The simulation of concrete materials using a damage model combined with an advanced discretization meshless technique

• Type: Chapter or Part of a Book
• Date: 2017

Authors

Behzad V. Farahani (Author) Other; Jorge Belinha (Author) Other; Francisco M. Andrade Pires (Author) FEUP; Pedro M. G. Moreira (Author) Other

Book

Title: Material Modelling: Applications, Challenges and Research

Pages: 249-303

ISBN: 9781536121926; 9781536121612

Indexing

Scopus - 5 Citations

Other information

Authenticus ID: P-00N-9BV

Abstract (EN): The accurate computational simulation of concrete structures is very important to achieve high performances in civil engineering design. Thus, it is important to investigate new numerical techniques to predict the non-linear behaviour of such relevant materials. Thus, in this work, an advanced discretization meshless approach, based on radial basis functions, is exerted to numerically analyse concrete materials using a non-linear continuum damage model. First, the 2D plane stress RPIM formulation is elaborated to a rate-independent standard (local) damage model respecting both tensile and compressive behaviours. Additionally, the foregoing local damage formulation is extended to a non-local constitutive damage criterion considering a Helmholtz free energy function. The internal variable fields, such as local and non-local damage parameters, are evaluated within a return-mapping damage routine. Due to the inherent non-linearity of the phenomenon, a Newton-Raphson iterative approach is adopted to obtain the non-linear damage solution. The performance of the proposed non-local damage model is assessed with relevant experimental tests of concrete structures available in the literature. The obtained results imply that the numerical technique here proposed has the potential to effectively analyze concrete structures assuming a non-linear non-local continuum damage model. The present computational analysis is capable of producing encouraging results, verifying the validity of the non-local damage variables and stress field with the experimental solution. © 2017 Nova Science Publishers, Inc.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 55