【摘要】 利用分离式霍普金森压力杆(SHPB) 装置测试了大量花岗岩的单轴冲击本构关系。结果表明:花岗岩的冲击应力应变曲线峰前具有明显的跃进性,但在初始阶段一般都能够较好地近似为直线,直线的斜率与加载速率没有明显的相关性;峰后既有Ⅰ类曲线也有Ⅱ类曲线,表现出较大的离散性。花岗岩的应力应变曲线有时还能表现为递减硬化和递增硬化的特性更多还原

【Abstract】 Many granite constitutive curves under uniaxial impact loading were tested with split Hopkinson pressure bar (SHPB) apparatus.The test results show that the granite constitutive curves have the following properties.They have leap character before peaks,but usually are similar to straight lines before the first extreme,linear slopes have no obvious correlation with the loading rate.They usually appear much more deviation after the maximum (peak) point,and can appear the character not only class Ⅰ,but also class Ⅱ.Sometimes impact stress strain curves of granite can also appear increasing and decreasing hardening.更多还原