2026-04-03T22:15:40Zhttps://recercat.cat/oai/requestoai:recercat.cat:10256/262132025-02-04T00:07:13Zcom_2072_452955com_2072_2054col_2072_453061
RECERCAT
author
Subramani, Anbazhagan
author
Maimí Vert, Pere
author
Guerrero Garcia, José Manuel
author
Costa i Balanzat, Josep
2025-02-04T00:07:13Z
2025-02-04T00:07:13Z
2023-12
http://hdl.handle.net/10256/26213
Quasi-brittle materials like composites are notch-sensitive, and the stress concentration factor (Kt) determines their strength knock-down. To alleviate this notch sensitivity, researchers are pursuing pseudo-ductility to stimulate stress redistribution around the notches. However, how such a pseudo-ductile material reduces Kt or improves the nominal strength (Sn) in notched sub-components (centre crack, elliptical hole and open hole) is unclear. In this work, we analytically determine the Kt of typical notched specimens made of an idealised pseudo-ductile material and show its accuracy using Finite Element (FE) models. Kt increases after the specimen transitions from localised yielding to net-section yielding. Then, we elucidate the size-effect behaviour of the notched sub-components using FE models. The study reveals that the notched pseudo-ductile specimens recover higher Sn than their linear elastic counterparts, in proportion to the Kt. However, pseudo-ductility decreases the Sn for smaller specimens, and the notch shape is unimportant in this region
Reconeixement-NoComercial-SenseObraDerivada 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0 info:eu-repo/semantics/openAccess
Materials compostos
Esforç i tensió
Elements finits, Mètode dels
Composite materials
Strains and stresses
Finite element method
Mecànica de fractura
Fracture mechanics
Concentració de tensions
Stress concentration
Nominal strength of notched pseudo-ductile specimens
info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion peer-reviewed