کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
277083 1430198 2016 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Large deformation, damage evolution and failure of ductile structures to pulse-pressure loading
ترجمه فارسی عنوان
تغییر شکل بزرگ، تکامل آسیب و شکست ساختار های مجسمه به بارگیری فشار پالس
کلمات کلیدی
بارهای غیر ضروری، تغییر شکل بزرگ، حالت های خسارت شکل پالس، تقریب یانگدال
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی

In this paper, a model is developed for an elastic perfectly-plastic structural beam system subjected to general pulse-pressure loadings - this may be either impulsive or non-impulsive - which is capable of capturing large non-linear deformation, ductile damage evolution and its consequential failure. The proposed model is an extension of Schleyer and Hsu (2000) by incorporating interactions between bending, membrane stretch and transverse shear in the fully plastic stress state, and uses damage mechanics to capture the loss of integrity at the supports and the subsequent beam detachment. Predictions by the model were validated against existing experimental data from literature and to three-dimensional finite element models developed in this paper. Parametric studies were performed to elucidate the effects of loading duration on the mode of deformation by the beam and the critical conditions governing their transition. The efficacy of Youngdahl’s (1970; 1971) technique on desensitising pulse shape effects is also investigated using different pressure pulse profiles and it will be shown that the technique is successful only for monotonically decaying pulse-pressures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Solids and Structures - Volume 96, 1 October 2016, Pages 320–339
نویسندگان
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