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March 2, 3 & 4, 2027
Halls 19, 20 and 21, Deutsche Messe, Hannover, Germany

March 2, 3 & 4, 2027
Halls 19, 20 and 21, Deutsche Messe, Hannover, Germany

Tire Technology Expo Conference

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High cycle testing at high speed under bending for fretting and adhesion fatigue testing of OTR reinforcement cords

03 Mar 2026
Casablanca
Reinforcement – developments in performance, sustainability, materials and manufacturing
Higher-strength and stiffness OTR reinforcement uses fine, highest-grade filaments of PCR/TBR. But the more complex constructions are sensitive to analog fretting and adhesion fatigue issues. Despite being bigger, the tires have lower inflation pressure; contact with the irregular terrain induces similar dynamic fretting and adhesion fatigue issues in the belt region. Fast time-to-market 10+Mcycle HCF fatigue testing is achieved with integrated sample cooling. The 'remaining strength' UTS test after predefined degradation uses 'slipping' clamps with low 'in-clamp breaks' on rubberized cords extracted from test samples or used tires. Dual-layer steel cord only samples are 'staggered'.
  • Specificity of OTR shoeshine fretting and adhesion fatigue testing versus PCR/TBR
  • Relevant effect of sample cooling on the maximum test speed
  • Staggered dual-layer sample concept
  • Design rules for innovative CBS 'slipping' clamping system
Speakers
Philippe van Bogaert, CEO - Bogimac Material Fatigue Testing Equipment

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