Study on Dynamic Mechanical Properties of Limestone Under Impact Loading

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Shan, Renliang^1 ; Y., Song ; H., Zhang ; M., Wang ; X., Hao

School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing, China^1

关键词: Cumulative damage;    Dynamic mechanical property;    Impact loadings;    Impact loads;    ON dynamics;    Peak strains;    Peak stress;    Uniaxial compressive strength;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/2/022150/pdf
DOI  :  10.1088/1755-1315/300/2/022150

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to study the variation of the mechanical properties of limestone under the condition of impact load, the dynamic mechanical properties of limestone under different strain rate and cyclic impact conditions were studied. The results show that the uniaxial compressive strength of limestone is 93.76MPa and the acoustic velocity is 5122m•s-1, and under the condition of single impact load, the peak stress and strain rate are positively correlated. The peak strain increases with the increase of strain rate, and the larger the strain rate, the more serious the fragmentation of limestone. Under the condition of cyclic impact load, the cumulative damage of limestone increases gradually, and the more impact times, the faster the increase speed.