高动压下剪切对钠钙玻璃强度和损伤演化的影响

IF 2.6 4区 工程技术 Q2 MECHANICS
Vatsa Gandhi, B. Lawlor, C. Kettenbeil, G. Ravichandran
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引用次数: 0

摘要

硅玻璃,如钠钙玻璃(SLG),由于其优异的光学性能、高强度和相对较低的成本,在工程中得到了广泛的应用。在这样的应用中,由于高速/超高速冲击,SLG可能会受到强烈的动态载荷,因此需要了解动态剪切强度和动力学,以开发本构模型。然而,尽管几项研究已经为硅酸盐玻璃产生了Hugoniot,但似乎没有一项研究在压力高于~20GPa的情况下测量到剪切阻力。本研究采用夹层结构高压剪切板冲击(HP-PSPI)实验,探讨了压力和应变速率对钠钙玻璃抗剪性能的影响。这些实验是在14 − 42GPa和105的应变速率 − 106 s−1,并使用结合改良Johnson Holmquist(JH-2)材料模型的有限元模拟进行分析。观察到SLG的屈服强度随压力而降低,这让人想起高压下颗粒介质中剪切强度的演变。这一观察结果表明,在高压下,SLG中可能存在从完整材料到颗粒物质的剪切诱导损伤过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Role of shear on strength and damage evolution in soda-lime glass under high dynamic pressures
Silica glasses, such as soda-lime glass (SLG), have found wide ranging applications in engineering due to their excellent optical properties, high strength, and relatively low cost. In such applications, SLG may be subjected to intense dynamic loading due to high/hyper-velocity impact and therefore necessitates understanding of the dynamic shear strength and kinetics for the development of constitutive models. However, while several investigations have generated Hugoniots for silicate glasses, none appear to have measured shearing resistance at pressures above ∼20 GPa. In this study, the role of pressure and strain rate on the shearing resistance of soda-lime glass is explored using sandwich configuration high pressure-pressure shear plate impact (HP-PSPI) experiments. These experiments are conducted at pressures ranging from 14 − 42 GPa and strain rates of 105 − 106 s−1, and analyzed using finite element simulations incorporating a modified Johnson-Holmquist (JH-2) material model. The yield strength of SLG is observed to decrease as a function of pressure, which is reminiscent of the evolution of shear strength in granular media at high pressures. This observation suggests a probable shear-induced damage progression from intact material to granular matter in SLG at high pressures.
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来源期刊
CiteScore
4.80
自引率
3.80%
发文量
95
审稿时长
5.8 months
期刊介绍: All areas of theoretical and applied mechanics including, but not limited to: Aerodynamics; Aeroelasticity; Biomechanics; Boundary layers; Composite materials; Computational mechanics; Constitutive modeling of materials; Dynamics; Elasticity; Experimental mechanics; Flow and fracture; Heat transport in fluid flows; Hydraulics; Impact; Internal flow; Mechanical properties of materials; Mechanics of shocks; Micromechanics; Nanomechanics; Plasticity; Stress analysis; Structures; Thermodynamics of materials and in flowing fluids; Thermo-mechanics; Turbulence; Vibration; Wave propagation
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