نتایج جستجو برای: short term creep

تعداد نتایج: 897485  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1391

در بسیاری از کاربردها مسئله زمان عاملی تعیین کننده است، به طوری که خروجی سیستم در هر لحظه تابعی از ورودی سیستم و نیز خروجی سیستم در زمان های قبل می باشد. در بعضی موارد، خروجی سیستم حتی ممکن است به ورودی سیستم در زمان های قبل هم بستگی داشته باشد. برای مدل کردن چنین سیستم هایی به وسیله شبکه های عصبی، بازنمایی زمان در عملکرد این شبکه ها اجتناب ناپذیر است. زمان به دو صورت در عملکرد شبکه های عصبی قا...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم انسانی 1390

this study attempted to explore if teaching english collocations through two different modes of awareness-raising and input flooding has any possible differential effect on immediate retention as well as retention in a delayed assessment. it also compared the possible differential effect of teaching english collocations implicitly and explicitly on actively using the items in writing. m...

Journal: :Polymer Engineering and Science 2022

Maleic anhydride-grafted-polyethylene was dynamically cross-linked via reactive melt blending with 4,4?-dithiodianiline. Thermal and mechanical properties of polyethylene vitrimers different cross-linking density were investigated. The results indicate that the degree crystallinity decreased increasing density. This behavior directly related to short-term long-term properties: showed a decrease...

Journal: :Journal of the Society of Materials Science, Japan 1973

Journal: :Composite Structures 2022

In this work, the time-dependent mechanical behavior of a short carbon fiber-reinforced PEEK is investigated at temperatures near and above glass transition temperature for stresses below damage threshold. An experimental procedure including creep/recovery tests dynamic was carried out by varying stress levels, fiber orientation. The shown to be linear viscoelastic Effect orientation on elastic...

Journal: :Wood Material Science and Engineering 2022

Thermo-hydro-mechanical (THM) densification is a well-known procedure for improving the properties of low-density wood species, but long-term behaviour densified under constant load has not been reported and may restrain its use in construction. This study investigated influence THM on creep bending beech pine climatic conditions. The specimens were loaded three-point at applied stress level 35...

Journal: :Geotextiles and Geomembranes 2022

In this paper, to investigate the impact of environmental loadings on short-term and creep mechanical characteristics different types clayey soil-Geocomposite Drainage Layers (GDL) interfaces, a series rapid loading shear tests were conducted Mercia Mudstone Clay-GDL interfaces Kaolin subjected drying-wetting cycles, thermal cycles elevated temperature, etc, using bespoke temperature stress-con...

2017
Jacques Précigout Cécile Prigent Laurie Palasse Anthony Pochon

Water plays an important role in geological processes. Providing constraints on what may influence the distribution of aqueous fluids is thus crucial to understanding how water impacts Earth's geodynamics. Here we demonstrate that ductile flow exerts a dynamic control on water-rich fluid circulation in mantle shear zones. Based on amphibole distribution and using dislocation slip-systems as a p...

2015
Yong-Jae Kim Tae Gwang Yun In-Chul Choi Sungwoong Kim Won Il Park Seung Min Han Jae-il Jang

Nanoscale time-dependent mechanical-electrical coupled behavior of single crystal ZnO nanorods was systematically explored, which is essential for accessing the long-term reliability of the ZnO nanorod-based flexible devices. A series of compression creep tests combined with in-situ electrical measurement was performed on vertically-grown single crystal ZnO nanorods. Continuous measurement of t...

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