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DYNAMIC BURN-IN SYSTEM FOR USE IN A TESTING PROGRAM TO ACCELERATE AND IDENTIFY MOS RAM FAILURE MODES
Title
A DYNAMIC BURN-IN SYSTEM FOR USE IN A TESTING PROGRAM TO ACCELERATE AND IDENTIFY MOS RAM FAILURE MODES.
Creator
BELYEU, STANLEY MOND., Florida Atlantic University, Messenger, Roger A.
Abstract/Description
A survey of MOS RAM failure modes describes those failures that a complete MOS RAM testing program accelerates and identifies. Functional testers perform the identification while burn-in testers accelerate various failure modes. A dynamic burn-in system that includes temperature, bias, and operational signal stress has been designed so that a large number of MOS RAM modules are stressed during a burn-in cycle. The system requires flexible hardware and software configurations and an almost...
Show moreA survey of MOS RAM failure modes describes those failures that a complete MOS RAM testing program accelerates and identifies. Functional testers perform the identification while burn-in testers accelerate various failure modes. A dynamic burn-in system that includes temperature, bias, and operational signal stress has been designed so that a large number of MOS RAM modules are stressed during a burn-in cycle. The system requires flexible hardware and software configurations and an almost universal product interface. Since these requirements have been met and the characteristics of the stress signals are similar to those encountered by the product during a normal lifetime, the dynamic burn-in system presented in this study can effectively accelerate the most prominent MOS RAM failure modes.
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Date Issued
1978
PURL
http://purl.flvc.org/fcla/dt/13901
Subject Headings
Materials--Dynamic testing, Electric testing
Format
Document (PDF)
Effects of Granulometric Parameters and Mix Proportions on the Shear Strength of Binary Granular Mixtures.
Title
Effects of Granulometric Parameters and Mix Proportions on the Shear Strength of Binary Granular Mixtures.
Creator
Gonzalez Moya, Daniel E., Sobhan, Khaled, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description
Geotechnical engineers are commonly faced with the need to perform ground improvement techniques to achieve the necessary bearing capacity for a project. Some of the most common techniques involve the excavation and replenishment of problematic geomaterial with one of better quality. Common projects, such as road embankments and retaining walls, also require the selection of backfill material. The guidelines for selecting backfill material are typically limited to complying with certain...
Show moreGeotechnical engineers are commonly faced with the need to perform ground improvement techniques to achieve the necessary bearing capacity for a project. Some of the most common techniques involve the excavation and replenishment of problematic geomaterial with one of better quality. Common projects, such as road embankments and retaining walls, also require the selection of backfill material. The guidelines for selecting backfill material are typically limited to complying with certain gradation bands, relative densities and allowable fines content. Round-grained silica sand, and beach sand from Boca Raton, FL, were used to generate a total of 16 binary granular mixtures containing different amounts of finer material, for which a series of direct shear tests were conducted. Based on the experimental results, it may be possible to provide an alternative criteria for selecting backfill material based on granulometric parameters and the amount of finer material.
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Date Issued
2016
PURL
http://purl.flvc.org/fau/fd/FA00004714, http://purl.flvc.org/fau/fd/FA00004714
Subject Headings
Continuum mechanics, Geotechnical engineering, Granular materials -- Dynamic testing, Micromechanics -- Mathematical models, Soil liquefaction
Format
Document (PDF)
Permanent strain accumulation in a granular material due to cyclic loading
Title
Permanent strain accumulation in a granular material due to cyclic loading.
Creator
Genduso, Michael J., Florida Atlantic University, Sobhan, Khaled Dr.
Abstract/Description
To better characterize the accumulation of permanent deformation in a granular material, 40 Consolidated Drained (CD) triaxial tests (14 static and 26 cyclic) were performed under various stress conditions. A Digital Image Correlation (DIC) technique was utilized in some Repeated Load Triaxial (RLT) tests to measure global and localized strains visually in a non-contact manner. Additionally, the experimentally determined resilient material properties were used in a finite element based...
Show moreTo better characterize the accumulation of permanent deformation in a granular material, 40 Consolidated Drained (CD) triaxial tests (14 static and 26 cyclic) were performed under various stress conditions. A Digital Image Correlation (DIC) technique was utilized in some Repeated Load Triaxial (RLT) tests to measure global and localized strains visually in a non-contact manner. Additionally, the experimentally determined resilient material properties were used in a finite element based pavement modeling software called MICH-PAVE. Under cyclic loading, the permanent strain accumulation was found to obey the relationship of the form epsilonp =aNb, and the Resilient Modulus was used to develop the nonlinear K-theta model for granular materials. The observed/measured permanent strains using DIC/LVDT techniques compared favorably with the values obtained by the finite element simulation, and the evaluation of granular material by multiple methods seems promising for improved pavement design.
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Date Issued
2005
PURL
http://purl.flvc.org/fcla/dt/13264
Subject Headings
Soils--Testing, Soil mechanics, Soil-structure interaction, Engineering geology, Rocks--Testing, Materials--Dynamic testing
Format
Document (PDF)