نتایج جستجو برای: trapezoidal cyclic loading

تعداد نتایج: 173594  

Journal: :International Journal for Research in Applied Science and Engineering Technology 2020

2008
S. Lenart

A short-term flow, kind of softening of soil during cyclic loading, makes a perceivable impact on strain progression in saturated soil during cyclic loading. A short-term flow developed during cyclic mobility of soil can be seen from the stress-strain relationship observed during cyclic triaxial tests. After few cycles of loading soil starts to exhibit very low stiffness at the beginning of a l...

Journal: :Journal of Geotechnical and Geoenvironmental Engineering 2017

Journal: :Clinical biomechanics 2007
Heather Hoops Bing-He Zhou Yun Lu Moshe Solomonow Vikas Patel

BACKGROUND The epidemiology identifies cyclic lumbar loading as a risk factor for cumulative trauma disorder. Experimental biomechanical and physiological confirmation is lacking. The objective of this study was to asses the impact of different rest durations applied between periods of cyclic loading on the development of an acute lumbar disorder which, if continued to be subjected to loading, ...

Journal: :avicenna journal of dental research 0
z khamverdi associate professor, dental research center, department of operative dentistry, dental faculty, hamadan university of medical sciences, hamadan, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی همدان (hamadan university of medical sciences) y sadeghi post-graduate student, department of operative dentistry, dental faculty, hamadan university of medical sciences, hamadan, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی همدان (hamadan university of medical sciences) t omidipoor post-graduate student, department of operative dentistry, dental faculty, hamadan university of medical sciences, hamadan, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی همدان (hamadan university of medical sciences) f nasr post-graduate student, department of operative dentistry, dental faculty, hamadan university of medical sciences, hamadan, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی همدان (hamadan university of medical sciences) sh kasraei associate professor, dental research center, department of operative dentistry, dental faculty, hamadan university of medical sciences, hamadan, iran.; associate professor, dental research center, department of operative dentistry, dental faculty, hamadan university of medical sciences, hamadan, iran. , 989123481767سازمان اصلی تایید شده: دانشگاه علوم پزشکی همدان (hamadan university of medical sciences)

statement of the problem : tooth restorations are exposed to stresses which produce marginal gaps resulting in microleakage. purpose in this study, microleakage of light-cured glass-ionomer and compomer class v restorations was evaluted and compared under cyclic loading materials and methods in this exprimental study, class v cavities were prepared on the buccal surfaces of maxillary premolars ...

2015
Woong-Rae Cho Yoon-Hyuk Huh Chan-Jin Park Lee-Ra Cho

PURPOSE The aim of this study was to evaluate the effect of cyclic loading and screw retightening on reverse torque value (RTV) in external and internal type implants. MATERIALS AND METHODS Cement-retained abutments were connected with 30 Ncm torque to external and internal type implants. Experimental groups were classified according to implant connection type and retightening/loading protoco...

Journal: :International Journal of Geosynthetics and Ground Engineering 2016

2014
Sundar Srinivasan Dewayne Threet Leah E. Worton Brandon J. Ausk Steven D. Bain Edith M. Gardiner Ronald Y. Kwon Ted S. Gross

Age-related decline in periosteal adaptation negatively impacts the ability to utilize exercise to enhance bone mass and strength in the elderly. We recently observed that in senescent animals subject to cyclically applied loading, supplementation with Cyclosporin A (CsA) substantially enhanced the periosteal bone formation rates to levels observed in young animals. We therefore speculated that...

Journal: :Stem cells 2004
C-Y Charles Huang Kristen L Hagar Lauren E Frost Yubo Sun Herman S Cheung

The objective of this study was to examine the effects of cyclic compressive loading on chondrogenic differentiation of rabbit bone-marrow mesenchymal stem cells (BM-MSCs) in agarose cultures. Rabbit BM-MSCs were obtained from the tibias and femurs of New Zealand white rabbits. After the chondrogenic potential of BM-MSCs was verified by pellet cultures, cell-agarose constructs were made by susp...

In this study, dynamic bearing capacity of adjacent shallow strip foundations located on sandy soil was examined using a numerical finite difference modeling, FLAC. The behavioral interference of shallow strip foundations under different conditions was investigated. The effect of soil strength parameters, geometric characteristics of shallow foundations and cyclic loads at different distance ra...

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