کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
785768 1465363 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the plastic bifurcation and post-bifurcation of axially compressed beams
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
On the plastic bifurcation and post-bifurcation of axially compressed beams
چکیده انگلیسی

The paper presents two new results in the domain of the elastoplastic buckling and post-buckling of beams under axial compression. (i) First, the tangent modulus critical load, the buckling mode and the initial slope of the bifurcated branch are given for a Timoshenko beam (with the transverse shear effects). The result is derived from the 3D J2 flow plastic bifurcation theory with the von Mises yield criterion and a linear isotropic hardening. (ii) Second, use is made of a specific method in order to provide the asymptotic expansion of the post-critical branch for a Euler–Bernoulli beam, exhibiting one new non-linear fractional term. All the analytical results are validated by finite element computations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Non-Linear Mechanics - Volume 46, Issue 5, June 2011, Pages 693–702
نویسندگان
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