平台CCNBD-SHPB动态断裂韧性试验方法研究

金属矿山 ›› 2010, Vol. 39 ›› Issue (4): 6-9+19.

平台CCNBD-SHPB动态断裂韧性试验方法研究

满轲^{1 2}, 周宏伟¹, 谢敬礼¹

1．中国矿业大学（北京）； 2．瑞士洛桑联邦理工大学

出版日期:2010-04-15 发布日期:2010-11-09
基金资助:
国家重点研究发展计划（973计划）项目(编号：2009CB724602)，科技部国际科技合作项目(编号：2007DFB60100)，国家自然科学基金项目(编号：50674092，50774076)。

Testing Method of Dynamic Fracture Toughness by Flattened CCNBD-SHPB

MAN Ke ^{1 2}, ZHOU Hong-Wei ¹, XIE Jing-Li ¹

1、China University of Mining and Technology,Beijing;
2、 Swiss Federal Institute of Technology Lausanne (EPFL)

Online:2010-04-15 Published:2010-11-09

摘要/Abstract

摘要： 根据CCNBD（Cracked Chevron Notched Brazilian Disc）试件断裂韧性测试方法和分离式Hopkinson压杆（SHPB）的基本原理，研究了平台CCNBD-SHPB系统进行动态断裂韧性测试的方法。探讨了动态力平衡对满足SHPB的应力均匀化以及试验数据处理的重要性；推广了准静态的应力强度因子计算公式，将试件在动态力平衡状态下的最大载荷代入公式，从而得到动态断裂韧性。通过试验对理论进行了验证，结果显示基于平台CCNBD-SHPB的动态断裂韧性测试是准确的。

关键词: CCNBD-SHPB, 动态断裂韧性, 应力强度因子, 动态力平衡

Abstract: Based on the fracture toughness testing method on CCNBD specimen and the principle of SHPB,a new testing research for the dynamic fracture toughness with flattened CCNBD-SHPB was carried out. The importance of making the dynamic force balance satisfy the stress uniformity of SHPB and the tests data process was discussed. It extended the equation of quasi-static stress intensity factor for dynamic fracture toughness calculation. Then,the maximum load under the balanced dynamic force was substituting into the equation to get the value of the dynamic fracture toughness. Tests verified the proposed method in theory,and it showed that this testing based on flattened CCNBD-SHPB was effective.

满轲, 周宏伟, 谢敬礼. 平台CCNBD-SHPB动态断裂韧性试验方法研究[J]. 金属矿山, 2010, 39(4): 6-9+19.

MAN Ke, ZHOU Hong-Wei, XIE Jing-Li. Testing Method of Dynamic Fracture Toughness by Flattened CCNBD-SHPB[J]. Metal Mine, 2010, 39(4): 6-9+19.

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