2026-04-17T14:50:29Zhttps://recercat.cat/oai/request
oai:recercat.cat:10256/216742025-03-15T03:29:22Zcom_2072_452955com_2072_2054col_2072_453061
RECERCAT author Tarhouni, Ilef author Frómeta Gutiérrez, David author Casellas, Daniel author Costa i Balanzat, Josep author Maimí Vert, Pere 2022-07 The essential work of fracture methodology (EWF) has been successfully adopted to evaluate the fracture toughness of various metals and polymers. However, some aspects of the methodology are still far less understood, such as the influence of the experimental parameters on EWF measurement in thin metal sheets. In the present paper, the ligament range criterion of the EWF approach was revised for several advanced high-strength steels (AHSS). The validity of the upper and lower ligament length limits given by the ESIS protocol is redefined and rationalized according to the necking capability and the plasticity behaviour of the different AHSS grades. The work provides a new criterion to define the minimum ligament length to be tested, based on the minimum distance required by the crack to fully develop the necking capability of the material. The width constraint is too restrictive and has no effect on the deviation from linearity in the upper range. On the other hand, the maximum ligament length is proven to be controlled by the size of the plastic zone as proposed by the ESIS protocolI.T. is a fellow of Eurecat’s “Vicente López” PhD grant program. This work was partially funded by the Catalan Government through the funding grant ACCIÓ-Eurecat (project OptiLightMat). The research leading to these results has received funding from the European Union’s Research Fund for Coal and Steel program under grant agreement No. 101034036 – ToughSteel projectOpen Access funding provided thanks to the CRUE-CSIC agreement with Elsevier Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Polímers -- Fractura Polymers -- Fracture Metalls -- Fractura Metals -- Fracture Acer -- Fractura Steel -- Fracture Mecànica de fractura Fracture mechanics Assessing the effect of the experimental parameters in the evaluation of the essential work of fracture in high-strength thin sheets info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion peer-reviewed