Coupled methods for detecting fatigue damage in thin-walled composite structures with different types of notches.

Patryk Różyło, Jakub Paśnik, Marek Barski, Adam Stawiarski, Paweł J Romanowicz, Małgorzata Chwał

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Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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6 authors.

Patryk RóżyłoDepartment of Machine Design and Mechatronics, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618, Lublin, Poland. p.rozylo@pollub.pl.

Jakub PaśnikDepartment of Machine Design and Mechatronics, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618, Lublin, Poland.

Marek BarskiDepartment of Machine Design and Composite Structures, Faculty of Mechanical Engineering, Cracow University of Technology, Warszawska 24, 31-155, Cracow, Poland.

Adam StawiarskiDepartment of Machine Design and Composite Structures, Faculty of Mechanical Engineering, Cracow University of Technology, Warszawska 24, 31-155, Cracow, Poland.

Paweł J RomanowiczDepartment of Machine Design and Composite Structures, Faculty of Mechanical Engineering, Cracow University of Technology, Warszawska 24, 31-155, Cracow, Poland.

Małgorzata ChwałDepartment of Machine Design and Composite Structures, Faculty of Mechanical Engineering, Cracow University of Technology, Warszawska 24, 31-155, Cracow, Poland.

Funding

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6 · The paper itself

Abstract

The paper focused on the fatigue testing of thin-walled composite structures with notches. The fatigue experiments were supported by non-destructive diagnostic techniques, including thermography, acoustic emission, and digital microscopy. The study analysed the influence of notch geometry on the initiation and evolution of damage in CFRP (carbon fiber reinforced polymer) specimens with a [0/45/-45/90]s lay-up. All specimens were tested under identical fatigue loading conditions. Within the scope of the research, quantitative characteristics of thin-walled structures under fatigue loading were developed, and the recorded damage mechanisms were examined qualitatively. The combination of interdisciplinary research methods made it possible to carry out a thorough analysis of composite structure behaviour. Tests involving the complete failure of the specimens were not conducted. Instead, the study focused on the detection and monitoring of early stages of damage within the low-cycle fatigue regime. The application of coupled diagnostic methods for detecting and monitoring fatigue damage made it possible to investigate the differences in damage initiation and development between specimens with U-shaped and V-shaped notches.

Indexed as

CFRP compositesDamageExperimental studyFatigueNDT methodsNotches

Identifiers

PMID41974829

DOI10.1038/s41598-026-48942-0

PMCPMC13234284

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