Abstract
The relaxation properties and fracture of glycerol, silicone oil, transformer oil, and water have been studied experimentally under shock wave loading. The power-law strain rate dependences of the stress amplitude and spall strength were found for the compression and rarefaction fronts, respectively. It was shown that temperature has a strong influence on the spall strength of glycerol near the phase transformation temperature. The power laws reflect a self-similar nature of the momentum transfer and fracture mechanisms of liquids that are conventionally observed in solids and governed by the mechanisms of defect-induced structural relaxation. The mechanisms of viscoelasticity are related to the metastable states that may give rise to a collective behavior of displacement field fluctuations (microshearing) in liquids and thus provide a viscoplastic response of liquids under high strain rate loading.
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