Shell Stability

1983 ◽  
Vol 50 (4b) ◽  
pp. 935-940 ◽  
Author(s):  
C. D. Babcock
Keyword(s):  
Dynamic Buckling ◽  
Recent History ◽  
Postbuckling Behavior ◽  
Imperfection Sensitivity ◽  
Plastic Buckling ◽  
Shell Stability ◽  
Current Trends ◽  
Shell Buckling ◽  
History Of ◽  
Subject Areas

Recent advances in shell buckling research are reviewed. Five separate subject areas are covered: elastic postbuckling behavior and imperfection sensitivity, plastic buckling, dynamic buckling, experiments and computations. Recent history of the research is presented emphasizing important advances in understanding. Areas of needed research and current trends are pointed out.

scholarly journals Influence of Uncertainties on the Dynamic Buckling Loads of Structures Liable to Asymmetric Postbuckling Behavior

2008 ◽  
Vol 2008 ◽  
pp. 1-24 ◽  
Author(s):  
Paulo B. Gonçalves ◽  
Donald Mark Santee
Keyword(s):  
Static Load ◽  
Basin Of Attraction ◽  
Dynamic Buckling ◽  
Buckling Load ◽  
Postbuckling Behavior ◽  
Imperfection Sensitivity ◽  
Buckling Loads ◽  
Melnikov Criterion ◽  
Linear Buckling ◽  
The Stability

Structural systems liable to asymmetric bifurcation usually become unstable at static load levels lower than the linear buckling load of the perfect structure. This is mainly due to the imperfections present in real structures. The imperfection sensitivity of structures under static loading is well studied in literature, but little is know on the sensitivity of these structures under dynamic loads. The aim of the present work is to study the behavior of an archetypal model of a harmonically forced structure, which exhibits, under increasing static load, asymmetric bifurcation. First, the integrity of the system under static load is investigated in terms of the evolution of the safe basin of attraction. Then, the stability boundaries of the harmonically excited structure are obtained, considering different loading processes. The bifurcations connected with these boundaries are identified and their influence on the evolution of safe basins is investigated. Then, a parametric analysis is conducted to investigate the influence of uncertainties in system parameters and random perturbations of the forcing on the dynamic buckling load. Finally, a safe lower bound for the buckling load, obtained by the application of the Melnikov criterion, is proposed which compare well with the scatter of buckling loads obtained numerically.

Physiologic Measures In Patients with PTSD with and Without A Recent History of Alcohol Abuse

2007 ◽  
Author(s):  
Eileen Ahearn ◽  
Mary Mussey ◽  
Catherine Johnson ◽  
Amy Krohn ◽  
Timothy Juergens ◽  
...  
Keyword(s):  
Alcohol Abuse ◽  
Recent History ◽  
History Of

Fictive Mode, ‘Journey to the West’, and Transformation of Space: ‘Ali Mubarak’s Discourses of Modernization

2007 ◽  
Vol 4 (3) ◽  
pp. 331-358
Author(s):  
WEN-CHIN OUYANG
Keyword(s):  
Cultural Transformation ◽  
Recent History ◽  
Theoretical Principle ◽  
Time And Space ◽  
The West ◽  
Arab Culture ◽  
History Of ◽  
Journey To The West

I begin my exploration of ‘Ali Mubarak (1823/4–1893) and the discourses on modernization ‘performed’ in his only attempt at fiction, ‘Alam al-Din (The Sign of Religion, 1882), with a quote from Guy Davenport because it elegantly sums up a key theoretical principle underpinning any discussion of cultural transformation and, more particularly, of modernization. Locating ‘Ali Mubarak and his only fictional work at the juncture of the transformation from the ‘traditional’ to the ‘modern’ in the recent history of Arab culture and of Arabic narrative, I find Davenport's pronouncement tantalizingly appropriate. He not only places the stakes of history and geography in one another, but simultaneously opens up the imagination to the combined forces of time and space that stand behind these two distinct yet related disciplines.

Asian Americans and Pacific Islanders Excel in Business but Not without Risks

2016 ◽  
Vol 14 (2) ◽  
pp. 77-90
Author(s):  
Bill Imada
Keyword(s):  
Asian Americans ◽  
Asian American ◽  
Immigration Policy ◽  
Pacific Islanders ◽  
Significant Growth ◽  
Current Trends ◽  
History Of ◽  
Mainstream Society ◽  
American Society ◽  
The U.S

In recent years, data has shown that there has been significant growth in Asian American Pacific Islander-owned (AAPI) enterprises. Driven by demographic changes, related in large part to the history of immigration policy, the AAPI population has been growing, and this has been accompanied by AAPI innovators and entrepreneurs leaving greater marks on American society and the U.S. economy. This growth, however, is not without risks and threats. The legacy of being “othered” by mainstream society means that AAPI success in business and in the corporate landscape can be met with resentment and criticism. This article explores the history of AAPI entrepreneurship and current trends. It also examines the challenges that the community may continue to face and offers recommendations on how to ensure continued growth and expanded opportunities for AAPIs in business.

Predictors of Treatment Response to Fluoxetine in PTSD Following a Recent History of War Zone Stress Exposure

2012 ◽  
Author(s):  
Paul S. Hicks ◽  
Michael L. Adams ◽  
Brett Litz ◽  
Keith Young ◽  
Jed Goldart ◽  
...  
Keyword(s):  
Treatment Response ◽  
Recent History ◽  
Stress Exposure ◽  
War Zone ◽  
History Of

On the nature of chemistry

2018 ◽  
Vol 10 (2) ◽  
pp. 74 ◽  
Author(s):  
Eric R. Scerri
Keyword(s):  
19Th Century ◽  
The Other ◽  
Recent History ◽  
History Of Chemistry ◽  
History Of ◽  
The One ◽  
Fundamental Unity ◽  
The 19Th Century

<span>The very nature of chemistry presents us with a tension. A tension between the exhilaration of diversity of substances and forms on the one hand and the safety of fundamental unity on the other. Even just the recent history of chemistry has been al1 about this tension, from the debates about Prout's hypothesis as to whether there is a primary matter in the 19th century to the more recent speculations as to whether computers will enable us to virtually dispense with experimental chemistry.</span>

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