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oai:riuma.uma.es:10630/286862026-02-03T11:11:35Zcom_10630_2254col_10630_37953

Discontinuous quarter-point boundary elements revisited: Computation of T-stress in two-dimensional cracked components Baena Oliva, María Del Carmen García-Sánchez, Felipe Sáez, Andrés Deformaciones y tensiones T-stress Stress intensity factors Dual Boundary Element Method (BEM) Fracture mechanics Discontinuous quarter-point element This paper analyzes the use of discontinuous quarter-point quadratic elements in a dual or hypersingular boundary element context to compute the T-stress for cracked 2-D isotropic components. The performance of this approach has been demonstrated in the past for stress intensity factors (SIFs) computation and, herein, it is revisited to assess its adequacy for T-stress evaluation. To this end, novel direct extrapolation formulas that determine the T-stress from the computed nodal displacements at the collocation nodes of the discontinuous quarter-point element are proposed, and their accuracy and effectiveness is satisfactorily tested by several numerical examples involving 2-D cracked Carbon NanoTube (CNT) reinforced composites. SIFs extrapolated from the computed nodal crack opening displacements and T-stress evaluated from the computed stresses at internal points (close to the crack-tip) are also presented for completeness. The proposed techniques are a valid and easy-to-implement alternative to the interaction integral approaches when determining SIFs and T-stress. Ministerio de Ciencia, Innovación y Universidades de España. The European Regional Development Fund. Consejería de Economía y Conocimiento de Andalucía. Proyectos RTI2018-094945-B-C21 y P18-RT-3128. Financiación parcial de los costes de acceso abierto: Universidad de Málaga / CBUA. Funding for open Access charge: Universidad de Málaga / CBUA 2024-01-11T13:34:25Z 2024-01-11T13:34:25Z 2023-09-30 journal article VoR C. Baena, F. García-Sánchez, A. Sáez, Discontinuous quarter-point boundary elements revisited: Computation of T-stress in two-dimensional cracked components, Theoretical and Applied Fracture Mechanics, Volume 128, 2023, 104105, ISSN 0167-8442, https://hdl.handle.net/10630/28686 10.1016/j.tafmec.2023.104105 eng Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ open access application/pdf Elsevier Ltd.