BLASTING, Volume. 40, Issue 2, 223(2023)
Teaching Experiment and Simulation Practice of Dynamic Mechanical Properties of Materials in Blasting Engineering Course
It is an important content in the course of "Blasting Engineering" to master the dynamic mechanical response of rock (body) under the action of blasting dynamic load.Since students majoring in civil or mining engineering lack basic theories such as wave mechanics and rock dynamics,the teaching effect is poor when the knowledge of dynamic mechanical properties of rock is explained in class,which will affect the subsequent learning of rock breakage mechanism.Therefore,the Split Hopkinson Pressure Bar(SHPB) experiment of rock materials is applied to the practical teaching of “Blasting Engineering”.By measuring the dynamic compression strength of rock samples and observing the failure forms of specimens,students are guided to understand the dynamic mechanical response of rock materials under different strain rates.The finite element software LS-DYNA is also used to simulate the SHPB experiment,and the process of stress wave propagation and rock failure is reproduced to achieve the demonstration function of dynamic impact.Practice shows that this teaching method enables students to intuitively perceive the stress wave propagation,clearly understand the dynamic failure mechanism of rock,master the relationship between dynamic mechanical properties of rock materials and strain rate,and lay a foundation for further study of blasting engineering theory.
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LI Sheng-lin, LIANG Shu-feng, HOU Shi-jun. Teaching Experiment and Simulation Practice of Dynamic Mechanical Properties of Materials in Blasting Engineering Course[J]. BLASTING, 2023, 40(2): 223
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Received: Jan. 2, 2023
Accepted: --
Published Online: Jan. 22, 2024
The Author Email: Sheng-lin LI (lsl@cumtb.edu.cn)