کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
252666 502969 2011 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An analytical assessment of the influence of skin imperfections on the indentation collapse mechanism in composite sandwich beams
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
An analytical assessment of the influence of skin imperfections on the indentation collapse mechanism in composite sandwich beams
چکیده انگلیسی

The influence of skin imperfections, in the form of delamination damage or thickness variations, on the indentation collapse mechanism in composite sandwich beams with compressive yielding cores is studied using the models of non-prismatic beam and beam-column resting on a nonlinear Winkler foundation. Upper and lower threshold solutions are derived for the indentation response and collapse load and the transition between the two limits is defined as a function of size, magnitude and position of the imperfections. In beams where global bending effects are not negligible, the collapse load is limited from above by the indentation collapse load of beams with rigid-plastic cores and the face wrinkling collapse load of beams with elastic cores; the transition between the two limits is controlled by material/structure properties and the magnitude of the imperfections. Characteristic lengths, which depend on material and geometrical properties, define the minimum size of the imperfections with the strongest effect on the solution and the minimum distance between load and imperfections with no effect on the solution.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composite Structures - Volume 94, Issue 1, December 2011, Pages 299–311
نویسندگان
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