نتایج جستجو برای: energy release rate

تعداد نتایج: 1750353  

Journal: :International Journal of Solids and Structures 2007

Journal: :Journal of Physics: Conference Series 2013

Journal: :Structural and Multidisciplinary Optimization 2018

Journal: :مهندسی سازه 0
مهدی شهابی علمدار

concrete is one of the most widely used materials in construction industry. many large and important structures such as power plants, bridges, dams and buildings employ concrete as main material. propagation of crack is considered one of the main reasons in failure of concrete structures. the process of formation and crack growth is one of the major and complex issues in concrete, because concr...

Journal: :مهندسی بیوسیستم ایران 0
هادی الماسی استادیار گروه علوم و صنایع غذایی دانشکدۀ کشاورزی دانشگاه ارومیه بابک قنبرزاده دانشیار گروه علوم و صنایع غذایی دانشکدۀ کشاورزی دانشگاه تبریز جلال دهقان نیا استادیار گروه علوم و صنایع غذایی دانشکدۀ کشاورزی دانشگاه تبریز علی اکبر انتظامی استاد گروه شیمی پلیمر دانشکدۀ شیمی دانشگاه تبریز اصغر خسروشاهی اصل استاد گروه علوم و صنایع غذایی دانشکدۀ کشاورزی دانشگاه ارومیه

a poly(lactic acid) (pla) based nanocomposite active packaging has been developed for the controlled release of tert-butylhydroquinone (tbhq) antioxidant. pla based active films were loaded with tbhq (3%wt) or mixture of modified cellulose nanofiber (mcnf) (8%wt) and tbhq (3%wt) to obtain active and nanocomposite active films, respectively. release studies indicated that the release rate of tbh...

Delamination fracture of a two-dimensional functionally graded multilayered four-point bending beam that exhibits non-linear behaviour of the material is analyzed. The fracture is studied analytically in terms of the strain energy release rate. The beam under consideration has an arbitrary number of layers. Each layer has individual thickness and material properties. A delamination crack is loc...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1389

here, we report analysis of in vitro and in vivo drug release from an in situ formulation consisting of triamcinolone acetonide (tr) and poly(d,l-lactide-co-glycolide) (plga) and the additives glycofurol and hydroxyapatite nanoparticles (ha). we found that these additives enhanced drug release rate. we used the taguchi method to predict optimum formulation variables to minimise the initial burs...

Journal: :International Journal of Non-Linear Mechanics 2012

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