Page 121 - 《爆炸与冲击》2025年第9期
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第 45 卷 陶子豪,等: 爆破荷载作用下透明脆性材料的三维裂纹扩展行为 第 9 期
(2) 爆后装药区形成高密度放射状裂纹,非装药区裂纹呈耳状或匕首状沿径向扩展,贯穿性强,主要
由爆生气体驱动,是试件破裂的关键破坏形式。
(3) 随着到爆心距离的增大,裂纹面三维形貌特征表现为最大高度和方差先升后降,峰度和偏度整
体降低,表明远离爆心区域后裂纹面趋于平整,表面微凸结构减弱。
(4) 炮孔周围裂纹多以模式Ⅱ启动,受爆生气体驱动后以模式Ⅰ扩展贯通;随着到爆心距离的增大,
裂纹受应力耦合影响,以模式Ⅲ及复合型形式扩展,材料破坏形态复杂。
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