2026-04-13T00:49:03Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/251172024-10-29T20:29:19Zcom_2072_452955com_2072_2054col_2072_453061

00925njm 22002777a 4500 dc Guerrero Garcia, José Manuel author González Juan, Emilio Vicente author Artero Guerrero, José Alfonso author Cimadevilla, Adrián author Rodríguez-Sereno, J.M. author Mayugo Majó, Joan Andreu author De Blanpre, Elisabeth author Jacques, Vincent author 2024-11 Under static loading, measuring experimentally the mode II and mixed mode fracture toughness of composite materials and adhesive joints is well standardised. However, under dynamic loading, no standard procedure has been defined yet. Therefore, this paper proposes an experimental methodology to measure the mode II and mixed mode interlaminar fracture toughness of composite materials and adhesive joints. The methodology is based on a modified split Hopkinson compression bar. Two different data reduction schemes are explored and compared, one based on measuring the crack length, and another based on measuring the force from the strains in the transmitted bar. The two data reduction methods provided considerably different results. By using the method based on measuring the force, the mode II and mixed mode fracture toughness for both interlaminar and adhesive joints decreased for higher strain rates, while the opposite was found with the other approach. The method based on the crack length measurement was deemed to be unreliable due to the difficulties in measuring it This work was carried out under the framework of the EU H2020 Clean Sky 2 Project BEDYN - Development of a methodology (test, measurement, analysis) to characterise the BEhaviour of composite structures under DYNamic loading, developed within the consortium of AMADE research group from the University of Girona, the University of Carlos III of Madrid and the company COMPOXY, with Dassault Aviation being the project topic manager. This work has received funding from the Clean Sky 2 Joint Undertaking (JU) under grant agreement No. 886519. The JU receives support from the European Union’s Horizon 2020 research and innovation programme and the Clean Sky 2 JU members other than the Union. José M. Guerrero would also like to acknowledge the funding of the post-doc grant Margarita Salas with reference REQ2021_A_15, financed by the Spanish ‘Ministerio de Universidades’ and the European Union - Next GenerationEU Open Access funding provided thanks to the CRUE-CSIC agreement with Elsevier http://hdl.handle.net/10256/25117 Resistència de materials Strength of materials Assaigs de materials Materials -- Testing Juntures adhesives Adhesive joints Mecànica de fractura Fracture mechanics Experimental and virtual testing of mode II and mixed mode crack propagation under dynamic loading