实时高温下与热处理后砂岩动态拉伸特性研究

来源 :工程爆破 | 被引量 : 0次 | 上传用户：lingyuehqu2009

【摘要】

：

为了开展实时高温下及加热冷却后岩石动态力学性质的对比研究,利用自行设计的加热装置结合SHPB系统对两种温度状态砂岩的动态拉伸特性进行试验研究,处理温度为常温(25℃)～600℃共7组.结果表明:砂岩的率效应在两种温度状态下都存在,热处理后的砂岩拉伸强度除100℃外都比常温状态小,且随着热处理温度的增大,拉伸强度减小,温度会影响试样的破坏形态.高温下砂岩的拉伸强度除600℃外都比常温状态大,且拉伸强度随着温度的升高先增大后减小,加载率对破坏模式起主导作用.高温下的热膨胀作用会抑制裂纹相互连接,使得岩石结构更

【作者】

：

王超尹土兵

【机构】

：

中南大学资源与安全工程学院,长沙 410083;中南大学资源与安全工程学院,长沙 410083;中南大学深部金属矿产开发与灾害控制湖南省重点实验室,长沙 410083

【出处】

：

工程爆破

【发表日期】

：

2021年6期

【关键词】

：

砂岩高温 SHPB 拉伸强度破坏模式

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实时高温下与热处理后砂岩动态拉伸特性研究

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