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中文摘要：
一条新奇途径在决定高力量钢的动态破裂坚韧(DFT ) 被建议，用裂口 Hopkinson 紧张酒吧(SHTB ) 仪器，与一个混合试验性数字的方法结合了。击碎中心的紧张标本与一台特殊设计的设备设备在酒吧之间被连接。破裂开始时间被紧张抵押品方法测量，并且动态压力紧张因素(DSIF ) 在 3D 的帮助下被获得有限元素分析(FEA ) 。在这条途径，标本的尺寸没被连接力量或压力状态平衡限制条件，和因此飞机紧张状态能在裂缝尖端方便地被达到。通过在在开的出版的获得的结果和那些之间的比较，试验性的数据是有效的，这被结束，并且这里建议的方法是可靠的。获得的 DFT 的有效性与 ASTM 标准被检查，并且破裂表面在纸的结束被检验。
英文摘要：
A novel approach is proposed in determining dy- namic fracture toughness （DFT） of high strength steel, using the split Hopkinson tension bar （SHTB） apparatus, com- bined with a hybrid experimental-numerical method. The center-cracked tension specimen is connected between the bars with a specially designed fixture device. The fracture initiation time is measured by the strain gage method, and dynamic stress intensity factors （DSIF） are obtained with the aid of 3D finite element analysis （FEA）. In this approach, the dimensions of the specimen are not restricted by the connec- tion strength or the stress-state equilibrium conditions, and hence plane strain state can be attained conveniently at the crack tip. Through comparison between the obtained results and those in open publication, it is concluded that the ex- perimental data are valid, and the method proposed here is reliable. The validity of the obtained DFT is checked with the ASTM criteria, and fracture surfaces are examined at the end of paper.
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