[1]徐小丽,高 峰,钟卫平,等.温度作用下花岗岩力学性质实验研究[J].西安科技大学学报,2008,(04):651-656.
 XU Xiao-li,GAO Feng,ZHONG Wei-ping,et al.Experimental research on mechanical characteristics of granite under temperature loads[J].Journal of Xi'an University of Science and Technology,2008,(04):651-656.
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温度作用下花岗岩力学性质实验研究()
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2008年04期
页码:
651-656
栏目:
出版日期:
2008-12-31

文章信息/Info

Title:
Experimental research on mechanical characteristics of granite under temperature loads
文章编号:
1672-9315(2008)04-0651-06
作者:
徐小丽12高 峰2钟卫平2王美芬3
1.南通大学 建筑工程学院,江苏 南通 226019; 2.中国矿业大学 理学院,江苏 徐州 221008; 3.燕山大学 建筑工程与力学学院,河北 秦皇岛 066004
Author(s):
XU Xiao-li12 GAO Feng2ZHONG Wei-ping2 WANG Mei-fen3
TSchool of Architecture and Civil Engineering, Nantong University, Nantong 226019,China; 2.School of Sciences, China University of Mining and Technology, Xuzhou 221008, China; 3. School of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao 066004,China
关键词:
花岗岩 温度载荷 应力应变曲线 声发射 脆塑性转换
Keywords:
granite temperature load stress-strain curve acoustic emission(AE) brittle-ductile transition
分类号:
TD315
文献标志码:
A
摘要:
对实时高温作用下(常温~850 ℃)和高温作用冷却后(常温~1 300 ℃)花岗岩试件单轴受压破坏全过程进行了试验研究,得到了实时高温作用下花岗岩的全应力-应变曲线、高温作用冷却后岩石破坏全过程的力学特征和声发射特征。试验结果表明:实时高温作用下,花岗岩强度等力学性质连续劣化; 高温作用冷却后,花岗岩在200 ℃~600 ℃的温度区间内出现了一个随温度升高强度不降反增的异常现象,在850 ℃之后,岩样强度降低,呈现出较明显的塑性特征,花岗岩结构发生脆塑性转变的相变行为; 岩样承受900 ℃以上高温作用后,
Abstract:
Experiments on granite under uniaxial compression at high temperature(normal~850 ℃)and after high temperature(normal~1 300 ℃)have been researched. The stress-strain behaviors at high temperature and mechanical characteristics, acoustic emission(AE)characteristics after high temperature have been obtained. The results show that at high temperature peak strength decreases continuously. But after high temperature, there is an excrescent phenomenon that strength increases with the rising of temperature from 200 ℃ to 600 ℃.The strength decreases suddenly and the granite presents plastic behavior after 850 ℃, which indicates phase change behavior of brittle-ductile transition has appeared around 850℃. After 900 ℃, the granite presents plastic behavior, AE strength decreases, the duration increases and the residual plastic deformation of granite still releases serried acoustic emission especially after peak strength. The time that AE counts appear obviously has been postponed with the increase of temperature.

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备注/Memo

备注/Memo:
基金项目: 973国家重点基础研究发展规划项目(2002CB412705,2002CB412707); 国家创新群体项目(50221402); 国家自然科学基金项目(50579042) 作者简介:徐小丽(1981-),女,江苏如皋人,博士,主要从事岩石热力学、热损伤研究.
更新日期/Last Update: 2008-12-31