کناب رشته شیمی تجزیه
Adsorption analysis (تعادل و کینتیک)
اس فایل
مرجع دانلود فایل ,تحقیق , پروژه , پایان نامه , فایل فلش گوشیاس فایل
مرجع دانلود فایل ,تحقیق , پروژه , پایان نامه , فایل فلش گوشیAdsorption analysis (تعادل و کینتیک)
اختصاصی از اس فایل Adsorption analysis (تعادل و کینتیک) دانلود با لینک مستقیم و پر سرعت .
Adsorption analysis (تعادل و کینتیک)
Adsorption analysis (تعادل و کینتیک)
رساله دکتری با عنوان: Dynamic Finite Element Modeling and Analysis of Blast-resistant Sandwich Structures
اختصاصی از اس فایل رساله دکتری با عنوان: Dynamic Finite Element Modeling and Analysis of Blast-resistant Sandwich Structures دانلود با لینک مستقیم و پر سرعت .
رساله دکتری با عنوان: Dynamic Finite Element Modeling and Analysis of Blast-resistant Sandwich Structures
دانشگاه : University of Connecticut
استاد راهنما: Jeong-Ho Kim
پژوهشگر: Linhui Zhang
سال 2012
فرمت فایل: PDF و شامل 165 صفحه
چکیده:
Blast-resistant composites and structures are gaining more and more academic and industrial interests currently. The metal sandwich structure is proven to perform better than the monolithic plate with the same mass under blast loading. Besides, the foam or foam-like cores with stacking of graded layers can further mitigate the blast effects. In this work, the dynamic responses of corrugated sandwich plates with various homogeneous and graded core arrangements under shock tube loading are investigated by finite element method. By comparing the maximum back face deflection, maximum back face velocity, plastic energy absorption, stress history and contact force, the corrugated sandwich plate with the gradually graded core has a better overall performance.
The parametric study on unit-cell corrugated and trapezoid sandwich structures with given mass and various core arrangements subjected to idealized air-blast loading is also carried out. The sandwich structures with graded cores can prevent the structure to get fully crushed. It is also shown that the trapezoid sandwich structures have larger impact tolerance, but the trapezoid sandwich structures are more sensitive to the initial geometric imperfections than corrugated sandwich structures.
Due to the benefits of the graded cores, a modified rule of mixture and linear strain-rate dependence are used to derive the rate-dependent elastic-plastic constitutive relation for functionally graded (FG) material. The derived constitutive relations are implemented in ABAQUS/Explicit through a VUMAT subroutine to simulate the dynamic response of a FG plate subjected to shock tube loading.
مشاهده آنلاین و دریافت فایل نمونه:
https://drive.google.com/file/d/0B3BBM5yT_t4ZWkUxUGdNRzNLS0k
** توجه: خواهشمندیم در صورت هرگونه مشکل در روند خرید و دریافت فایل از طریق بخش پشتیبانی در سایت مشکل خود را گزارش دهید. **
رساله دکتری با عنوان: Dynamic Finite Element Modeling and Analysis of Blast-resistant Sandwich Structures
رساله دکتری با عنوان: Dynamic Finite Element Modeling and Analysis of Blast-resistant Sandwich Structuresدانشگاه : University of Connecticut
استاد راهنما: Jeong-Ho Kim
پژوهشگر: Linhui Zhang
سال 2012
فرمت فایل: PDF و شامل 165 صفحه
چکیده:
Blast-resistant composites and structures are gaining more and more academic and industrial interests currently. The metal sandwich structure is proven to perform better than the monolithic plate with the same mass under blast loading. Besides, the foam or foam-like cores with stacking of graded layers can further mitigate the blast effects. In this work, the dynamic responses of corrugated sandwich plates with various homogeneous and graded core arrangements under shock tube loading are investigated by finite element method. By comparing the maximum back face deflection, maximum back face velocity, plastic energy absorption, stress history and contact force, the corrugated sandwich plate with the gradually graded core has a better overall performance.
The parametric study on unit-cell corrugated and trapezoid sandwich structures with given mass and various core arrangements subjected to idealized air-blast loading is also carried out. The sandwich structures with graded cores can prevent the structure to get fully crushed. It is also shown that the trapezoid sandwich structures have larger impact tolerance, but the trapezoid sandwich structures are more sensitive to the initial geometric imperfections than corrugated sandwich structures.
Due to the benefits of the graded cores, a modified rule of mixture and linear strain-rate dependence are used to derive the rate-dependent elastic-plastic constitutive relation for functionally graded (FG) material. The derived constitutive relations are implemented in ABAQUS/Explicit through a VUMAT subroutine to simulate the dynamic response of a FG plate subjected to shock tube loading.
مشاهده آنلاین و دریافت فایل نمونه:
https://drive.google.com/file/d/0B3BBM5yT_t4ZWkUxUGdNRzNLS0k
** توجه: خواهشمندیم در صورت هرگونه مشکل در روند خرید و دریافت فایل از طریق بخش پشتیبانی در سایت مشکل خود را گزارش دهید. **
رساله دکتری با عنوان: Dynamic Finite Element Modeling and Analysis of Blast-resistant Sandwich Structures
مقاله ISI با عنوان: Analysis of a bridge failure due to fire using computational fluid dynamics and finite element models
اختصاصی از اس فایل مقاله ISI با عنوان: Analysis of a bridge failure due to fire using computational fluid dynamics and finite element models دانلود با لینک مستقیم و پر سرعت .
مقاله ISI با عنوان: Analysis of a bridge failure due to fire using computational fluid dynamics and finite element models
ژورنال: Engineering Structures
محتوای مقاله: آنالیز شکست پل در اثر حریق
پژوهشگران: J. Alos-Moya, I. Paya-Zaforteza, M.E.M. Garlock, E. Loma-Ossorio, D. Schiffner, A. Hospitaler
سال 2014
فرمت فایل: PDF و شامل 15 صفحه
چکیده:
Bridge fires are a major concern because of the consequences that these kind of events have and because they are a real threat. However, bridge fire response is under researched and not covered in the codes. This paper studies the capabilities of numerical models to predict the fire response of a bridge and provides modeling guidelines useful for improving bridge design. To reach this goal, a numerical analysis of the fire of the I-65 overpass in Birmingham, Alabama, USA in 2002 is carried out. The analyses are based on computational fluid dynamics (CFD) for creating the fire model, and finite element (FE) software for obtaining the thermo-mechanical response of the bridge. The models are validated with parametric studies that consider heat release rate of the spilled fuel, discretization of the fire temperature in the transition from CFD to FE modeling, and boundary conditions. The validated model is used in a study to evaluate the influence of fire scenario (CFD versus standard fires), and live load. Results show that numerical models are able to simulate the response of the bridge and can be used as a basis for a performance-based approach for the design of bridges under fire. Additionally, it is found that applying the Eurocode standard and hydrocarbon fires along the full length of the bridge does not adequately represent a real bridge fire response for medium-long span bridges such as this case study. The study also shows that live loads essentially do not influence the response of the bridge.
لینک مقاله در سایت www.sciencedirect.com :
http://www.sciencedirect.com/science/article/pii/S0141029614001151
** نحوه سفارش مقالات ISI: پس از پیدا کردن مقالات درخواستی خود از پایگاه‌های علمی همانند sciencedirect.com لینک مقالات مورد نظر خود را به ایمیل civil.sellfile.ir@gmail.com ارسال کرده پس از قرار گرفتن مقالات در سایت می توانید به صورت آنلاین اقدام به خرید و دریافت مقاله نمایید. **
** توجه: خواهشمندیم در صورت هرگونه مشکل در روند خرید و دریافت فایل از طریق بخش پشتیبانی در سایت مشکل خود را گزارش دهید. **
مقاله ISI با عنوان: Analysis of a bridge failure due to fire using computational fluid dynamics and finite element models
مقاله ISI با عنوان: Analysis of a bridge failure due to fire using computational fluid dynamics and finite element modelsژورنال: Engineering Structures
محتوای مقاله: آنالیز شکست پل در اثر حریق
پژوهشگران: J. Alos-Moya, I. Paya-Zaforteza, M.E.M. Garlock, E. Loma-Ossorio, D. Schiffner, A. Hospitaler
سال 2014
فرمت فایل: PDF و شامل 15 صفحه
چکیده:
Bridge fires are a major concern because of the consequences that these kind of events have and because they are a real threat. However, bridge fire response is under researched and not covered in the codes. This paper studies the capabilities of numerical models to predict the fire response of a bridge and provides modeling guidelines useful for improving bridge design. To reach this goal, a numerical analysis of the fire of the I-65 overpass in Birmingham, Alabama, USA in 2002 is carried out. The analyses are based on computational fluid dynamics (CFD) for creating the fire model, and finite element (FE) software for obtaining the thermo-mechanical response of the bridge. The models are validated with parametric studies that consider heat release rate of the spilled fuel, discretization of the fire temperature in the transition from CFD to FE modeling, and boundary conditions. The validated model is used in a study to evaluate the influence of fire scenario (CFD versus standard fires), and live load. Results show that numerical models are able to simulate the response of the bridge and can be used as a basis for a performance-based approach for the design of bridges under fire. Additionally, it is found that applying the Eurocode standard and hydrocarbon fires along the full length of the bridge does not adequately represent a real bridge fire response for medium-long span bridges such as this case study. The study also shows that live loads essentially do not influence the response of the bridge.
لینک مقاله در سایت www.sciencedirect.com :
http://www.sciencedirect.com/science/article/pii/S0141029614001151
** نحوه سفارش مقالات ISI: پس از پیدا کردن مقالات درخواستی خود از پایگاه‌های علمی همانند sciencedirect.com لینک مقالات مورد نظر خود را به ایمیل civil.sellfile.ir@gmail.com ارسال کرده پس از قرار گرفتن مقالات در سایت می توانید به صورت آنلاین اقدام به خرید و دریافت مقاله نمایید. **
** توجه: خواهشمندیم در صورت هرگونه مشکل در روند خرید و دریافت فایل از طریق بخش پشتیبانی در سایت مشکل خود را گزارش دهید. **
مقاله ISI با عنوان: Analysis of a bridge failure due to fire using computational fluid dynamics and finite element models
ترجمه مقاله: Engineering Properties and Correlation Analysis of Fiber Cementitious Materials
اختصاصی از اس فایل ترجمه مقاله: Engineering Properties and Correlation Analysis of Fiber Cementitious Materials دانلود با لینک مستقیم و پر سرعت .
ترجمه مقاله: Engineering Properties and Correlation Analysis of Fiber Cementitious Materials
فایل پی دی اف مقاله به همراه فایل ورد ترجمه
سال چاپ مقاله: 2014
«قسمتی از ترجمه»
عنوان:
خواص مهندسی و تحلیل همبستگی مصالح سیمانی فیبری
چکیده:
این مطالعه روی تأثیر میزان افزایش بخار سیلیکا و نسبت حجمی فیبر فولاد (رشته‌های فولادی) در خواص مهندسی مصالح سیمانی تمرکز می‌کند. متغیرهای آزمون شامل مقادیر استعمال بخار سیلیکا (5 درصد و 10 درصد)، نسبت آب به سیمان (35/0 و 55/0) و مقادیر استعمال رشته‌های فولادی (5/0 درصد، 1 درصد و 2 درصد) است. نتایج آزمایش عبارت‌اند از: مقاومت فشاری، مقاومت کششی مستقیم، مقاومت کششی شکافت، سایش سطح و آزمون وزن سقوطی که جمع‌آوری شدند تا تحلیل واریانس به‌منظور درک ارتباط و معنی‌داری بین پارامترهای مصالح و خواص مکانیکی مزبور انجام شود. نتایج آزمایش نشان داد که ...
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توجه: در صورتی که لازم است ابتدا فایل مقاله را دانلود کنید و آن را در اینترنت نیافته و یا نمیتوانید دانلود کنید، از طریق شماره تلفن همراه ذکر شده یا ایمیل majidagrimech88@yahoo.com درخواست کنید تا فایل مقاله برایتان ارسال گردد.
ترجمه مقاله: Engineering Properties and Correlation Analysis of Fiber Cementitious Materials