河南城建学院学报2025，Vol.34Issue(5)：1-6,6.DOI:10.14140/j.cnki.hncjxb.2025.05.001
爆炸荷载下裂隙介质裂纹扩展的数值模拟研究
Numerical simulation study on crack propagation in fractured media under explosive loading
摘要
Abstract
To investigate the effect of prefabricated fractures on the dynamic propagation of blast-induced cracks under explosive loading,ANSYS/LS-DYNA software was used,with organic glass plates containing pre-fabricated fractures as the medium.The vertical distance D from the center of the blast hole to the prefabricated fracture was set between 2 cm and 7 cm.The characteristics of crack propagation around the prefabricated frac-tures and blast holes under different spacing conditions,as well as the barrier effect of the prefabricated frac-tures on stress wave propagation,were analyzed.Measuring points were arranged on both sides of the prefabri-cated fractures to monitor the peak effective stress,and the attenuation of stress waves after incident upon the prefabricated fractures at different distances D was studied.The results show that prefabricated fractures have a significant influence on both crack propagation and stress wave transmission.Primarily wing cracks,radial cracks,and laminar cracks develop around the prefabricated fractures.The extension length of wing cracks de-creases as the distance between the blast hole and the prefabricated fracture increases,but the crack initiation angle gradually increases.When D is 2 cm or 3 cm,an explosion cavity forms between the prefabricated frac-ture and the blast hole;at other distances,laminar cracks occur between the blast hole and the prefabricated fractures.Prefabricated fractures hinder the propagation of stress waves,and this hindrance effect gradually weakens as distance D increases.关键词
爆破损伤/裂纹扩展/贯穿机制/裂隙/数值模拟Key words
blast damage/crack propagation/penetration mechanism/fracture/numerical simulation分类
矿山工程引用本文复制引用
孙文翔,缪广红,牛运玖,孙伟波,田子涵..爆炸荷载下裂隙介质裂纹扩展的数值模拟研究[J].河南城建学院学报,2025,34(5):1-6,6.基金项目
国家自然科学基金青年项目(11902003) （11902003）
