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    Volume 47, Issue 6 (November 2019)

    Special Issue Paper

    Monitoring of Particle Crushing under One-Dimensional Loading

    (Received 29 July 2017; accepted 27 February 2018)

    Published Online: 2019

    CODEN: JTEVAB

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    Abstract

    A modified one-dimensional testing apparatus that incorporates a bender–extender element system and tactile pressure sensors was developed for the monitoring of particle crushing. The apparatus was tested using five types of glass beads with different particle sizes. The compressional shear wave velocities and their ratio were evaluated with respect to the porosity to establish the microstructural evolution of the granular material. The results showed that the bender–extender element system functioned excellently under high-pressure one-dimensional compression, with the shear wave velocity ratio increasing with increasing loading stress up to 7 MPa and thereafter decreasing. The loading stress of 7 MPa was thus considered the breakage stress of the glass beads, as also reflected by a sharp increase in strain. The glass beads subsequently entered Stage 2 of the crushing process, characterized by significant crushing. Arching of the particle assembly was also clearly observed, and this was enhanced by an increase in the roughness of the side plates of the container. An empirical equation for evaluating the arching was derived. The microstructural evolution and macro behavior of the glass beads under the constrained boundary condition and high compression pressure were found to be analogous to those of the crushing of high-porosity sandstone.

    Author Information:

    Li, Bo
    College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, Zhejiang

    Chen, Liangliang
    College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, Zhejiang

    Wang, Jun
    College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, Zhejiang

    Zeng, Xiangwu
    Department of Civil and Environmental Engineering, Case Western Reserve University, Cleveland, OH


    Stock #: JTE20170626

    ISSN:0090-3973

    DOI: 10.1520/JTE20170626

    Author
    Title Monitoring of Particle Crushing under One-Dimensional Loading
    Symposium ,
    Committee D18