Усталостная долговечность антифрикционного композита на основе полиимида, армированного углеродными волокнами

Abstract

The paper presents the results of fatigue tests of a solid lubricant antifrictional composite with 10% PTFE and 10% annealed carbon fibers in a PI matrix at various levels of strain. At the same level of stress, the compound “PI + 10 wt. % PTFE + 10 wt. % MCF" demonstrates a greater number of cycles to failure and deforms to a lesser value. It was found that the increase in fatigue life is greater in low cycle fatigue, when plastic deformation occurs in materials. The increase in fatigue life of the composite is therefore caused by the increase in yield stress.