Zobrazeno 1 - 10
of 16
pro vyhledávání: '"John S. Madsen"'
Publikováno v:
Materials
Volume 13
Issue 10
Materials, Vol 13, Iss 2308, p 2308 (2020)
Volume 13
Issue 10
Materials, Vol 13, Iss 2308, p 2308 (2020)
Due to the rapid cooling and directional heat flow inherent in metal-based additive manufacturing, Ti-6Al-4V results in epitaxial grain growth and a fiber texture of the prior &beta
phase. While Ti-6Al-4V produced via powder bed, electron beam m
phase. While Ti-6Al-4V produced via powder bed, electron beam m
Autor:
Eric Fodran, Andrea Nicolas, Michael D. Sangid, Ross B. Cunningham, Anthony D. Rollett, John S. Madsen, Elias L. Anagnostou
Publikováno v:
Materials Research Letters, Vol 5, Iss 7, Pp 516-525 (2017)
Metal additive manufacturing techniques such as the powder-bed systems are developing as a novel method for producing complex components. This study uses synchrotron-based X-ray microtomography to investigate porosity in electron beam melted Ti-6Al-4
Autor:
James Glimm, A. P. Jardine, John S. Madsen, F. M. Tangerman, W. K. Chui, R. Leek, T. M. Donnellan
Publikováno v:
SIAM Review. 39:714-727
Resin transfer molding (RTM) has drawn interest in recent years as an attractive technique for the manufacture of advanced fiber-reinforced composite materials. A major issue in this new manufacturing process is the reduction of voids during the resi
Autor:
John S. Madsen, A. Peter Jardine
Publikováno v:
Scripta Metallurgica et Materialia. 30:1189-1194
Cold-working has been demonstrated to lower the crystallization temperature for amorphous, free-standing TiNi by approximately 100 C, making it potentially integratable with certain polymeric materials. If cold-working initiates lower temperature nuc
Autor:
Elias L. Anagnostou, Stephen J. Engel, Liang Tang, John S. Madsen, John M. Papazian, David H. Hoitsma
Publikováno v:
51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 18th AIAA/ASME/AHS Adaptive Structures Conference 12th.
The purpose of the DARPA/Northrop Grumman Structural Integrity Prognosis System (SIPS) Advanced Reasoning and Adaptive Prediction methods is to provide a prompt, useful prediction of remaining fatigue life in a structural element. In order to make th
Autor:
David H. Hoitsma, Elias L. Anagnostou, John S. Madsen, John M. Papazian, Jerrell A. Nardiello, Stephen J. Engel, Northrop Grumman Corp
Publikováno v:
51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 18th AIAA/ASME/AHS Adaptive Structures Conference 12th.
The structural integrity of aircraft has become a critical issue in ensuring the combat readiness of aging aircraft and in the need for more efficient use and maintenance of vital assets. In order to address this need, a science-based approach was ta
Autor:
John M. Papazian, Daniel R. Fridline, Stephen J. Engel, Jerrell A. Nardiello, David H. Hoitsma, John S. Madsen, Elias L. Anagnostou
Publikováno v:
51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 18th AIAA/ASME/AHS Adaptive Structures Conference 12th.
Probabilistic microstructurally-based models for fatigue are being developed as part of a DARPA/Northrop Grumman Structural Integrity Prognosis System (SIPS). An integrated framework has been developed to provide probabilistic fatigue life prognosis
Autor:
John S. Madsen, A. Peter Jardine
Publikováno v:
SPIE Proceedings.
Smart materials composed of ferroelastic and ferroelectric materials are described for damping of mechanical waves. These heterostructures using active and adaptive materials will likely be represented by heterostructures of several types of thin and
Publikováno v:
SPIE Proceedings.
Optical fibers were embedded into graphite-epoxy polymer matrix composites using a variety of geometries and insertion techniques to evaluate different manufacturing methods for embedding sensors in composite materials. Fiber durability during proces
Publikováno v:
MRS Proceedings. 305
Understanding elastic interactions that occur between an embedded optical fiber and its host matrix is important for implementation of optical strain sensors into aerospace structures. A previously developed analytical model predicted the effects of