توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Nonlinear dynamic analysis of laminated composite spherical shells under the pulsating loading by Chebyshev collocation methods
نویسنده(ها): ، ، ،
اطلاعات انتشار: نهمین کنگره بین المللی مهندسی عمران، سال
تعداد صفحات: ۸
This article is concerned with the nonlinear dynamic analysis and response of composite spherical shells under the dynamic loading, with Chebyshev collocation methods. So the application of caps have significant growth in civil structure in recent years and since the surface of caps constitute of spherical shells, the investigation of spherical shell in particular composite one have high beneficial to designing. The theoretical formulations are based on the FSDT in which the nonlinear equation given by Novozhilov. This analysis is carried out using Chebyshev collocation methods to study the governing equation of composite spherical shells. These governing equations turn into the incremental form and then solved by using the orthogonal collocation point methods besides using the Newmark method and iteration scheme for obtain the displacement under the various pulsating loading. The validity of the analytical response is demonstrated by comparing the present results with those available in the literature and finite element analysis model in ABAQUS. The effect of different pulsating loading, thickness per radius, number of layers and boundary conditions on the nonlinear dynamic analysis on composite spherical shells are investigated<\div>

۲Experimental and numerical studies of the mechanical behavior of mollusk shells
نویسنده(ها): ، ، ،
اطلاعات انتشار: کنفرانس دو سالانه بین المللی مکانیک جامدات تجربی، سال
تعداد صفحات: ۹
This paper presents a combination of experimental and numerical techniques to investigate the mechanical behavior of mollusk shells. For this purpose, primary models of the shells are developed based on the governing mathematical equations. The intersection points on the surface of the shell models are numerically identified and then employed to remove the extra interior parts. The non–uniform rational B–spline (NURBS) equations that represent the mollusk shell surface are generated using the curve fitting method. The advancing front technique is used to generate the adaptive finite element (FE) mesh over the shell. The final 3D generated meshed models accurately describe the spatial configuration of the mollusk shells as well as their interior architectures. Experimental X–rays imaging technique is utilized to show the similarity between the developed models and the real samples. Scanning electron microscopy (SEM) is employed to provide information on the microstructure of the shells. Experimental compression tests are conducted to provide comparisons between the mechanical behavior of models and mollusk shell samples under external loading conditions. The results of this work may be useful in the design of new engineering structures.<\div>
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