Experimental study of the association between sandstone size effect and strain rate effect

Kao Siming; Zhao Guangming; Xu Wensong; Cheng Xiang; Dong Chunliang; Zhang Ruofei

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Experimental study of the association between sandstone size effect and strain rate effect

机译：砂岩尺寸效应与应变率效应的关系实验研究

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The association between sandstone size effect and strain rate effect were investigated experimentally with a split Hopkinson pressure bar (SHPB) system. The sandstone samples with phi 50 mm and different lengths were loaded under the constant ratio of punch velocity to sample length to study their size effects. Sandstone samples with constant length of 25 mm were taken as the reference to study their strain rate effects. Results indicate that, under the same velocity of the punch, strain rate of each sandstone sample is inversely proportional sample length; dynamic strength of sandstone increases with the strain rate and the length to diameter ratio (L/D), and presents a quadratic curvilinear relation with strain rate while presenting a cubic curvilinear relation with sample L/D; the reasonable L/D of $50 mm sandstone samples ranges from 0.5 to 0.8; that dissipated energy can present a fixed proportional relation with punch kinetic energy is unrelated to sample length.

机译：用分裂的Hopkinson压力棒（SHPB）系统实验研究了砂岩尺寸效应和应变率效应之间的关联。砂岩样品具有PHI 50mm和不同长度的冲压速度的恒定比例，以研究其尺寸效应。砂岩样品恒定长度为25mm，作为研究其应变率效应的参考。结果表明，在相同的冲头速度下，每个砂岩样品的应变率是成反比的样品长度; 砂岩的动态强度随着应变速率和直径比（L / D）的长度而增加，并呈现与应变率的二次曲线关系，同时呈现与样品L / D的立方曲线关系; 50 mm的合理的L / D砂岩样品的范围为0.5至0.8; 耗散能量可以呈现与冲头动能的固定比例关系与样本长度无关。

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《Journal of Mechanical Science and Technology》 |2020年第9期|共12页
作者
Kao Siming; Zhao Guangming; Xu Wensong; Cheng Xiang; Dong Chunliang; Zhang Ruofei;
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作者单位

Anhui Univ Sci &

Technol State Key Lab Min Response &

Disaster Prevent &

C Huainan 232001 Peoples R China;

Anhui Univ Sci &

Technol State Key Lab Min Response &

Disaster Prevent &

C Huainan 232001 Peoples R China;

Anhui Univ Sci &

Technol State Key Lab Min Response &

Disaster Prevent &

C Huainan 232001 Peoples R China;

Anhui Univ Sci &

Technol State Key Lab Min Response &

Disaster Prevent &

C Huainan 232001 Peoples R China;

Anhui Univ Sci &

Technol State Key Lab Min Response &

Disaster Prevent &

C Huainan 232001 Peoples R China;

Anhui Univ Sci &

Technol State Key Lab Min Response &

Disaster Prevent &

C Huainan 232001 Peoples R China;

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正文语种 eng
中图分类机械学（机械设计基础理论）;
关键词
Strain rate effect; Size effect; Sandstone; Split Hopkinson pressure bar (SHPB);

机译：应变率效应;尺寸效果;砂岩;分裂霍普金森压力棒（SHPB）;

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专利

1. Experimental study of the association between sandstone size effect and strain rate effect [J] . Kao Siming, Zhao Guangming, Xu Wensong, Journal of Mechanical Science and Technology . 2020,第9期

机译：砂岩尺寸效应与应变率效应的关系实验研究
2. Experimental investigation on fracture behaviors and acoustic emission characteristics of sandstone under different strain rates [J] . Zhao Zhenlong, Jing Hongwen, Shi Xinshuai, Environmental earth sciences . 2021,第3期

机译：不同应变率下砂岩断裂行为和声发射特性的实验研究
3. Experimental Investigation on Strength and Deformation Characteristics of Red Sandstone at Strain Rates of 10?2～55?s?1 [J] . Jie Shi, Zongmu Luo, Huachao Liu, Advances in civil engineering . 2020,第1期

机译：Red砂岩强度和变形特性的实验研究10？2〜55？S？1
4. Experimental study on the Crack Initial Stress and the Crack Damage Stress of Red Sandstone Under Different Strain Rate Conditions [C] . Canshou Chen, Pengxian Fan, Wenpei Li International Conference on Advanced Engineering Materials and Technology . 2011

机译：不同应变率条件下红砂岩裂纹初始应力和裂纹损伤应力的实验研究
5. Flow Stress, Strain Hardening Rate, and Dislocation Avalanches: Size and Strain Rate Dependence in Nano- and Micro-Scaled Single Crystal Tungsten [D] . Jiang, Katherine. 2019

机译：流量应力，应变硬化率和位错雪崩：纳米和微鳞型单晶钨中的尺寸和应变率依赖性
6. Experimental Study on Mechanical Characteristics and Fracture Patterns of Unfrozen/Freezing Saturated Coal and Sandstone [O] . Chong Wang, Shuangyang Li, Tongwei Zhang, 2019

机译：未冻结/冻结饱和煤和砂岩的力学特性和断裂模式的实验研究
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Experimental study of the association between sandstone size effect and strain rate effect

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