2026-05-31T08:22:00Zhttps://riuma.uma.es/rest/oai/request

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

00925njm 22002777a 4500 dc Baena Oliva, María Del Carmen author García-Sánchez, Felipe author Sáez, Andrés author 2023-09-30 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. 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 Deformaciones y tensiones Discontinuous quarter-point boundary elements revisited: Computation of T-stress in two-dimensional cracked components