高温作用下和加热冷却后花岗岩力学性能的比较（英文）

发布时间：2018-01-10 18:21

本文关键词：高温作用下和加热冷却后花岗岩力学性能的比较（英文）　出处：《Transactions of Nonferrous Metals Society of China》2016年07期 　论文类型：期刊论文

【摘要】：运用带有加热装置的电液伺服材料试验机对热处理后和高温下的花岗岩进行了静态力学实验。分析了两种状态下花岗岩的应力-应变曲线及峰值强度、峰值应变和弹性模量随温度的变化规律,并且探讨了两种状态下岩石的破坏形态。结果显示,与热处理后的花岗岩相比,高温下花岗岩脆-延转变的临界温度更低,压密阶段更长,弹性模量更小且损伤更大。此外,与热处理后的花岗岩相比较,高温下花岗岩的峰值应力更小,然而峰值应变却更大,且两者都随着温度的升高变化更加显著。另外,高温处理后和高温下花岗岩的破坏形态明显不同。低于100°C时,两种状态下花岗岩的破坏形态相同,皆表现为劈裂破坏。然而,高于100°C后,热处理后和高温下花岗岩的破坏形态分别表现为劈裂破坏和剪切破坏。
[Abstract]:The static mechanical experiments of granite after heat treatment and at high temperature were carried out by using an electro-hydraulic servo material testing machine with heating device. The stress-strain curves and peak strength of granite in two states were analyzed. The variation of peak strain and elastic modulus with temperature, and the failure patterns of rock under two different states are discussed. The results show that the peak strain and modulus of elasticity are compared with those of the granite after heat treatment. At high temperature, the critical temperature of brittle ductility transition is lower, the compaction stage is longer, the elastic modulus is smaller and the damage is greater. In addition, compared with the granite after heat treatment, the peak stress of granite at high temperature is smaller. However, the peak strain is larger, and both of them change more significantly with the increase of temperature. In addition, the failure patterns of granite after high temperature treatment are obviously different from those at high temperature. The failure patterns of granite in both states are the same, both of which are cleavage failure. However, after heat treatment and at high temperature, the failure patterns of granite are split failure and shear failure, respectively.
【作者单位】：中南大学资源与安全工程学院;
【基金】：Projects(51304241,11472311,51322403)supported by the National Natural Science Foundation of China Project(2015CX005)supported by Innovation Driven Plan of Central South University,China Project(2016zzts456)supported by Independent Exploration and Innovation Foundation of Central South University,China Project(2015CB060200)supported by the National Basic Research Program of China
【分类号】：TU45
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