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Design and application of a comprehensive experimental system for real imaging-virtual imaging of dynamic caustics

机译:综合实验系统的设计与应用动态焦化 - 虚拟成像

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摘要

On the basis of the principle of caustics, a comprehensive experimental system for real imaging-virtual imaging was designed and established and then applied to dynamic fracture mechanics experiments. An explosion load experimental system was used to investigate the interaction between blast stress waves and prefabricated cracks. The virtual image information of the caustic spot of the crack tip under the radial compressive stress of the explosive load was captured and quantified. Combined with the experimental data obtained by the real imaging system, the entire interaction process of the blast stress wave and prefabricated cracks was quantitatively characterized. The impact load test system was used to carry out three-point bending impact testing on a unilateral offset crack specimen. In the experiment, the load applied to the upper boundary and the stress intensity factor of the crack tip were simultaneously obtained. The comprehensive experimental system had a simple light path and could simultaneously obtain two sets of experimental information for the real and virtual images, respectively. Thereby, abundant and reliable data were obtained for experimental research. In summary, the experimental systems were effectively used in the investigation of impact and explosion dynamics. (C) 2021 Optical Society of America.
机译:根据焦散线原理,设计并建立了一套完整的真实成像虚拟成像实验系统,并将其应用于动态断裂力学实验。利用爆炸载荷实验系统研究了爆炸应力波与预制裂纹的相互作用。对爆炸载荷径向压应力作用下裂纹尖端焦散斑的虚拟图像信息进行了采集和量化。结合实际成像系统获得的实验数据,定量描述了爆炸应力波与预制裂纹相互作用的整个过程。冲击载荷试验系统用于对单侧偏置裂纹试样进行三点弯曲冲击试验。在实验中,同时获得了施加在上边界上的载荷和裂纹尖端的应力强度因子。该综合实验系统光路简单,可同时获得真实图像和虚拟图像的两组实验信息。从而为实验研究提供了丰富可靠的数据。总之,这些实验系统被有效地用于撞击和爆炸动力学的研究。(2021)美国光学学会。

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  • 来源
    《Applied optics》 |2021年第13期|共10页
  • 作者单位

    Univ Sci &

    Technol Beijing Sch Civil &

    Resource Engn Beijing 100083 Peoples R China;

    Univ Sci &

    Technol Beijing Sch Civil &

    Resource Engn Beijing 100083 Peoples R China;

    Univ Sci &

    Technol Beijing Sch Civil &

    Resource Engn Beijing 100083 Peoples R China;

    Univ Sci &

    Technol Beijing Sch Civil &

    Resource Engn Beijing 100083 Peoples R China;

    Univ Sci &

    Technol Beijing Sch Civil &

    Resource Engn Beijing 100083 Peoples R China;

    Univ Sci &

    Technol Beijing Sch Civil &

    Resource Engn Beijing 100083 Peoples R China;

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  • 正文语种 eng
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