Deformation, fracture and mechanical properties of PBX under dynamic loading by using digital speckle correlation method

Zhong bin Zhou*, Pen wan Chen, Shao peng Ma, Feng lei Huang

*此作品的通讯作者

科研成果: 会议稿件论文同行评审

1 引用 (Scopus)

摘要

Brazilian test, semi-circular bend (SCB) test and compression experiments under dynamic loading were performed on a polymer bonded explosive (PBX) stimulant by using a split Hopkinson pressure bar (SHPB). A high-speed photography was used to record the dynamic deformation and fracture process of the samples during impact. Based on the digital speckle correlation method (DSCM), the displacement and strain fields on the sample surface were obtained at macro-scale, revealing the deformation and fracture mechanisms of the specimen under dynamic loading. In addition, an optical microscope combined with a high-speed camera was used to record the dynamic deformation process of a local region near the preset crack in a SCB simulation sample. The strain field was computed by the DSCM technique at micro-scale, demonstrating the microscopic damage evolution and predicting possible failure growth of microcracks in the SCB specimen. Moreover, based on Mohr-Coulomb criterion, the ultimate failure parameters under dynamic uniaxial loading can be obtained. The experimental results are in agreement with theoretical analysis, demonstrating that the DSCM technique is effective to study the dynamic behavior of PBX materials.

源语言英语
1295-1303
页数9
出版状态已出版 - 2010
活动14th International Detonation Symposium, IDS 2010 - Coeur d'Alene, ID, 美国
期限: 11 4月 201016 4月 2010

会议

会议14th International Detonation Symposium, IDS 2010
国家/地区美国
Coeur d'Alene, ID
时期11/04/1016/04/10

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引用此

Zhou, Z. B., Chen, P. W., Ma, S. P., & Huang, F. L. (2010). Deformation, fracture and mechanical properties of PBX under dynamic loading by using digital speckle correlation method. 1295-1303. 论文发表于 14th International Detonation Symposium, IDS 2010, Coeur d'Alene, ID, 美国.