Spallation of polycarbonate on nanosecond timescales.

IF 2.2 3区 物理与天体物理 Q2 PHYSICS, FLUIDS & PLASMAS
Jacob M Diamond, K T Ramesh
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引用次数: 0

Abstract

Polycarbonate is commonly used in extreme environments, particularly in applications involving high-velocity impact. A critical failure mode in high-velocity impact is that of spallation, where intersecting release waves result in the dynamic fracture of the material under high-rate tension. Despite the ubiquity of polycarbonate, major gaps exist in our understanding of its behavior at high rates over very short timescales. Here we investigate the spallation of polycarbonate on nanosecond timescales at strain rates of ∼10^{6}s^{-1} through a data set of 117 spall experiments. The size and fidelity of our dataset allow us to calculate fundamental uncertainties associated with the spallation of polycarbonate. Compared to lower rate experiments, we observe higher spall strengths, a higher spall initiation threshold, and a more gradual decrease in spall strength with increasing prior shock stress. This paper provides a strong basis for future computational model development and brings up questions on the underlying mechanisms that control spallation in polymers at extreme strain rates.

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来源期刊
Physical Review E
Physical Review E PHYSICS, FLUIDS & PLASMASPHYSICS, MATHEMAT-PHYSICS, MATHEMATICAL
CiteScore
4.50
自引率
16.70%
发文量
2110
期刊介绍: Physical Review E (PRE), broad and interdisciplinary in scope, focuses on collective phenomena of many-body systems, with statistical physics and nonlinear dynamics as the central themes of the journal. Physical Review E publishes recent developments in biological and soft matter physics including granular materials, colloids, complex fluids, liquid crystals, and polymers. The journal covers fluid dynamics and plasma physics and includes sections on computational and interdisciplinary physics, for example, complex networks.
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