Experimental Research on Dynamic Response of Layered Medium under Impact Load

Stress waves propagating through multiple parallel fractures are attenuated due to the multiple wave reflections and transmissions at the fractures. The dynamic response of a layered medium under an impact load is systematically studied by a model test in this paper. The effects of the impact energy...

Full description

Saved in:
Bibliographic Details
Published in:Coatings (Basel) 2022-10, Vol.12 (10), p.1474
Main Authors: Liu, Mingqing, Gan, Qinyu
Format: Article
Language:English
Subjects:
Analysis
Attenuation coefficients
Cementation
Concrete slabs
Crack propagation
Deformation
Dynamic response
Empirical analysis
Fractals
Fractures
Impact loads
Impact tests
Kinematics
Laws, regulations and rules
Material properties
Monolayers
Multilayers
Parametric statistics
Plate impact tests
Propagation
Research methodology
Stress propagation
Stress waves
Thickness
Vibration response
Wave propagation
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Stress waves propagating through multiple parallel fractures are attenuated due to the multiple wave reflections and transmissions at the fractures. The dynamic response of a layered medium under an impact load is systematically studied by a model test in this paper. The effects of the impact energy, number of joints, thickness of the medium and joint layer, material properties of the cementation layer, and other factors of the dynamic stress propagation and attenuation of layered media are analyzed. Studies have shown that Sadovsky’s empirical formula fits the attenuation law of vertical peak velocity well, and the obtained attenuation coefficient k and index b can be used for reflecting the dynamic response characteristics of layered media. The attenuation coefficient k is positively correlated with the impact height and negatively correlated with the plate thickness in a single-layer plate impact test. The thickness of the medium layer is the main factor affecting the vibration response of the layered medium in the impact test of the multi-layer slab. The medium thickness, the number of medium layers, and the number of joints have little influence. The different cementation materials and the change of cementation thickness will have a great influence on the dynamic response of layered media, when the cementation layer is filled with joint surfaces for the impact test of multi-layer plates.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings12101474