恒阻大变形锚杆冲击拉伸实验及其有限元分析

doi:10.13722/j.cnki.jrme.2015.0871

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摘要为了研究在动态冲击作用下恒阻大变形锚杆的力学特性，采用自主研发的恒阻大变形锚杆霍普金森拉杆动力冲击拉伸实验系统，对某批次恒阻大变形锚杆进行动态冲击拉伸实验，从支护阻力、锚杆伸长量和膨胀量等方面对锚杆的动态力学性能进行分析，并验证该锚杆的负泊松比效应。并通过有限元分析的方法与实验结果进行比较，验证有限元结果的准确性。实验结果表明，该锚杆通过产生弹塑性结构变形来吸收冲击能量并具有独一无二的负泊松比效应，因而能良好地适应动态冲击。有限元分析结果与实验结果吻合度较高，不仅体现了有限元分析方法的准确性，也表明今后可以运用有限元分析来佐证或替代部分室内实验的方法。

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关键词 ：岩石力学, 恒阻大变形, 冲击拉伸实验, 动态力学性能, 负泊松比效应, 有限元分析

Abstract：The elongation and impacting experimental system was used to study the dynamic mechanical properties of the constant resistance and large deformation(CRLD) bolts，such as the impacting force，the expansion and elongation of one type of CRLDs. The negative Poisson?s ratio effect was verified and the experimental results were compared with the ones from finite element analysis(FEA). The experimental results showed that the bolt absorbed the impact energy through a process of elastic-plastic structural deformation with the unique negative Poisson?s ratio effect and was well adapted to the dynamic impacting process. The FEA results were matched with the experiment ones，which not only confirmed the accuracy of the FEA method，but also verified the feasibility of using FEA method to prove or substitute the experiment.

Key words： rock mechanics constant resistance and large deformation(CRLD) elongation and impacting experiment dynamic mechanical properties negative Poisson?s ratio effect finite element analysis(FEA)

引用本文:

何满潮1，李晨1，2，宫伟力1，2. 恒阻大变形锚杆冲击拉伸实验及其有限元分析[J]. 岩石力学与工程学报, 2015, 34(11): 2179-2187.
HE Manchao1，LI Chen1，2，GONG Weili1，2. ELONGATION AND IMPACTING EXPERIMENTAL SYSTEM FOR BOLTS WITH CONSTANT RESISTANCE AND LARGE DEFORMATION AND FINITE ELEMENT ANALYSIS. , 2015, 34(11): 2179-2187.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2015.0871 或 http://www.rockmech.org/CN/Y2015/V34/I11/2179

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