|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation Mechanisms
||Determination for Dynamic Fracture Toughness of Linear Elastic Materials Using the Large Dimensional Hopkinson Tube
||Chunhuan Guo, Ding Yuan, Peijun Zhou, Kennth. S. Vecchio, Fengchun Jiang
|On-Site Speaker (Planned)
Owing to limitation of a conventional Hopkinson loading bar dimensions, the geometrical sizes of dynamic fracture specimen are hard to satisfy the plane strain condition. Therefore, the incident and transmission tubes are developed instead of solid bars. In this presentation, the specimens with 10mm×20mm×100mm made of 40Cr was loaded by a novel Hopkinson tube experimental apparatus, the strain gauge method was used to obtain the initial crack onset time of specimen and then the dynamic fracture toughness of 40Cr was calculated by Spring-Mass model and Timoshenko beam theory using the incident, reflected and transmitted pulses. The results indicated that the dynamic force equilibrium is achieved and the dynamic fracture toughness of 40Cr obtained by different calculated methods are very close, which means that there is no significant difference between the dynamic fracture toughness determined by different methods when the force state of fracture specimen is in the dynamic force equilibrium.
||Planned: Supplemental Proceedings volume