China Plastics ›› 2018, Vol. 32 ›› Issue (03): 99-103.DOI: 10.19491/j.issn.1001-9278.2018.03.016

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Elastic Hysteric Effect and Constitutive Model of PTFE, PA66 and Polyester-type TPU Under Rolling Contact

  

  • Received:2017-08-15 Revised:2017-11-03 Online:2018-03-26 Published:2018-04-26

Abstract: The rolling friction coefficient was theoretically deduced from the elastic hysteric effect according to the standard linear solid model. The static creep and relaxation characteristics of PTFE, PA66 and polyester-type TPU(PEUR) was evaluated by a CETR UMT-2 type equipment and an LKDM-2000 tester, and their rolling friction behavior under different loads and velocities was investigated by a rolling friction testing equipment. The coupling relationship between the viscoelasticity and rolling friction coefficient was discussed through a comparison between experimentals data and theoretical results. The results indicated that the rolling friction coefficient of the three polymers increased with an increase of the rolling velocities. The ratio of rolling friction coefficient for PEUR, PA66 and PTFE was 1.12∶1.02∶1 under the same experimental condition. The theoretical data of the rolling friction coefficient were consistent with the experimental results, indicating that the friction resistance force was mainly originated from the elastic hysteresis effect.