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Relevant bibliographies by topics / General johnston

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Academic literature on the topic 'General johnston'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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Journal articles on the topic "General johnston"

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Johnston, Douglas, R. "Overcoming cardiac allograft vasculopathy (CAV) by inducing tolerance." Frontiers in Bioscience 7, no. 1-3 (2002): e116. http://dx.doi.org/10.2741/johnston.

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Dawson, Jane V., and Brian H. Watson. "Grace Johnston." Medical Journal of Australia 163, no. 4 (August 1995): 201. http://dx.doi.org/10.5694/j.1326-5377.1995.tb124524.x.

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Carey, Anthony, John Doyle, and Clive Jackson. "Robert Edward Johnston." Australian Veterinary Journal 89, no. 7 (June 22, 2011): 259. http://dx.doi.org/10.1111/j.1751-0813.2011.00798.x.

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Pedrana, RG. "Davies Keir Johnston." Australian Veterinary Journal 79, no. 9 (September 2001): 633. http://dx.doi.org/10.1111/j.1751-0813.2001.tb10786.x.

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Addis, G. M. "George Johnston Addis." BMJ 343, no. 10 2 (November 10, 2011): d7231. http://dx.doi.org/10.1136/bmj.d7231.

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Waters, P. "Kevin J. Johnston." British Dental Journal 198, no. 6 (March 2005): 381. http://dx.doi.org/10.1038/sj.bdj.4812207.

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Fairrie, Nicholas. "Anthony Johnston Fairrie." BMJ 333, no. 7580 (December 7, 2006): 1224.3–1224. http://dx.doi.org/10.1136/bmj.39055.563958.fa.

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Legge, J. S. "Robert Neilson Johnston." BMJ 342, may05 3 (May 5, 2011): d2845. http://dx.doi.org/10.1136/bmj.d2845.

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HOLLAND, PETER, and ERIC PAWSON. "Professor Barry Johnston." New Zealand Geographer 49, no. 2 (October 1993): 3–6. http://dx.doi.org/10.1111/j.1745-7939.1993.tb02033.x.

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Green, N. Alan, and Peter Craig. "Ivan David Alexander Johnston." BMJ 336, no. 7646 (March 27, 2008): 727.4–727. http://dx.doi.org/10.1136/bmj.39517.781493.be.

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Dissertations / Theses on the topic "General johnston"

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Johnston, Tina Marie. "Creativity in counseling : breathe life into your work : an experiential workshop for the novice counselor /." Full-text of dissertation on the Internet (1.17 MB), 2010. http://www.lib.jmu.edu/general/etd/2010/masters/johnsttm/johnsttm_masters_04-15-2010.pdf.

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Zhu, Xinyao. "Effect of surface adhesion in contact : application of Johnson-Kendall-Roberts model of nanoindentation." Thesis, University of Warwick, 2015. http://wrap.warwick.ac.uk/78058/.

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Finally this work studied the effect of surface adhesion on the mechanical behavior of two soft materials (two kinds of biological cells) subjected to atomic force microscope (AFM) indentation, i.e. pancreatic MIN6 cell and hepatocellular carcinoma which were treated by calcimimetic R568 and fullerenol respectively. They were also indented by different AFM probes: MIN6 cell by spherical indenter, and cancer cell by Vickers indenter. First of all, surface adhesion was manifested by the negative value of indentation force. For MIN6 cells，both JKR and finite element method are used to fit the force-displacement curve obtained by AFM indentation. For hepatocellular carcinoma, the JKR model is adapted for the Vickers indenter, and the “adapted” JKR model is used to fit the force-displacement curve. The results showed that JKR model can best describe the unloading force-displacement behaviors of the indentation curves, where a new parameter, termed work of adhesion in addition to Young’s modulus was extracted. Moreover, the difference between two biological cells and their treated counterparts were detected in terms of the magnitudes of the extracted parameters, i.e. Young’s modulus and work of adhesion. This implies that the study on the surface adhesion has potential significance in terms of medical diagnostics. The main contributions from the present research could be summarized as follows: i. For hard materials, this study presents a systematic investigation on the effect of surface adhesion on the shakedown behavior of two hardening materials, i.e. isotropic and kinematic hardening. The simulative results show that surface adhesion alone can initiate plastic deformation. In non-adhesive repeated contact, only elastic shakedown can occur while in adhesive repeated contact, plastic shakedown can occur, which indicate that surface adhesion force can alter the mechanical response of substrate material subjected to repetitive indentation. ii. For soft materials, this work uses JKR model to fit the force-displacement curve, yielding a new parameter, i.e. work of adhesion, in addition to Young’s modulus. In comparison to the Hertzian contact model, the JKR model provides obviously better fitting to the experimental results, indicating that the adhesion is significant in the cell interaction. Moreover, the difference between various biological cells could be characterized by the magnitude of work of adhesion, which implies that this parameter may also serve medical diagnostics.

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Stanton, David W. G. "Phylogeography, population genetics and conservation of the okapi (Okapia johnstoni)." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/61273/.

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The okapi (Okapia& johnstoni) is an endangered, evolutionarily distinct giraffid, endemic to the Democratic Republic of Congo (DRC). The okapi is a flagship species for the DRC,a country that contains some of the greatest biodiversity in the world. The okapi is currently under major threat from habitat fragmentation, human encroachment and poaching, yet to date, very little is known about the species in the wild, and no genetic study in the wild or captivity has ever been carried out. This thesis aims to use genetics to aid conservation efforts of okapi,a species that due to its elusive nature, is highly challenging to study using alternative methods.

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Transportation, Tennessee Department of. "General Highway Map - Washington County, Tennessee - 1985." Digital Commons @ East Tennessee State University, 1985. https://dc.etsu.edu/rare-maps/47.

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General highway map of Washington County, Tennessee prepared by the Tennessee Department of Transportation, Bureau of Planning and Development-Planning Division in cooperation with the U.S. Department of Transportation, Federal Highway Administration. Field data obtained in 1977. Field Examination made in 1984. The road names shown on this map were approved by the Washington County Commission in 1985. Legend denotes multiple categories including dwellings and businesses as well as county infrastructure. Several insets of specific communities and areas of interest are included. Lines of longitude and latitude are listed along the outside border. Scale - 1" = 1 mile
https://dc.etsu.edu/rare-maps/1046/thumbnail.jpg

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Transportation, Tennessee Department of. "General Highway Map - Washington County, Tennessee - 1991." Digital Commons @ East Tennessee State University, 1991. https://dc.etsu.edu/rare-maps/40.

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General highway map of Washington County, Tennessee prepared by the Tennessee Department of Transportation, Bureau of Planning and Development-Planning Division in cooperation with the U.S. Department of Transportation, Federal Highway Administration. Field data obtained in 1977. Field Examination made in 1984. The road names shown on this map were approved by the Washington County Commission in 1985. Legend denotes multiple categories including dwellings and businesses as well as county infrastructure. Several insets of specific communities and areas of interest are included. Lines of longitude and latitude are listed along the outside border. Scale for general map - 1/2" = 1 mile Scale for insets - 1" = 0.3 mile
https://dc.etsu.edu/rare-maps/1039/thumbnail.jpg

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Miura, Nicholas Z. "COMPARISON AND DESIGN OF SIMPLIFIED GENERAL PERTURBATION MODELS (SGP4) AND CODE FOR NASA JOHNSON SPACE CENTER, ORBITAL DEBRIS PROGRAM OFFICE." DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/86.

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This graduate project compares legacy simplified general perturbation model (SGP4) code developed by NASA Johnson Space Center, Orbital Debris Program Office, to a recent public release of SGP4 code by David Vallado. The legacy code is a subroutine in a larger program named PREDICT, which is used to predict the location of orbital debris in GEO. Direct comparison of the codes showed that the new code yields better results for GEO objects, which are more accurate by orders of magnitude (error in meters rather than kilometers). The public release of SGP4 also provides effective results for LEO and MEO objects on a short time scale. The public release code was debugged and modified to provide instant functionality to the Orbital Debris Program Office. Code is provided in an appendix to this paper along with an accompanying CD. A User’s Guide is presented in Chapter 7.

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Pettersson, Ulf. "Där berättelsen äger rum : Narration, perception och kognition i ett kombinerat text- och läsarperspektiv med exempel ur Eyvind Johnsons författarskap." Licentiate thesis, Linnéuniversitetet, Institutionen för språk och litteratur, SOL, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-9995.

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I en narratologisk studie granskas spatialitet i skönlitterär prosatext. I texten undersöks några spatiala nivåer som kan länkas till extradiegetisk berättarinstans och "normal" perception kontra drömmar och visioner hos karaktärer inom diegesen. Till den narratologiska studien kopplas undersökningsmodeller hämtade från det som med en paraplyterm kallas kognitiv poetik och som behandlar både den litterära texten och läsarens perception och kognition i läsprocessen. I studien berörs också den fiktiva berättelsen betraktad som "värld" ur ett litteraturteoretiskt och filosofiskt resonemang kring begreppen "actual world", "possible worlds" och "fictional worlds". Det övergripande syftet är att förklara hur text och läsarkognition samspelar för att skapa mentala, rumsliga "bilder" hos läsaren, bilder som kan skifta mellan olika läsare och som resulterar i den berättelsens "värld" som läsaren upplever. Som grundtexter i avhandlingsarbetet används Eyvind Johnsons Krilonsvit.

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Zielinski, Kristin Ann. "Correlations and Predictive Ability of Oral Reading Fluency and the Wilson Reading System on End of Year Assessments." Diss., Temple University Libraries, 2010. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/103659.

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School Psychology
Ph.D.
To insure academic success for students with learning disabilities, it is critical that educators are able to make timely and effective instructional decisions. The focus of this study was to evaluate the relationship and effectiveness of two different progress monitoring tools, a measure of oral reading fluency and the Wilson Reading System's level documentation against measures of reading achievement. Reading achievement was specifically, examined using cluster scores from the Woodcock Johnson Tests of Achievement - Third Edition (WJ-III) Broad and Brief Reading domains. The current study investigated archival data of 51 students, grades four through eight, enrolled in a small, private school for students with learning disabilities during the 2008-2009 school year. Oral reading fluency benchmark and regular progress monitoring scores were collected from students and the progress monitoring scores were converted into an overall rate of improvement. Data from students receiving instruction in the Wilson Reading System were also collected as levels mastered throughout the school year. All students received pre- and post-testing on the WJ-III Reading domain. No significant relationships were found between oral reading fluency rate of improvement and Wilson level. Additionally, only the oral reading fluency spring benchmark significantly predicted end of year WJ-III performance after pre-test scores were taken into account. Supplemental analyses did find that students who completed levels seven and eight in the 2008 - 2009 school year consistently performed better than peers who completed levels two through six at all oral reading fluency benchmark periods. Limitations to the study and implications for future research and practice are discussed.
Temple University--Theses

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Young, James L. Jr. "United States Air Force Defense Suppression Doctrine, 1968-1972." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/901.

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McCandless, Richard Thomas. "Korean War and Vietnam War Strategies: A Comparison." Oxford, Ohio : Miami University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1236018769.

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Books on the topic "General johnston"

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Joseph E. Johnston: Confederate general. Philadelphia: Chelsea House Publishers, 2002.

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The essential Jennifer Johnston. London: Review, 1999.

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Jefferson Davis's greatest general: Albert Sidney Johnston. Abilene, TX: McWhiney Foundation Press, 2000.

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Worthy opponents: General William T. Sherman. USA ; General Joseph E. Johnston. CSA. Nashville, Tenn: Rutledge Hill Press, 2006.

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McCulley, Johnston. Johnston McCulley's Zorro: The masters edition. Madison, Wis: Pulp Adventures, 2000.

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Wilson, Clyde Norman. Carolina cavalier: The life and mind of James Johnston Pettigrew. Athens: University of Georgia Press, 1990.

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Lash, Jeffrey N. Destroyer of the the iron horse: General Joseph E. Johnston and confederate rail transport, 1861-1865. Kent, Ohio: Kent State University Press, 1991.

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Atlanta will fall: Sherman, Joe Johnston, and the Yankee heavy battalions. Wilmington, Del: Scholarly Resources, 2001.

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Assembly, Canada Legislature Legislative. Bill: An act to enable the surviving trust[ees] under the will of the late Lieutena[nt] General Sir William Johnston, K.C.[B.], deceased, to sell certain lands in Can[ada] belonging to the estate of the said G[en]eral Johnston. Quebec: Hun[ter], Rose & Lemieux, 2003.

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Vance, Faith Johnson. E.H. Johnson. Toronto: E.H. Johnson Trust Fund, Presbyterian Church in Canada, 1999.

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Book chapters on the topic "General johnston"

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Barclay, Katie, and François Soyer. "Charles Johnson, a General History of the Pyrates, from their Rise and Settlement in the Island of Providence, to the Present Time …" In Emotions in Europe 1517–1914, 31–36. London: Routledge, 2021. http://dx.doi.org/10.4324/9781003175513-4.

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Daniel, Larry J. "The Johnston Imprint." In Conquered, 247–65. University of North Carolina Press, 2019. http://dx.doi.org/10.5149/northcarolina/9781469649504.003.0018.

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After much debate, Davis assignd General Joseph E. Johnston permanent command of the Army of Tennessee. Johnston inherited an army that was not prepared to go on the offensive. Davis promoted John Bell Hood, who received a broken arm at Gettysburg and had a leg amputated after Chickamauga, to lieutenant general. After the reassignments, Davis and Bragg pushed for an offensive campaign in middle Tennessee, but Johnston contested due to lack of supplies and troops. Johnston proposed Davis send him troops before an offensive, but to no avail. Johnston improved the discipline of the army by doing things such as running drills for three hours a day and having roll call five times a day. Johnston’s drills and use of mock battles in addition to voluntary re-enlistment of three year-troops lead to increased national identity among Army of Tennessee troops.

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Hess, Earl J. "To the Chattahoochee." In The Battle of Peach Tree Creek. University of North Carolina Press, 2017. http://dx.doi.org/10.5149/northcarolina/9781469634197.003.0001.

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William T. Sherman's conduct of the Atlanta campaign from the first week of May until he reached the Chattahoochee River by mid-July 1864 was highly successful. Relying on his railroad link with Louisville, Kentucky, Sherman refused to risk his men in repeated or heavy frontal attacks against the well-fortified positions Confederate General Joseph E. Johnston established at Dalton, Resaca, New Hope, Pickett's Mill, and Kennesaw Mountain. Although Sherman experimented with a few attacks along the way, most notably at Resaca and Kennesaw Mountain, his failure did not result in crippling losses like those suffered by Ulysses S. Grant at the same time in Virginia. Johnston's tendency to evacuate his strong positions at the slightest sign of Union flanking moves, or because his corps leaders thought those positions untenable, not only contributed to Sherman's success but tremendously increased the morale of Union soldiers to the point where they were supremely confidence in their leader and in the eventual success of the campaign. In contrast, when Johnston fell back across the Chattahoochee River on July 9, Confederate President Jefferson Davis lost all patience with his Fabian strategy in Georgia and came to the conclusion that he had to be replaced. Johnston failed to protect all the possible crossings of the Chattahoochee that could be used by the Federals. As a result, Sherman was able to secure two bridgeheads on the south side of the river, well north of its junction with Peach Tree Creek, in the days following Johnston's fall back.

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Boswell, James. "To Daniel Johnston, Saturday 24 June 1769." In The Yale Editions of the Private Papers of James Boswell: Research Edition: Correspondence, Vol. 7: The General Correspondence of James Boswell, 1766–1769: Volume 2: 1768–1769, edited by Richard C. Cole, Peter S. Baker, and Rachel McClellan. Edinburgh University Press, 1997. http://dx.doi.org/10.1093/oseo/instance.00183262.

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"From Daniel Johnston, Monday 17 July 1769." In The Yale Editions of the Private Papers of James Boswell: Research Edition: Correspondence, Vol. 7: The General Correspondence of James Boswell, 1766–1769: Volume 2: 1768–1769, edited by Richard C. Cole, Peter S. Baker, and Rachel McClellan, 206. Edinburgh University Press, 1997. http://dx.doi.org/10.1093/oseo/instance.00183293.

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Boswell, James. "To Archibald Johnston, Friday 3 October 1766." In The Yale Editions of the Private Papers of James Boswell: Research Edition: Correspondence, Vol. 5: The General Correspondence of James Boswell, 1766–1769: Volume 1: 1766–1767, edited by Richard C. Cole, Peter S. Baker, and Rachel McClellan. Edinburgh University Press, 1993. http://dx.doi.org/10.1093/oseo/instance.00182832.

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"From Daniel Johnston, Thursday 1 December 1766." In The Yale Editions of the Private Papers of James Boswell: Research Edition: Correspondence, Vol. 5: The General Correspondence of James Boswell, 1766–1769: Volume 1: 1766–1767, edited by Richard C. Cole, Peter S. Baker, and Rachel McClellan, 89. Edinburgh University Press, 1993. http://dx.doi.org/10.1093/oseo/instance.00182862.

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Daniel, Larry J. "High Tide." In Conquered, 32–48. University of North Carolina Press, 2019. http://dx.doi.org/10.5149/northcarolina/9781469649504.003.0003.

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General Braxton Bragg inherits a demoralized and ragged army. To deter desertions and improve the professionalism of his troops in general, Bragg implements stricter rules and punishments, which earn him a poor reputation among his subordinates. Expecting Kentuckians to rise en masse and join the southern cause, Bragg marches into Kentucky hoping to secure Confederate control of the state. Ultimately, the number of Kentucky natives that join the army is unimpressive, Bragg fails to secure the state, and he and his army return to Tennessee. Later, General Joseph E. Johnston is placed in charge of the newly formed Western Department, which includes a department in east Tennessee lead by Edmund Kirby Smith, Bragg’s department in Middle Tennessee, and John C. Pemberton in Mississippi. Johnston is skeptical of his department’s future success due to lack of troops, transportation issues, and what he considered faulty strategy suggested by President Davis and military officials.

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GHENUŢĂ, Cristina. "ILINCA ZARIFOPOL-JOHNSTON: ÎN CĂUTAREA LUI CIORAN... REGĂSINDU-SE PE SINE." In Scriitori români de expresie străină. Écrivains roumains d’expression étrangère. Romanian Authors Writing in Foreign Tongues, 296–304. Pro Universitaria, 2021. http://dx.doi.org/10.52744/9786062613242.19.

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In addition to those Romanian writers who succeeded in gaining recognition both in a foreign country and in their country of birth, many others have unfairly remained unknown to the Romanian readers. Ilinca Zarifopol-Johnston is a writer, translator and editor of two early Romanian texts of the philosophical essayist E. M. Cioran, On the Heights of Despair and Tears and Saints, and a professor in the Department of Comparative Literature at Indiana University, Bloomington. She is the younger daughter of the Romanian writer Dinu Zarifopol, who himself did not receive popular or critical recognition for his work in Romania. The current article, which provides some general information about Ilinca Zarifopol-Johnston’s life and academic work, is an attempt to arouse the reader’s interest in this Romanian author’s literary works, especially in her book entitled Searching for Cioran.

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Hess, Earl J. "This Will Be a Hard Place to Take." In Storming Vicksburg, 70–91. University of North Carolina Press, 2020. http://dx.doi.org/10.5149/northcarolina/9781469660172.003.0005.

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Ulysses S. Grant spent nearly two days evaluating the results of the May 19 attack in order to decide whether to try another assault or initiate siege operations. Meanwhile the Federals concentrated on consolidating their position outside Vicksburg on May 20-21, especially firming up their supply line by way of the Mississippi River. Realizing that the May 19 attack had not been a true test of whether the army could break into Vicksburg, Grant decided to try one more time. He issued orders on May 21 for a general attack the next day at 10 a.m. He was largely supported in this decision by William T. Sherman who thought it had a real chance of succeeding. Grant worried about the presence of Confederate General Joseph E. Johnston at Jackson, Mississippi, forty-five miles east of Vicksburg. He knew that Johnston was assembling troops to save Vicksburg and a quick entry into the city would neutralize that threat. Grant also thought his troops would be reluctant to begin a siege unless they had one more chance to attack. In this, however, he was mistaken, for many Federal soldiers received the news of the pending attack with dread.

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Conference papers on the topic "General johnston"

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Li, Xifeng, Wei Ding, Liyan Ye, and Jun Chen. "Experiment and numerical simulation on cross-die forming of SUS304 metastable austenitic stainless using a modified Johnson-Cook model." In NUMISHEET 2014: The 9th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes: Part A Benchmark Problems and Results and Part B General Papers. AIP, 2013. http://dx.doi.org/10.1063/1.4850033.

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Johnson, K. L., and J. A. Greenwood. "Adhesive Contact of Bodies Having an Elliptical Contact Area." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64177.

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The so-called JKR theory of adhesion between elastic spheres in contact (Johnson, Kendall & Roberts 1971, Sperling 1964) has been widely used in micro-tribology. In this paper the theory is extended to solids of general shape and curvature. It is assumed that the area of contact is elliptical which turns out to be approximately true, though the eccentricity is different from that for non-adhesive contact. Closed form expressions are found for the variation with load of contact radius and displacement, as a function of the ratio of principal relative curvatures of the two bodies in contact. The pull-off force is found to decrease with increasing eccentricity from its value of 3πΔγR/2 in the case of contact of spheres of radius R.

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MacLean, John R., An Huynh, and Leslie J. Quiocho. "Investigation of Boundary Conditions for Flexible Multibody Spacecraft Dynamics." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35511.

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In support of both the Space Shuttle and International Space Station programs, a set of generic multibody dynamics algorithms integrated within the Trick Simulation Environment have addressed a variety of on-orbit manipulator simulation requirements for engineering analysis, procedures development and crew familiarization/training at the NASA Johnson Space Center (JSC). Enhancements to these dynamics algorithms are now being driven by a new set of Constellation program requirements for flexible multibody spacecraft simulation. One particular issue that has been discussed within the NASA community is the assumption of cantilever-type flexible body boundary conditions. This assumption has been commonly utilized within manipulator multibody dynamics formulations as it simplifies the computation of relative motion for articulated flexible topologies. Moreover, its use for modeling of space-based manipulators such as the Shuttle Remote Manipulator System (SRMS) and Space Station Remote Manipulator System (SSRMS) has been extensively validated against flight data. For more general flexible spacecraft applications, however, the assumption of cantilever-type boundary conditions may not be sufficient. This paper describes the boundary condition assumptions that were used in the original formulation, demonstrates that these equations can be augmented to accommodate systems in which the assumption of cantilever boundary conditions no longer applies, and verifies the approach through comparison with an independent model previously validated against experimental hardware test data from a spacecraft flexible dynamics emulator.

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Wang, Heping, Shenfeng Wu, Xueping Zhang, and C. Richard Liu. "On Predicting Residual Stress and Chip Morphology in Pre-Stressed Hard Turning." In ASME 2010 International Manufacturing Science and Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/msec2010-34072.

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To analyze AISI 52100 steel response in hard turning under pre-stressed conditions, an explicit dynamic thermo-mechanical finite element model (FEM) has been developed. The FEM adopts Johnson-Cook constitutive model to describe the workpiece material property; and Johnson-Cook failure model as chip separation criterion; a modified coulomb’s friction law determines the friction behavior at the tool/chip interface. 500MPa of tensile and compressive pre-stress are imposed on the workpiece to simulate the pre-tension-stress and pre-compression-stress conditions respectively in hard turning. The effect of pre-stress on hard turning is determined by analyzing and comparing the simulation results under the three different pr-stress conditions, in terms of saw-tooth chip morphology, cutting forces, plastic strain distribution and temperature distribution on chip, plastic strain distribution and temperature distribution in machined surface, and especially the residual stress in machined surface. It identifies hard cutting under pretension-stress condition is an effective approach to generate a beneficial compressive residual stress profile in hard turning characterized by a bigger value of compressive residual stress and a deeper penetration depth into the hard turned surface which are helpful to enhance the fatigue life of machined components.

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Soni, Sunilkumar, Jun Wei, Aditi Chattopadhyay, and Pedro Peralta. "Multi-Scale Modeling and Experimental Validation for Component Fatigue Life Prediction." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42610.

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A fatigue failure prediction procedure is discussed based on a two scale micro meso mechanical model for metallic structures. This model predicts the fatigue life and accounts for physical quantities like the mean stress effect in high cycle fatigue. Another model developed at meso-scale level with BCJ (Bammann, Chiesa and Johnson, 1996, Theoretical and Applied Mechanics, Tatsumi, Watanabe and Kambe (Editors), 359–376) internal state variables, is used to predict progressive damage in ductile materials. This meso-scale model is incorporated within the general purpose finite element software ABAQUS through a user subroutine VUMAT. A lug joint specimen is simulated using the BCJ model modified for fatigue and the location of the crack initiation sites is found. Experiments are conducted with the lug joint specimen under fatigue loading and the models are validated for the fatigue life prediction and location of the damage sites.

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Ma, Jianfeng, Changqing Qiu, and Shuting Lei. "Comparison of the Effects of Down Milling and Up Milling on the Tool Temperature in Machining of Ti-6Al-4V." In ASME 2015 International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/msec2015-9450.

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Ti-6AL-4V is widely used in the industry for the high strength-to-weight ratio at elevated temperature, its excellent resistance to fracture and corrosion, and biological properties. However, Ti-6AL-4V is hard to manufacture for its reactive chemical properties and low thermal conductivity that causes high temperature on the tool surface. Prediction of the tool temperature distribution from different manufacturing ways, up and down milling, has great significance in predicting tool wear pattern (cutting speed, feed/tooth, and axial depth of cut) in corner milling on temperature of the tool rake face. The tool material used is general carbide and Johnson-Cook plastic model is utilized to model the behavior of the workpiece Ti-6AL-4V. A separate Abaqus heat transfer model is used to analyze the heat transfer process after the tooth disengages the workpiece and before it engages the workpiece again to predict change of temperature distribution during this cooling process. The comparison of the up milling and down milling on the tool temperature is conducted.

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7

Zangrilli, Ursula T., and Lisa M. Weiland. "Multiscale Modeling of Nafion Mechanical Properties." In ASME 2009 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2009. http://dx.doi.org/10.1115/smasis2009-1331.

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Multiscale modeling is used to investigate the mechanical characteristics of ionic polymers with the intent of ultimately expanding understanding of the interplay between multiscale stiffness and electromechanical response. Strategies for manipulating electromechanical transduction of ionic polymers include, but are not limited to: variation of hydration and/or the equivalent weight. In general, variations resulting in increased electroactive response also result in decreased mechanical stiffness and can decrease to the point of limiting mechanical integrity. This effort begins with the supposition that a better understanding of the ionic polymer multiscale material stiffness will enable bypass of this perceived trade-off. Rotational Isomeric State (RIS) theory is used to predict the conformation of a typical polymer hydrophobic backbone for a fully hydrated, sodium exchanged, Nafion 1200 EW case. The RIS method generates a large number of crosslink-to-crosslink chain lengths. The distribution is assessed via Johnson distributions and in turn, employed in a Boltzmann statistical thermodynamics framework to assess mechanical stiffness. The approach explores the impact of morphology on stiffness via imposing as assumed morphology a priori.

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8

Weiland, Lisa Mauck, Emily K. Lada, Ralph C. Smith, and Donald J. Leo. "Application of Monte Carlo Simulations to Hydrated Nafion Stiffness Predictions." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-80396.

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Application of Rotational Isomeric State (RIS) theory to the prediction of Young’s modulus of a solvated ionomer is considered. RIS theory directly addresses polymer chain conformation as it relates to mechanical response trends. Successful adaptation of this methodology to the prediction of elastic moduli would thus provide a powerful tool for guiding ionomer fabrication. The Mark-Curro Monte Carlo methodology is applied to generate a statistically valid number of end-to-end chain lengths via RIS theory for a solvated Nafion case. The distribution of chain lengths is then fitted to a Probability Density Function by the Johnson Bounded distribution method. The fitting parameters, as they relate to the model predictions and physical structure of the polymer, are studied so that a means to extend RIS theory to the reliable prediction of ionomer stiffness may be identified.

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9

Radha, P., and K. Rajagopalan. "Reliability Analysis of Submarine Pressure Hulls With Failure Governed by Inelastic Buckling." In 25th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/omae2006-92032.

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Due to the complexity involved in the inelastic buckling collapse mechanism of stiffened shell structures, the reliability analysis of submarine pressure hull, in which failure is dictated by inelastic effects, assumes great significance among structural engineers. In spite of many years of efforts by different authors to develop good prediction techniques for plastic and elastic-plastic buckling of stiffened shells and also to use the reliability concepts in the submarine pressure hull structures, comprehensive and reliable methods are still scarce. Hence in this paper a rigorous Finite Element analysis of a typical internally ring stiffened submarine pressure hull with failure governed by inelastic overall buckling has been done using the general purpose finite element software NISA. The samples required for each random variable were generated using Random Polar Sampling Technique (RPST) in which the combinations of variates are obtained using a random polar sampling of Latin hypercube sampled values. For the obtained collapse pressures, the reliability of the pressure hull structure has been determined and the effect of mean service loads on reliability has been analysed by taking different Central Safety Factors. The results were validated using Johnson-Ostenfeld Inelastic Correction method and the conclusions are advanced.

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10

Ma, J., Patrick Andrus, Nick H. Duong, Marissa Fischer, Sridhar Condoor, and Shuting Lei. "Numerical Analysis of Tool Performance in Up Milling of Ti-6Al-4V Alloy." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38647.

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Ti-6Al-4V is widely used in industry because of its high strength-to-weight ratio at elevated temperatures, its excellent resistance to fracture and corrosion, and biological properties. However, Ti-6Al-4V is classified as hard-to-cut material because of its high chemical reactivity with most tool materials and its low thermal conductivity that causes high temperature on the tool face. Consequently, prediction of the tool temperature distribution has great significance in predicting tool wear pattern. In this research, Finite Element Method (FEM) is employed to conduct numerical investigation of the effects of cutting conditions (cutting speed, feed/tooth, and axial depth of cut) in corner up milling on temperature of the tool rake face. The tool material used is general carbide and the behavior of the workpiece Ti-6Al-4V is described by using Johnson-Cook plastic model. Because of the computational expense, a separate heat transfer model is built to analyze the heat transfer process after the tooth disengages the workpiece and before it engages the workpiece again to predict change of temperature distribution during this cooling process. This research provides helpful guidance for selecting tool cooling strategies in up milling Ti-6Al-4V alloy.

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Reports on the topic "General johnston"

1

Brown, Carol A. General Harold K. Johnson and the Ambiguities of Strategic Leadership. Fort Belvoir, VA: Defense Technical Information Center, March 1999. http://dx.doi.org/10.21236/ada363378.

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