Prediction of Fatigue Life of Polyetherimide/Carbon Fiber Particulate Composites at Various Maximum Stresses and Filler Contents
Alexey A. Bogdanov, Sergey V. Panin
TL;DR
This paper predicts how well polyetherimide composites with carbon fibers resist fatigue under different stresses and filler amounts.
Contribution
The study introduces a new model linking composite structure, filler content, and fatigue life for design purposes.
Findings
A modified fatigue model was developed using experimental data and the Basquin equation.
An algorithm was proposed to design composites based on fatigue life criteria.
The model accounts for both maximum stress and carbon fiber content effects.
Abstract
The objective of this research was to predict the fatigue behavior of polyetherimide-based composites loaded with short carbon fibers 200 μm long under cyclic loads. The weight fraction of the filler was 10, 20, and 30 wt.%, while the maximum stress in a cycle was 55, 65, and 75 MPa. A modified fatigue model based on the obtained experimental results and Basquin equation was developed. The novelty of the results is related to developing a model on the structure–property relationship, which accounts for both the maximum stress in a cycle and the carbon fiber content in the composites. In addition, an “algorithm” for designing such composites according to the fatigue life criterion was proposed. The approach to determine relationships between the composition, structure, and properties of PCMs described in this study can be applied to further expand the model and to improve its versatility…
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Taxonomy
TopicsTribology and Wear Analysis · Synthesis and properties of polymers · Fiber-reinforced polymer composites