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.
Highlights
Nowadays, elastomers, a kind of soft, lightweight, and flexible polymer, have become one of the most frequently applied materials in dynamic events, due to their outstanding impact-resistant performance, such as large deformation, high shock absorption, low wave impedance, etc. [1,2].In addition to the high specific strength, they can play a key role in reducing the weight of the constructed protective structures while not abating the capability to resist impact loading or shock explosion, which will notably enhance the mobility of equipment and improve the safety and security.Elastomer, with a material state between rubber and plastics, can be prepared and processed as a plastic and has rubber-like mechanical performance [3]
With a material state between rubber and plastics, can be prepared and processed as a plastic and has rubber-like mechanical performance [3]. They are viscoelastic/hyperelastic, responding to static loading and becoming stiff when subjected to an impact loading, which reflects the phenomena of high strain rate dependency [4,5,6]
Dynamic compressive tests were conducted on the developed polyurethane elastomer (PUE) material via an aluminum
Summary
Elastomers, a kind of soft, lightweight, and flexible polymer, have become one of the most frequently applied materials in dynamic events, due to their outstanding impact-resistant performance, such as large deformation, high shock absorption, low wave impedance, etc. With a material state between rubber and plastics, can be prepared and processed as a plastic and has rubber-like mechanical performance [3]. They are viscoelastic/hyperelastic, responding to static loading and becoming stiff when subjected to an impact loading, which reflects the phenomena of high strain rate dependency [4,5,6]. The nature of interaction between the soft segments and hard segments
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