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

Document Type : Research Article

Authors

• M. Rezaiee-Pajand ¹
• Nima Gharaei-Moghaddam ²
• M. Ramezani ³

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

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

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

10.22067/ijnao.2021.70940.1051

Abstract

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.

Keywords

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

20.1001.1.24236977.2021.11.2.12.1

Main Subjects

• Numerical Analysis

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