Through thickness evolution of crack tip plasticity
Abstract
Experimental methods to measure fracture mechanics parameters tend to provide information from or about the surface of cracked components. However, information about the interior of the component is key to understanding the mechanisms governing the damage processes at a crack tip for both fatigue and fracture events. In this work we present a detailed numerical analysis of the evolution of the plastic zone through the thickness of an aluminium alloy specimen. This is done by means of ultra-fine non- linear finite element models. The simulated results are compared with experimental displacement data measured optically from the surface of the specimen.
Full text
FATIGUE 2017 13.2 THROUGH THICKNESS EVOLUTION OF CRACK TIP PLASTICITY D. Camas1, P. Lopez-Crespo1, F. V. Antunes2 &J. R. Yates3 Experimental methods to measure fracture mechanics parameters tend to provide information from or about the surface of cracked components. However, information about the interior of the component is key to understanding the mechanisms governing the damage processes at a crack tip for both fatigue and fracture events. In this work we present a detailed numerical analysis of the evolution of the plastic zone through the thickness RIDQDOXPLQLXPDOOR\VSHFLPHQ7KLVLVGRQHE\PHDQVRIXOWUD¿QHQRQ OLQHDU ¿QLWH HOHPHQW PRGHOV 7KH VLPXODWHG UHVXOWV DUH FRPSDUHG ZLWK experimental displacement data measured optically from the surface of the specimen. 1Department of Civil and Materials Engineering, University of Malaga, C/Dr Ortiz Ramos, s/n, 29071 Malaga, Spain 2Department of Mechanical Engineering, University of Coimbra, Portugal 3 Simuline Ltd., Derbyshire S18 1QD, UK