نتایج جستجو برای: critical failure load

تعداد نتایج: 961182  

The potential of buckling in compressive members has been considered as a disadvantage when using steel members in the construction industry. In spite of the progress made in this regard, buckling is still considered as a challenge in the analysis and design of compressive steel structural members. Such a challenging phenomenon can be controlled by strengthening of compressive members. Stiffene...

2014
Charalampos Androulidakis Emmanuel N. Koukaras Otakar Frank Georgia Tsoukleri Dimitris Sfyris John Parthenios Nicola Pugno Konstantinos Papagelis Kostya S. Novoselov Costas Galiotis

Exfoliated monolayer graphene flakes were embedded in a polymer matrix and loaded under axial compression. By monitoring the shifts of the 2D Raman phonons of rectangular flakes of various sizes under load, the critical strain to failure was determined. Prior to loading care was taken for the examined area of the flake to be free of residual stresses. The critical strain values for first failur...

2013
Nicole H. T. M. Dukers-Muijrers Arjen G. C. L. Speksnijder Servaas A. Morré Petra F. G. Wolffs Marianne A. B. van der Sande Antoinette A. T. P. Brink Ingrid V. F. van den Broek Marita I. L. S. Werner Christian J. P. A. Hoebe

BACKGROUND Determination of Chlamydia trachomatis (Ct) treatment success is hampered by current assessment methods, which involve a single post-treatment measurement only. Therefore, we evaluated Ct detection by applying multiple laboratory measures on time-sequential post-treatment samples. METHODS A prospective cohort study was established with azithromycin-treated (1000 mg) Ct patients (44...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده ادبیات و زبانهای خارجی 1393

the purpose of this study was to find the relationship between critical thinking and self-regulation with reading comprehension of iranian female elementary language learners. the present study is a correlational one having a descriptive design. two questionnaires, critical thinking questionnaire and self-regulation questionnaire which were valid and reliable questionnaires and four reading com...

Journal: :Scalable Computing: Practice and Experience 2002
Shoukat Ali Jong-Kook Kim Yang Yu Shriram B. Gundala Sethavidh Gertphol Howard Jay Siegel Anthony A. Maciejewski Viktor K. Prasanna

This research investigates the problem of allocating a set of heterogeneous applications to a set of heterogeneous machines connected together by a high-speed network. The proposed resource allocation heuristics were implemented on the High Performance Distributed Computing Program’s (HiPer-D) Naval Surface Warfare Center testbed. The goal of this study is to design static resource allocation h...

2013
Zsuzsa Danku Ferenc Kun

Creep rupture of heterogeneous materials occurring under constant sub-critical external loads is responsible for the collapse of engineering constructions and for natural catastrophes. Acoustic monitoring of crackling bursts provides microscopic insight into the failure process. Based on a fiber bundle model, we show that the accelerating bursting activity when approaching failure can be descri...

Journal: :AIDS 2011
Babafemi Taiwo Lu Zheng Sebastien Gallien Roy M Matining Daniel R Kuritzkes Cara C Wilson Baiba I Berzins Edward P Acosta Barbara Bastow Peter S Kim Joseph J Eron

OBJECTIVE To explore darunavir/ritonavir (DRV/r) plus raltegravir (RAL) combination therapy in antiretroviral-naive patients. DESIGN Phase IIb, single-arm, open-label, multicenter study. METHODS One hundred and twelve antiretroviral-naive, HIV-1-infected patients received DRV/r 800/100 mg once daily and RAL 400 mg twice daily. Primary endpoint was virologic failure by week 24. Virologic fai...

Journal: :international journal of advanced design and manufacturing technology 0
abbas heydari

the current study presents a new analytical method for buckling analysis of circular plates with constant thickness and poisson’s ratio, made of functionally graded material subjected to radial load. governing equations are based on energy method for thin plates. the boundary conditions of the plate are assumed to be simply supported and clamped. the stability equations were obtained by using c...

A. Ghasemi, A.R. Yadegari Naeini Yadegari Naeini

Porous materials are lightweight, flexible and resistant to hairline cracks, so today with the development of technology porous structure produced for use in various industries. This structure widely use in beams, plates and shells. The purpose of this paper is to investigate the effect of porosity in axial symmetry in bending and buckling load sheet for analysis. For this purpose, a circular p...

Journal: :Metals 2023

The failure of resistance spot welds through the fusion zone along sheet/sheet interface (i.e., interfacial failure) is critical for automotive crashworthiness. This paper investigates effect hardness on behavior during tensile–shear test. AISI 1040 medium carbon steel, producing a high level mismatch welding, was selected as base metal. By ex situ tempering heat treatment, various levels are a...

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