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SHPB实验过程中岩石变形破坏的实时物像同步分析
A Physical Image Synchronization Analysis System for Rock Dynamic Test
投稿时间: 2016-10-12  最后修改时间: 2016-12-02
DOI:
中文关键词:  物像同步  岩石  SHPB  应力-应变关系  动态力学性能
英文关键词:a physical image synchronization analysis system  rock  SHPB  relationship of stress and strain  dynamic mechanical property
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
万璋 浙江大学 wanzhangfox@163.com 
范立峰 北京工业大学 fanlifeng@bjut.edu.cn 
巩荣耀 中铁十二局集团第二工程有限公司  
王林 中铁十二局集团第二工程有限公司  
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中文摘要:
      典型的岩石动态压缩应力-应变曲线有不同的阶段,岩石变形、破坏形态也有不同的图像表征,力学响应和图像表征具有一一对应关系。针对上述特性:组合分离式霍普金森压杆(SHPB)与高速摄像机,建立物象同步分析装置,系统研究了岩石在冲击荷载下完整的应力和应变动态响应,并实时采集图像信号。最终,根据应力波传播理论,编制了物象同步分析程序,通过界面显示可实现力学响应与图像表征同步分析。直观地反映了岩石在冲击荷载作用下,应力-应变曲线中不同阶段的物理力学特性及与其对应的试样开裂情况、破坏趋势、损伤程度等图像表征,清晰地揭示了岩石变形破坏过程的力学机理。
英文摘要:
      A typical dynamic compressive stress-strain curve of rock has different stages. Moreover, the form of deformation and fracture of rock has different image presentations. There is a one-to-one relationship between mechanical response and image presentations. A physical image synchronization analysis system composed of the Split Hopkinson Pressure Bar(SHPB) and a high speed camera was set up to investigate the relationship. SHPB recorded the response of strain and stress under impact load while high speed camera captured dynamic images information. Based on the theory of stress wave propagation, a program is developed to establish a physical image synchronization analysis system. The results directly reflect the relationship between mechanical properties and the corresponding images information in different stages of the stress-strain curve under impact load. It also demonstrates the mechanical mechanism of deformation and fracture of the rock.
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