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The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry
Published on: August 25, 2016
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Characterization and Quantitative Analysis of Crack Precursor Size for Rubber Composites
Hao Guo1, Fanzhu Li2,3, Shipeng Wen4
1State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China. 2017200538@mail.buct.edu.cn.
Materials (Basel, Switzerland)
|October 24, 2019
Summary
Understanding rubber fatigue failure is crucial for durable composites. This study characterized crack precursor sizes using multiple methods, revealing sizes from 180 μm to 500 μm and average sizes around 3.3-3.6 μm.
Area of Science:
- Engineering
- Materials Science
- Polymer Science
Background:
- Material fatigue failure causes significant economic losses annually.
- Understanding rubber fatigue failure is key to developing durable rubber composites.
- Crack precursor size is vital for mechanical and fatigue properties of rubber composites.
Purpose of the Study:
- To analyze the size and distribution of crack precursors in rubber composites.
- To provide theoretical guidance for improving the fatigue performance of rubber composites.
Main Methods:
- Uniaxial tensile and tear tests combined with fracture mechanics.
- Uniaxial fatigue and fatigue crack growth rate tests using the Thomas model.
- Scanning electron microscopy (SEM) analysis.
Main Results:
- Crack precursor sizes deduced from 180 μm to 500 μm via fracture mechanics.
- Average crack precursor size calculated as 3.3 μm using the Thomas fatigue crack growth model.
- Average crack precursor size determined as 3.6 μm by SEM.
Conclusions:
- Systematic presentation of crack precursor size and distribution in rubber composites.
- Theoretical and experimental validation of crack precursor characterization.
- Findings offer guidance for enhancing rubber composite fatigue performance.
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