Experimental studies on the effect of cyclic thermal shock and cooling methods on the mechanical properties and fracture behavior of prefabricated fissured sandstone

热冲击 材料科学 多物理 热膨胀 热的 断裂(地质) 岩土工程 压缩(物理) 复合材料 地质学 热力学 有限元法 物理
作者
Man Li,Xianshan Liu,Yuhua Pan,Shihao Qiao,Zelin Hou,Ziyu Hao
出处
期刊:Theoretical and Applied Fracture Mechanics [Elsevier BV]
卷期号:122: 103576-103576 被引量:14
标识
DOI:10.1016/j.tafmec.2022.103576
摘要

The construction of sandstone thermal storage systems and the evaluation of their long-term stability are of great significance to the development of geothermal energy. In this study, the effect of the number of thermal shocks and cooling methods on the mechanical properties and fracture behavior of sandstone containing a single prefabricated fissure was investigated. The experimental results show that as the number of thermal shocks increases, the peak stress and elastic modulus of the fissured sandstone gradually decrease, and show a very good exponential functional relationship. The first thermal shock weakens the mechanical properties of fissured sandstone most severely, and the deterioration effect of mechanical properties is significantly slowed down when the number of thermal shocks exceeds 4. In addition, compared with water cooling, the reduction of the mechanical properties of fissured sandstone by air cooling is lower. As the cooling water temperature decreases, the thermal shock effect of the fissured sandstone is more severe, resulting in more significant damage. An empirical formula considering the number of thermal shocks and cooling water temperature is proposed to characterize the damage to the fissured sandstone. The crack initiation of fissured sandstone under uniaxial compression subjected to different thermal shocks is dominated by tensile failure (wing crack). As the number of thermal shocks increases and the cooling water temperature decreases, the initial crack modes gradually change from T1 to T2, or a more complex pattern. Subsequently, the thermal shock process of fissured sandstone is simulated in COMSOL Multiphysics. The effect of heat transfer coefficient and cooling water temperature on the temperature field and stress field in fissured sandstone are discussed, and the reasons for the thermal cracking of the fissured sandstone under thermal shock are revealed.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
twinkle完成签到,获得积分10
刚刚
多情的裘完成签到 ,获得积分10
1秒前
阿双关注了科研通微信公众号
1秒前
1秒前
2秒前
3秒前
3秒前
完美世界应助王露阳采纳,获得10
3秒前
Hello应助Shellbeaze采纳,获得10
3秒前
hyy完成签到,获得积分10
4秒前
庞鲂应助随遇而安采纳,获得50
6秒前
酷波er应助墨客采纳,获得10
6秒前
6秒前
6秒前
6秒前
潘嫄发布了新的文献求助10
7秒前
7秒前
7秒前
YW发布了新的文献求助10
8秒前
Yelicious发布了新的文献求助10
8秒前
wxy发布了新的文献求助10
8秒前
开心的松思完成签到,获得积分10
8秒前
fj发布了新的文献求助10
9秒前
11秒前
悦耳冰蓝完成签到,获得积分10
11秒前
英俊的铭应助费凝海采纳,获得10
12秒前
12秒前
韩立完成签到,获得积分10
12秒前
淇淇发布了新的文献求助10
13秒前
14秒前
科研通AI2S应助xs采纳,获得10
15秒前
15秒前
研友_VZG7GZ应助Yoo采纳,获得30
15秒前
16秒前
exing完成签到,获得积分10
16秒前
BINGBING发布了新的文献求助10
17秒前
18秒前
思源应助落后的采波采纳,获得10
18秒前
18秒前
Tian_lanlan完成签到,获得积分10
19秒前
高分求助中
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
Effective Learning and Mental Wellbeing 300
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3975165
求助须知:如何正确求助?哪些是违规求助? 3519595
关于积分的说明 11198781
捐赠科研通 3255912
什么是DOI,文献DOI怎么找? 1798001
邀请新用户注册赠送积分活动 877343
科研通“疑难数据库(出版商)”最低求助积分说明 806298