Fatigue damage investigation of ultra-large tire components. (February 2019)

• Record Type: Journal Article
• Authors: Nyaaba, Wedam; Frimpong, Samuel; Anani, Angelina
• Is Part Of: International journal of fatigue. Volume 119(2019)
• Page Start: 247
• Page End: 260
• Publication Date: 2019-02
• Subjects: Cracking energy density -- Fatigue crack growth -- Tire -- Finite element analysis -- Strain-induced crystallization; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2018.07.009
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: Tire temperature increases with increasing speed and axle load conditions. Ultra-class tire heat transfer problem is mainly a conduction problem. Cracks tend to occur on the planes that get the most damage. Strain-induced crystallization can lead to durability improvement in NR compounds. The belt endings are more susceptible to crack initiation and subsequent failure. Abstract: Off-road ultra-large tires experience different modes of heat-related fatigue failure in operation due to inherent material defects that grow into visible cracks under service loads. This study implements the cracking energy density theory to predict nucleation life of selected components of a 56/80R63 tire. The method uses an assumed intrinsic flaw, a fatigue crack growth law, and a rubber constitutive law to compute local crack driving forces from strain history loads obtained via FEA. The results show that the lower sidewall, belt endings, and inner tread lug corners are the critical regions for crack initiation with lives 5.03 × 10 5, 1.207 × 10 5, and 2.01 × 10 4 cycles, respectively.