A SHPB experimental study and microscomic analysis of freeze-thaw red sandstone

被引：0

作者：

Liu S. ^{[1
]}

Xu J. ^{[1
,2
]}

Wang P. ^{[1
]}

Liu S. ^{[1
]}

机构：

[1] Department of Airfield and Building Engineering, Air Force Engineering University, Xi'an

[2] College of Mechanics and Civil Architecture, Northwest Polytechnic University, Xi'an

来源：

Xu, Jinyu | 1600年 / Chinese Vibration Engineering Society卷 / 36期

关键词：

Freeze-thaw cycle; Impact mechanical behaviors; Scanning electron microscopy; Split Hopkinson pressure bar;

D O I：

10.13465/j.cnki.jvs.2017.20.031

中图分类号：

学科分类号：

摘要：

A 100 mm diameter split Hopkinson pressure bar (SHPB) was used to perform impact testing on red sandstone specimen of different freeze-thaw cycles in the work. The dynamic properties of red sandstone, including stress-strain curves and variations of peak stress, peak strain and elastic modulus, were studied. The effects of red sandstone caused by freeze-thaw cycles were tested by an ultrasonic detector and a scanning electron microscopy. The results show that with the increase of the number of freeze-thaw cycles, peak stress reduces, and peak stress presents strain rate effect significantly. Peak stress relative loss ξ was used to normalize specimen under different strain rates. ξ is approximately linear with the freeze-thaw cycles. With increasing number of freeze-thaw cycles, peak strain gradually increases, and elastic modulus of specimens decreases. Scanning freeze-thaw cycle's specimens using scanning electron microscopy shows that, after freeze-thaw the cementation material of specimens of red sandstone falls off largely, and the coupling between the particles decreases. Quantitative analysis shows that the increase of porosity area and reduce of strength of red sandstone have obvious correlation. © 2017, Editorial Office of Journal of Vibration and Shock. All right reserved.

引用

页码：203 / 209

页数：6

共 12 条

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