From Fatigue Crack Growth to Particle Emission: Bridging Thomas Law and Tread Wear for Predictive CAE and Environmental Impact Assessment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F25%3A63601319" target="_blank" >RIV/70883521:28610/25:63601319 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

From Fatigue Crack Growth to Particle Emission: Bridging Thomas Law and Tread Wear for Predictive CAE and Environmental Impact Assessment

Popis výsledku v původním jazyce

This study advances the understanding of tire wear as a fracture-driven process, establishing a direct experimental link between Thomas-law fatigue crack growth (FCG) and tread wear particle generation, a growing environmental concern due to the emission of tire and road wear particles (TRWPs) classified as microplastics.Tire wear proceeds via crack initiation, cyclic propagation, and eventual particle detachment. Although Thomas’ 1958 law relates crack growth rate to tearing energy, its applicability to real-world rubber wear has not been fully validated. This work fills that gap by systematically analyzing NR/BR blends (filled with 50 phr carbon black, in blend ratios from 100/0 to 0/100).Advanced tests and tsting facilities the Intrinsic Stength Analyzer (ISA) determining fatigue threshold, T0, and Tear and Fatigue Analyzer (TFA) generated FCG curves describing crack growth behavior under controlled tearing energy. These were compared to abrasive wear (LAT-100) that simulate road-induced damage.A strong correlation was found between the fatigue threshold, FCG curves and wear mechanisms. This confirms that higher crack growth rates predict not only greater material loss but also larger TRWPs, providing a physics-based route for estimating particle size distribution relevant to environmental risk assessments.Therefore, these results deliver:-alidated fatigue and wear parameters for CAE-based tire life prediction;-insights into wear-resistant compound design;-tools for reducing TRWP emissions via virtual development workflows.

Název v anglickém jazyce

From Fatigue Crack Growth to Particle Emission: Bridging Thomas Law and Tread Wear for Predictive CAE and Environmental Impact Assessment

Popis výsledku anglicky

This study advances the understanding of tire wear as a fracture-driven process, establishing a direct experimental link between Thomas-law fatigue crack growth (FCG) and tread wear particle generation, a growing environmental concern due to the emission of tire and road wear particles (TRWPs) classified as microplastics.Tire wear proceeds via crack initiation, cyclic propagation, and eventual particle detachment. Although Thomas’ 1958 law relates crack growth rate to tearing energy, its applicability to real-world rubber wear has not been fully validated. This work fills that gap by systematically analyzing NR/BR blends (filled with 50 phr carbon black, in blend ratios from 100/0 to 0/100).Advanced tests and tsting facilities the Intrinsic Stength Analyzer (ISA) determining fatigue threshold, T0, and Tear and Fatigue Analyzer (TFA) generated FCG curves describing crack growth behavior under controlled tearing energy. These were compared to abrasive wear (LAT-100) that simulate road-induced damage.A strong correlation was found between the fatigue threshold, FCG curves and wear mechanisms. This confirms that higher crack growth rates predict not only greater material loss but also larger TRWPs, providing a physics-based route for estimating particle size distribution relevant to environmental risk assessments.Therefore, these results deliver:-alidated fatigue and wear parameters for CAE-based tire life prediction;-insights into wear-resistant compound design;-tools for reducing TRWP emissions via virtual development workflows.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů