کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
250725 502899 2016 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A serendipity plate element free of modeling deficiencies for the analysis of laminated composites
ترجمه فارسی عنوان
عنصر بشقابی سرخ مایل به قرمز بدون نقص مدل سازی برای تجزیه و تحلیل کامپوزیت های چند لایه
کلمات کلیدی
صفحات کامپوزیتی لمینیت، عنصر صفحه سرندیپیتی، علامت گذر شفت قفل برشی، حالت های انرژی صفر صفر، برش انگلی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی

An eight-node serendipity element free of shear locking and spurious zero-energy modes is formulated to model laminated composite plate problems. The element is based on a first-order shear deformation theory and on the equivalent lamina assumption. Stresses are calculated through the thickness of the plate. As the model is only capable of representing transverse shear strains and stresses as constants, while their actual variations are parabolic, a shear correction factor is used. The element is formulated using strain gradient notation, which is a physically interpretable notation that allows for a detailed a-priori analysis of the finite element model. The element’s shear strain polynomials are inspected, and the spurious terms which are responsible for shear locking are identified. The element is corrected by simply removing such spurious terms from those shear strain expansions. Further, the compatibility modes are also clearly identified and maintained in the shear strain expansions in order to prevent the introduction of spurious zero-energy modes. Numerical results show the shear locking effects caused by the spurious terms on displacement and transverse stress solutions. They also show that properly refined meshes composed of corrected elements provide solutions which converge rather well for moderately thick to thin plates.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composite Structures - Volume 154, 15 October 2016, Pages 150–171
نویسندگان
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