Finally, using the same equipment, the cracked chevron notched Brazilian disc specimens were subjected to diametral impact, the fracture initiation time for the specimen was studied, which laid a foundation for dynamic fracture toughness test in the future. 此外,利用该装置径向冲击CCNBD试样,对试样的起裂时间进行了初步的研究,以便今后对动态断裂韧度进行进一步的测试。