Mohammad Javad Rezvani
Department of Mechanical Engineering, Semnan Branch, Islamic Azad University, Semnan, Iran.
[ 1 ] - Structural Analysis of Unsymmetric Laminated Composite Timoshenko Beam Subjected to Moving Load
The structural analysis of an infinite unsymmetric laminated composite Timoshenko beam over Pasternak viscoelastic foundation under moving load is studied. The beam is subjected to a travelling concentrated load. Closed form steady state solutions, based on the first-order shear deformation theory (FSDT) are developed. In this analysis, the effect of bend-twist coupling is also evaluated. Selec...
[ 2 ] - Investigation of the effect of buckling initiator on energy absorption of thin-walled circular tubes by using of numerical simulation
Cylindrical thin-walled tubes due to construction and easy installation, high energy absorption capacity are used in the automotive industry as an impact energy absorber. However, the main weakness of cylindrical tubes is in the high initial peak load. Therefore, in this paper, to overcome this weakness, a buckling initiator is used at the top of the tube. This buckling initiator is a steel rod...
[ 3 ] - جذب انرژی درضربه گیرهای شیاردار پرشده از فوم پلی اورتان بااستفاده ازآغازگر
در این مقاله، اثر آغازگر در پاسخ لهیدگی ضربه‌گیرهای شیاردار خارجی پرشده از فوم پلی‌اورتان بررسی می‌شود. به این منظور، یک آغازگر در بالای لوله استوانه‌ای شیاردار خارجی پرشده از فوم قرار می‌گیرد تا از اعمال نیروی ناگهانی به قسمت اصلی سازه جلوگیری کند. در این ایده جدید، برای مطالعه مشخصات ضربهپذیری، تعدادی شبیه‌سازی عددی در نرمافزار آباکوس به صورت شبه استاتیک انجام شده و با نتایج تجربی مقایس...
[ 4 ] - Experimental and Numerical Simulation Investigation on Crushing Response of Foam-Filled Conical Tubes Stiffened with Annular Rings
In this paper, crashworthiness characteristics of conical steel tubes stiffened by annular rings and rigid polyurethane foam are investigated. For this purpose, wide circumferential rings are created from the outer surface of the conical tube at some determined areas along tube length. In fact, this method divides a long conical tube into several tubes of shorter length. When this structure is ...
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