کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
509974 | 865730 | 2012 | 13 صفحه PDF | دانلود رایگان |
The current paper presents a new proposal to obtain regularized responses with distributed plasticity force-based frame elements under strain-softening response. It is based on an automatic, computationally efficient, commutation between integrations schemes, which ensures simultaneously a high degree of accuracy for hardening behavior and an objective response during the post-peak phase(s). Additionally, the varying values of the sectional forces can be directly accounted for in the estimation of the applicable characteristic length. Finally, a number of numerical examples illustrate the regularized performance of the element.
► New regularization technique for distributed plasticity force-based frame elements.
► High accuracy for hardening response and objectivity for post-peak phase ensured.
► Element integration weights are adaptively computed with interpolatory quadrature.
► Response-dependent characteristic lengths are shown to be efficiently modelled.
► Numerical applications exhibit superlinear convergence, typically quadratic.
Journal: Computers & Structures - Volumes 102–103, July 2012, Pages 1–13