2026-04-04T02:27:50Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/262132025-02-04T00:07:13Zcom_2072_452955com_2072_2054col_2072_453061

00925njm 22002777a 4500 dc Subramani, Anbazhagan author Maimí Vert, Pere author Guerrero Garcia, José Manuel author Costa i Balanzat, Josep author 2023-12 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 http://hdl.handle.net/10256/26213 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