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Analysis of additively manufactured notched PLA plates using failure assessment diagrams

Abstract: This paper provides a methodology for the estimation of the load-bearing capacity of additively manufactured (AM) PLA plates containing different types of notches (U-notches, V-notches and holes). The methodology is based on the use of Failure Assessment Diagrams (FADs), which are the main fracture-plastic collapse assessment tool provided by structural integrity assessment procedures, such as BS7910 and API 579-1/ASME FFS-1. When analyzing notch-type defects, the FAD methodology requires the application of a notch correction which, in this work, is based on the Theory of Critical Distances (TCD) and the Creager-Paris stress distribution ahead of the crack-tip. The results show that the FAD methodology can be efficaciously applied in this AM polymer, providing safe conservative estimations of critical loads in U-notched and V-notched plates, and accurate slightly unsafe estimations in plates with central hole. The cracking behavior in the different tested plates is a complex procedure generated by a combination of filament failures and debonding processes.

 Autoría: Cicero S., Arrieta S., Sánchez M., Castanon-Jano L.,

 Fuente: Theoretical and Applied Fracture Mechanics, 2023, 125, 103926

 Editorial: Elsevier

 Fecha de publicación: 01/06/2023

 Nº de páginas: 14

 Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.tafmec.2023.103926

 ISSN: 0167-8442,1872-7638

 Proyecto español: PID2021-122324NB-I00

 Url de la publicación: https://doi.org/10.1016/j.tafmec.2023.103926