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首页> 外文期刊>The Open Civil Engineering Journal >Determination of Damage Constitutive Behavior for Rock Salt Under Uniaxial Compression Condition with Acoustic Emission
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Determination of Damage Constitutive Behavior for Rock Salt Under Uniaxial Compression Condition with Acoustic Emission

机译：声发射单轴压缩条件下岩盐损伤本构行为的确定

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摘要

The mechanical characteristics of rock salt have an important influence on the safety of the salt cavity. The acoustic emission (AE) technique was used to analyze the generation of microcracks in rock salt under uniaxial compression condition. By monitoring acoustic emission in whole process of stress - strain curve under uniaxial compression test, the damage characteristic of rock salt is obtained. The AE rate-strain curve is able to reflect the damage development process with better consistency evident with the cracks generating. The failure form of rock salt is mainly the shear failure under condition of low loading strain rate. After shear failure, a lot of small crushed particles spread on the surface of the failure surface. A damage constitutive model of rock salt is determined on the basis of acoustic emission characteristics, which could reflect the strength and deformation characteristics before the peak strength.
机译：岩盐的机械特性对盐腔的安全性有重要影响。声发射（AE）技术用于分析单轴压缩条件下岩盐中微裂纹的产生。通过在单轴压缩试验中监测应力-应变曲线的整个过程中的声发射，可以获得岩盐的破坏特性。 AE速率-应变曲线能够更好地反映裂纹的产生，从而反映出损伤的发展过程。岩盐的破坏形式主要是低应变速率条件下的剪切破坏。剪切破坏后，许多小碎粒散布在破坏表面的表面。根据声发射特性确定了岩盐的损伤本构模型，可以反映出强度和变形特性在峰值强度之前。

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