used in
developing guided wave experimental techniques for flaw detection. Good agreement
was obtained when comparing the dispersion spectra between theory and
experimentation. Measurement of group velocities of guided waves, which are obtained
directly from the wavelet transform coefficients, can be used to determine allocation and
sizing of flaws.
Bookmarks Related papers MentionsView impact
The International Journal of Advanced Manufacturing Technology, Sep 9, 2015
A numerical study of the energy absorption characteristics of structural steel is presented, by i... more A numerical study of the energy absorption characteristics of structural steel is presented, by implementing geometric imperfections. The geometric discontinuities were placed at half height of the structures in two opposite walls. In this case, different curved shapes discontinuities and quadrilaterals were evaluated. The shape and aspect ratio of the discontinuity modify the behavior of the structure even though the analyzed shapes have the same area value. The best performance in energy absorption of 12.54 % compared to a shape with no discontinuities was obtained with the implementation of a curved form initiator. Finally, and with the same comparison pattern, the value of the peak load was reduced up to 22.13 % by using the diamond-shaped discontinuities.
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Journal of Mechanical Science and Technology, Sep 1, 2012
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Proceedings of SPIE, Feb 14, 2005
ABSTRACT
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Journal of Mechanical Science and Technology, 2014
ABSTRACT
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6th International Energy Conversion Engineering Conference (IECEC), Jun 15, 2008
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Experimental Techniques, Feb 25, 2011
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長岡大学地域研究センター, Oct 1, 2002
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SLAS TECHNOLOGY: Translating Life Sciences Innovation, 2020
SiO2 Medical Products, Inc. developed hybrid blood collection tubes (BCTs) that combine the break... more SiO2 Medical Products, Inc. developed hybrid blood collection tubes (BCTs) that combine the breakage resistance of plastic and a shelf life approaching that of glass. These blended attributes provide improved BCT safety and reliability for patients and clinical workers. A shelf life of at least 2 y with less than 10% draw volume variation was demonstrated on evacuated hybrid BCTs, which is approximately 7 times longer than standard polyethylene terephthalate (PET) BCTs. This translates into more consistent and reliable blood draw volumes over a longer shelf life. The moisture vapor barrier of hybrid BCTs is 5 times lower than that of PET BCTs, which significantly reduces preservative evaporation over their shelf life. As a result, the risk of preservative gelation and alteration to the blood-to-preservative ratio mix is practically eliminated. Cyclic olefin polymer (COP) exhibits superior impact resistance to breakage because of its high ductility and impact strength and is not infl...
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Eighth International Symposium on Laser Metrology, 2005
ABSTRACT
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SPIE Proceedings, 2006
ABSTRACT
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Journal of Mechanical Science and Technology, 2012
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Journal of Mechanical Science and Technology, 2014
ABSTRACT
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Supplemental material, Weikart_SLAS_Technology_Supplemental_Material_1-2_Response_to_Reviewers2 f... more Supplemental material, Weikart_SLAS_Technology_Supplemental_Material_1-2_Response_to_Reviewers2 for Hybrid Blood Collection Tubes: Combining the Best Attributes of Glass and Plastic for Safety and Shelf life by Christopher M. Weikart, Adam P. Breeland, Matt S. Wills and Martin E. Baltazar-Lopez in SLAS Technology
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International …, 2006
Page 1. Original Article Proceedings of Virtual Concept 2006 Playa Del Carmen, Mexico, November 2... more Page 1. Original Article Proceedings of Virtual Concept 2006 Playa Del Carmen, Mexico, November 26th December 1st, 2006 VC_InCo2006_P95 -1-Copyright of Virtual Concept Functionally efficient conceptual design and innovation tools ...
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ABSTRACT
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ABSTRACT
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7th International Energy Conversion Engineering Conference, 2009
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SEM Conference, 2003
The feasibility for the detection of localized defects in tubes using laser ultrasound is experim... more The feasibility for the detection of localized defects in tubes using laser ultrasound is experimentally investigated. Existing numerical methods for modeling guided waves on cylindrical surfaces have provided solutions for the detection of different defects in tubing; however, little attention has been given to address the experimental aspects of wave propagation in hollow cylinders. This is particularly so with non-axisymmetric wave motion. Here, dispersive wave propagation of ultrasonic waves in the walls of hollow cylinders are investigated experimentally, primarily for use in non-contact and nondestructive inspections of pipes and tubes. The laser ultrasonic waves propagated in cylindrical waveguides are particularly attractive because of their unique characteristics in the applications of quantitative nondestructive evaluation (QNDE). Contrary to studies making use of only axially symmetric guided waves in hollow cylinders, this paper describes non-axisymmetric waves and their dispersion as revealed by the Wavelet Transform. The capability of modeling the dispersion of guided waves in hollow cylinders is used in developing guided wave experimental techniques for flaw detection. Measurement of group velocities of guided waves and theoretical velocities are used to locate and size flaws.
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Plasma Science, ICOPS, 2008
The lunar resource utilization and processing of lunar materials, particularly surface rock drill... more The lunar resource utilization and processing of lunar materials, particularly surface rock drilling and excavation, will sometimes require high peak, low average power. One of the complications, specifically for excavation on the moon's surface, is that it would be prohibitive to carry large quantities of chemical explosives to the lunar surface. An attractive alternative method of surface blasting could incorporate the use of pulsed powered plasma blasting. Such a technique also allows easily adjusted explosive yield control for additional safety. The electrical power management design of particularly the high peak power transient loads will need to incorporate additional electrical storage devices such as capacitors. A Bernardes-Merryman (BM) capacitor bank topology was used to protect and drive our pulsed power system. As a result of using this BM scheme, neither capacitor bank is ever subjected to a negative polarity voltage swing eliminating the need for crowbar circuitry. This paper will discuss the design, construction, and performance of a prototype plasma blasting power system and blasting probes. In this system, a capacitor is charged over a long period of time at low current (power), then discharged in a very short pulse at very high current to break blocks of concrete or large rocks. Scalable prototypes of the plasma blasting probes for electrically powered pulsed plasma rock blasting were also designed and constructed. The blasting system is able to provide pressures well above the tensile strengths comparable to those of common rocks, i.e. granite (10-20 MPa), tuff (1-4 MPa) and concrete (7 MPa). The system was successfully tested by reducing concrete specimens into small rubble with blasting probe delivered net energy levels starting at 9 kJ and greater. Tests on concrete and granite rock test samples are reported.
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SEM Annual Conference, 2002
A technique feasible for inspecting pipes rapidly and non-destructively is presented. The current... more A technique feasible for inspecting pipes rapidly and non-destructively is presented. The current methods of detection other than image processing, are invasive in the sense that contact transducers are needed to initiate and obtain interrogating signals in the process of testing. There are techniques that use laser-generated ultrasound. However, the aspect of signal detection associated with these techniques is often realized by the use of contact transducers and thus invasive in nature. An alternative to the transducer-based methods is to employ non-contact and non-invasive guided wave techniques to characterize the location and sizing of defects in tubulars. One such laser-optic technique that has been successfully applied to the characterization of metallic and non-metallic materials of various types of geometry was employed to demonstrate the feasibility of real-time, non-contact inspection of tubulars. The technique consists of the application of Thermo-Acoustic-Photonic Non-Destructive Evaluation (TAP-NDE) using a pulsed laser as the generation source and an interferometric sensing system referred to as Fiber Tip Interferometer (FTI) to acquire the signals. It is noted that most of the non-contact and non-invasive techniques reported in the literature have been developed and applied to survey flat surfaces only. In this work, the generation and propagation of thermally induced broadband ultrasound in tubulars are experimentally studied and the detection of surface defects is facilitated by establishing the dispersion of the ultrasound using wavelets. Because wavelets are closely related to the concept of filterbank, the algorithm effective for pipe and tube inspection can thus be easily implemented into digital hardware for real-time field applications.
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3er. Congreso Internacional de Investigación CIPITECH, 2010
En este trabajo se analizó la influencia del ángulo de desbalance sobre los armónicos de la respu... more En este trabajo se analizó la influencia del ángulo de desbalance sobre los armónicos de la respuesta de un rotor fracturado. El rotor fue simulado mediante el método de elemento finito considerando al eje como flexible, es decir, con deflexión estática dominante sobre la vibración, lo que implica un comportamiento de abrir y cerrar de la fractura en cada revolución, conocido como respiro de fractura. La flexibilidad adicional a causa de la presencia de fractura se introdujo al sistema por medio del criterio de energía de deformación y, el respiro, mediante el concepto de línea de cierre de fractura. El análisis armónico de la respuesta se realizó mediante la transformada wavelet de Gabor para cuantificar la relación entre la posición del desbalance y el contenido espectral de la respuesta del rotor fracturado en velocidades subcríticas. Este criterio es presentado como una alternativa para la detección de fracturas en maquinaria en operación,
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Proceeedings of Virtual Concept, 2006
A design methodology founded on the research work done at the Institute for Innovation and Design... more A design methodology founded on the research work done at the Institute for Innovation and Design in Engineering, has been applied to enhance the ability to design and innovate of neophyte engineers at National Research and Technological Development Centre (CENIDET) in Mexico. This methodology is based on the cognitive skills of abstraction, critical parameter identification, and questioning in order to obtain a functionally efficient conceptual design. Besides of teaching the design process to novice designers, the methodology inspires in them a design philosophy which enables them to perform engineering effectively and innovatively in any area of specialty. Some examples of this design philosophy are presented.-However, by using a specific methodology, some times this idea of getting industrial expertise and industrial problems can be substituted for a solution of an everyday problem, based on the fact that not all the engineering problems come from industry, being this more accessible for students, nevertheless not less technically-challenging projects, and making these solutions of a real need a good starting point of their engineering design practice, some times those solutions have risen interest from industrial partners.
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CIINDET, 2008
Currently, potters in the State of Morelos doing the drying process of molds in shaded areas usin... more Currently, potters in the State of Morelos doing the
drying process of molds in shaded areas using
considerable time, through direct sunlight and using
energy waste furnaces. However, these processes
reduce the continuity of production, quality and shelf
life of the molds to expose them to temperatures over
55°C or in direct sunlight. Therefore, an agreement was
established CANACYNTRA-MORELOS-CENIDETSEP,
which found funding through the Government of
the State of Morelos-CONACYT, to carry out the
design and construction of a dryer molds that lengthen
the life of molds, used waste heat from ovens and solar
energy, easy reproduction and reduce the time and
movements during this critical part of the process. In
this work a methodology of evaluation of the dryer is
presented that allowed to detect opportunities to
improve their performance. It was found that the dryer
has a constant drying 0,05 and its time of drying was of
5,0 days. Also, it was found that the efficiency of solar
collectors limits the efficiency of the entire system.
Keywords: drying, dryer molds, design of a dryer
molds, construction of a dryer.
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II REUNION INTERNACIONAL (XI NACIONAL) DE INGENIERIA. ·MECAN I CA MEMO KIA II INTERNATIONAL MEETING (XI NATIONA.L) OF MECtlANICAL ENGINEERING PROCEEDINGS, 1996
Se ha diseñado y construido un "sistema para fotoelasticidad" que consiste en un polariscopio, un... more Se ha diseñado y construido un "sistema para fotoelasticidad" que consiste en un polariscopio, un marco de carga y un cortador de modelos fotoelasticos. Todo esto a un costo inferior con respecto a los equipos
comerciales. La fotoelasticidad nos revela el campo de esfuerzos actuando en el especimen sujeto a cargas de trabajo, con lo que se tiene la posibilidad de detector las zonas de concentracion de esfuerzos, es decir, se puede predecir. mediante estimacion cualitativa las zonas en donde se presentaran las fallas. Ademas mediante fotoelasticidad se pueden determinar las direcciones de Ins esfuerzos principales en cualquier punto de interes. Asi coma magnitudes de diferencias de esfuerzos principales.
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ASNT Conference, 2000
A laser-optics-based non-contact method for ultrasonic pipe inspection is described in this prese... more A laser-optics-based non-contact method for ultrasonic pipe inspection is described in this presentation. The method is the application of Thermo-Acoustic Photonic Non-Destructive Evaluation (TAP-NDE) techniques to the generation and detection of broadband ultrasound in tubulars. Using a pulsed laser as the generation source and an interferometric sensing system referred to as Fiber Tip Interferometer (FTI), inspection is performed in a non-contact and non-invasive fashion. Laser-induced propagating stress waves interrogate the bulk and/or surfaces of the tubular material for defects such as cracks and voids. The waves acquired by FTI are analyzed using a wavelet-based signal processing algorithm to extract feature information. The results reported in this work suggest the applicability and feasibility of the technique for real-time, in-line inspection of tubular products at the final stage of production. Key developments in current hardware required to advance the system from a laboratory tool to one system that is sufficiently robust to perform reliably in an industrial production setting will be discussed.
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CIDIM 97, 1997
Se presenta una aplicación del método de fotoelasticidad y elemento finito al estudio estático de... more Se presenta una aplicación del método de fotoelasticidad y elemento finito al estudio estático de problemas de contacto elástico. Este estudio experimental-numérico presenta una alternativa de análisis y modelado del problema de contacto mecánico
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6th International Energy Conversion Engineering Conference (IECEC), 2008
In practical use, ammonia (NH 3) can be burned directly in internal combustion (IC), diesel or St... more In practical use, ammonia (NH 3) can be burned directly in internal combustion (IC), diesel or Stirling engines. However, because NH 3 has such a low flame temperature and is hard to ignite, it has generally not been widely used in these applications. Because NH 3 can be easily reformed into hydrogen (H 2), and as part of the effort to examine the benefits of ammonia for terrestrial applications, we develop processes for catalytic reformation of NH 3 and utilize microfibrous materials to encapsulate reforming catalyst. After demonstrating reformation of NH 3 studies were conducted on the stability and feasibility of burning NH 3 by itself and burning NH 3 with synthetic reformate. Favorable conditions for flame stability of combustion of hydrogen reformed from ammonia through this catalyst-impregnated microfibrous porous media were obtained and the results are presented. Initial findings demonstrated stable catalytic combustion and flame temperatures of 940ºC were obtained. Nomenclature = energy density f = flow rate Q b = Heat capacity of burner
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Office of Technology Transfer - Auburn University, 2010
Auburn University is seeking a licensee or development partner for a new system for blasting. Thi... more Auburn University is seeking a licensee or development partner for a new system for blasting. This design improves the efficiency of plasma blasting, which is known to have several advantages over conventional blasting but has previously been too expensive. By redesigning the blasting probe and with the introduction of a specialized blasting fluid, the costs of plasma blasting can be significantly reduced. This method has the potential to improve blasting in mining, construction, space, or other applications necessary for rock removal or demolition. Advantages Minimizes vibrations, noise and flying debris, resulting in a safer work environment and increasing control allowing for application in more locations (e.g. in populated sites) Reusable and adjustable probe, reducing both materials cost and inventory More volume of rock breakage for a given energy input, lowering operating costs compared to traditional plasma blasting Inert and environmentally friendly, making it applicable where chemical explosives are prohibited and eliminating transport restrictions Description In a plasma blasting system, electrical energy is deposited into a fluid which then creates acoustic, pressure and shock waves that break apart a solid material. Traditionally, plasma blasting has proven too expensive for practical use due to large required energy inputs and single-use equipment. By redesigning the blasting probe and the introduction of a specialized blasting fluid, the costs of plasma blasting can be significantly reduced, making it comparable to traditional blasting methods that have significant drawbacks by comparison. This two-part invention first consists of a specialized fluid that surrounds the probe. This fluid better seals the bore hole to hold the probe in place, and also better transmits the blast energy. This allows for a reduction in energy requirements. The second part consists of a redesigned blasting probe that allows for better control of energy input, further reducing energy requirements. With these lowered requirements, the probe size can be reduced, which lowers the cost. Additionally, the life of the probe is increased. Without having to replace the probe with every use, materials costs are further lowered. With these reductions in expenses, plasma blasting may now become cost competitive with conventional blasting techniques. This would allow users to realize the advantages of plasma blasting, including reduced vibrations, relatively low noise, minimized flying debris ("fly rock") and chemical inertness.
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