1. Studying a Flexible Polyurethane Elastomer with Improved Impact-Resistant Performance.
- Author
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Fan, Jitang and Chen, Ang
- Subjects
- *
POLYURETHANE elastomers , *STRESS-strain curves , *DEAD loads (Mechanics) , *STRAIN energy , *MICROCRACKS , *STRAIN rate - Abstract
A flexible polyurethane elastomer (PUE) is studied, and the improved impact-resistant performance is revealed. Compressive stress–strain curves over a wide loading rate range were derived. Under static loading, the rubbery-like characteristics are demonstrated, which are flexible and hyperelastic, to process a large strain of about 60% followed by full recovery upon unloading. Under high-rate loadingcompared with the mechanical data of polyurethane elastomer (PUE) and polyurea (PUA) materials in the literature. Orderly parallel deformation bands were formed from carrying a large strain. The fibrils were found between deformation bands for enhancing the yield/plateau stress. A considerable plastic zone ahead of propagating crack with numerous crazes and microcracks was produced for realizing the dynamic strain energy absorption. This work presents a scientific innovation for developing outstanding impact-resistant polyurethane elastomers for transparent protection engineering. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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