Machine learning algorithm for rivet-squeezing force estimation based on the dynamic response of the joint

Vrtač, Tim (avtor), Pogačar, Miha (avtor), Kodrič, Miha (avtor), Čepon, Gregor (avtor)

The rivet-squeezing force is one of the most influential parameters affecting the performance of a riveted joint. It directly affects the stress distribution near the joint, influencing mechanical properties, fatigue life, and failure mechanisms. Ensuring control over this parameter is therefore essential for product quality. Our prior research has shown that the squeezing force can be estimated post-production by analyzing the dynamic response of the joint - an approach that enables quality control even during later stages of a product’s lifecycle. Adequacy of the riveted joint’s mechanical performance is then estimated through comparison of the riveting force estimate to the desired reference value. Traditional methods rely on the similarity between the dynamic response of the observed joint and those of reference joints with known rivet-squeezing forces. This paper proposes an improved methodology that replaces the similarity-based criterion with a Machine Learning (ML) algorithm to enhance estimation robustness. As in the conventional method, dynamic substructuring is used to isolate the joint’s response from the surrounding assembly, enabling the application of the same ML model across different assemblies - provided that the material, geometric, and frictional properties near the joint remain consistent. The proposed method is validated through a laboratory case study and benchmarked against the existing LAC-based estimation approach. The case study results demonstrate improved robustness and broader generalization against the LAC-based approach. This indicates that the advanced inference capabilities allow the ML model to better distinguish the effects of the rivet-squeezing force from variations caused by material inconsistencies, minor changes in process parameters, or sensor placement compared to the LAC-based approach. The key challenge for the ML-based approach is to acquire a sufficiently large and representative dataset for the ML model training.

• Jezik: Angleški jezik
• Ključne besede: rivet, rivet-squeezing force, dynamic substructuring, machine learning, quality control
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: 23 str.
• Številčenje: Vol. 241, [article no.] 113478
• PID: 20.500.12556/RUL-175088
• UDK: 621
• ISSN pri članku: 1096-1216
• DOI: 10.1016/j.ymssp.2025.113478
• COBISS.SI-ID: 253296387
• Datum objave v RUL: 15.10.2025

Gradivo je del revije

• Naslov: Mechanical systems and signal processing
• Skrajšan naslov: Mech. syst. signal process.
• Založnik: Elsevier
• ISSN: 1096-1216
• COBISS.SI-ID: 15296283

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: kovica, sila stiskanja kovice, dinamsko podstrukturiranje, strojno učenje, nadzor kakovosti