Review of the strain-based formulation for analysis of plane structures Part II: Evaluation of the numerical performance

Iranian Journal of Numerical Analysis and Optimization

مقاله 12، دوره 11، شماره 2 - شماره پیاپی 20، پاییز و زمستان 2021، صفحه 485-511  

نوع مقاله: Research Article

شناسه دیجیتال (DOI): 10.22067/ijnao.2021.70940.1051

نویسندگان

M. Rezaiee-Pajand ¹؛ Nima Gharaei-Moghaddam²؛ M. Ramezani³

¹Professor of Civil Engineering, School of Engineering, Ferdowsi University of Mashhad, Iran.

²PhD of Structural Engineering, School of Engineering, Ferdowsi University of Mashhad, Iran

³PhD Student of Structural Engineering, School of Engineering, Ferdowsi University of Mashhad, Iran.

چکیده

In this part of the study, several benchmark problems are solved to evalu ate the performance of the existing strain-based membrane elements, which were reviewed in the first part. This numerical evaluation provides a basis for comparison between these elements. Detailed discussions are offered after each benchmark problem. Based on the attained results, it is con cluded that inclusion of drilling degrees of freedom and also utilization of higher-order assumed strain field result in higher accuracy of the elements. Moreover, it is evident that imposing the optimal criteria such as equilib rium and compatibility on the assumed strain field, in addition to reducing the number of degrees of freedom of the element, increases the convergence speed of the resulting strain-based finite elements.

کلیدواژه‌ها

Strain-based formulation؛ Higher-order strain field؛ Equilibrium condition؛ Numerical evaluation؛ Drilling degrees of freedom

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